October 1 update. Our PDGM and ICD-10 tools now use the FY2027 code set: 190 codes added, 30 deleted, and no existing code changed clinical group.

See what changed

ICD-10 · PDGM grouping

T65 Toxic effect of other and unspecified substances

All 192 codes in the T65 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.

ICD-10-CM FY2027 · CMS grouper v07.2.26

Codes in family

192

Can lead a claim

192

Cannot lead a claim

0

What CMS assigns to T65

All 192 codes group to MMTA - Other. None of the 192 is assigned a comorbidity subgroup. Every code can lead a claim.

Every code in T65

Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.

CodeDescriptionPrimary positionClinical groupComorbidity subgroup
T65.0 Toxic effect of cyanides
T65.0X Toxic effect of cyanides
T65.0X1 Toxic effect of cyanides, accidental (unintentional)
T65.0X1AToxic effect of cyanides, accidental (unintentional), initial encounterCMS: Toxic effect of cyanides, accidental (unintentional), initCan lead a claimANone
T65.0X1DToxic effect of cyanides, accidental (unintentional), subsequent encounterCMS: Toxic effect of cyanides, accidental (unintentional), subsCan lead a claimANone
T65.0X1SToxic effect of cyanides, accidental (unintentional), sequelaCMS: Toxic effect of cyanides, accidental, sequelaCan lead a claimANone
T65.0X2 Toxic effect of cyanides, intentional self-harm
T65.0X2AToxic effect of cyanides, intentional self-harm, initial encounterCMS: Toxic effect of cyanides, intentional self-harm, init encntrCan lead a claimANone
T65.0X2DToxic effect of cyanides, intentional self-harm, subsequent encounterCMS: Toxic effect of cyanides, intentional self-harm, subs encntrCan lead a claimANone
T65.0X2SToxic effect of cyanides, intentional self-harm, sequelaCan lead a claimANone
T65.0X3 Toxic effect of cyanides, assault
T65.0X3AToxic effect of cyanides, assault, initial encounterCan lead a claimANone
T65.0X3DToxic effect of cyanides, assault, subsequent encounterCan lead a claimANone
T65.0X3SToxic effect of cyanides, assault, sequelaCan lead a claimANone
T65.0X4 Toxic effect of cyanides, undetermined
T65.0X4AToxic effect of cyanides, undetermined, initial encounterCan lead a claimANone
T65.0X4DToxic effect of cyanides, undetermined, subsequent encounterCan lead a claimANone
T65.0X4SToxic effect of cyanides, undetermined, sequelaCan lead a claimANone
T65.1 Toxic effect of strychnine and its salts
T65.1X Toxic effect of strychnine and its salts
T65.1X1 Toxic effect of strychnine and its salts, accidental (unintentional)
T65.1X1AToxic effect of strychnine and its salts, accidental (unintentional), initial encounterCMS: Toxic effect of strychnine and its salts, accidental, initCan lead a claimANone
T65.1X1DToxic effect of strychnine and its salts, accidental (unintentional), subsequent encounterCMS: Toxic effect of strychnine and its salts, accidental, subsCan lead a claimANone
T65.1X1SToxic effect of strychnine and its salts, accidental (unintentional), sequelaCMS: Toxic effect of strychnine and its salts, acc, sequelaCan lead a claimANone
T65.1X2 Toxic effect of strychnine and its salts, intentional self-harm
T65.1X2AToxic effect of strychnine and its salts, intentional self-harm, initial encounterCMS: Toxic effect of strychnine and its salts, self-harm, initCan lead a claimANone
T65.1X2DToxic effect of strychnine and its salts, intentional self-harm, subsequent encounterCMS: Toxic effect of strychnine and its salts, self-harm, subsCan lead a claimANone
T65.1X2SToxic effect of strychnine and its salts, intentional self-harm, sequelaCMS: Toxic effect of strychnine and its salts, self-harm, sequelaCan lead a claimANone
T65.1X3 Toxic effect of strychnine and its salts, assault
T65.1X3AToxic effect of strychnine and its salts, assault, initial encounterCMS: Toxic effect of strychnine and its salts, assault, initCan lead a claimANone
T65.1X3DToxic effect of strychnine and its salts, assault, subsequent encounterCMS: Toxic effect of strychnine and its salts, assault, subsCan lead a claimANone
T65.1X3SToxic effect of strychnine and its salts, assault, sequelaCan lead a claimANone
T65.1X4 Toxic effect of strychnine and its salts, undetermined
T65.1X4AToxic effect of strychnine and its salts, undetermined, initial encounterCMS: Toxic effect of strychnine and its salts, undetermined, initCan lead a claimANone
T65.1X4DToxic effect of strychnine and its salts, undetermined, subsequent encounterCMS: Toxic effect of strychnine and its salts, undetermined, subsCan lead a claimANone
T65.1X4SToxic effect of strychnine and its salts, undetermined, sequelaCMS: Toxic effect of strychnine and its salts, undet, sequelaCan lead a claimANone
T65.2 Toxic effect of tobacco and nicotine
T65.21 Toxic effect of chewing tobacco
T65.211 Toxic effect of chewing tobacco, accidental (unintentional)
T65.211AToxic effect of chewing tobacco, accidental (unintentional), initial encounterCMS: Toxic effect of chewing tobacco, accidental, initCan lead a claimANone
T65.211DToxic effect of chewing tobacco, accidental (unintentional), subsequent encounterCMS: Toxic effect of chewing tobacco, accidental, subsCan lead a claimANone
T65.211SToxic effect of chewing tobacco, accidental (unintentional), sequelaCMS: Toxic effect of chewing tobacco, accidental, sequelaCan lead a claimANone
T65.212 Toxic effect of chewing tobacco, intentional self-harm
T65.212AToxic effect of chewing tobacco, intentional self-harm, initial encounterCMS: Toxic effect of chewing tobacco, intentional self-harm, initCan lead a claimANone
T65.212DToxic effect of chewing tobacco, intentional self-harm, subsequent encounterCMS: Toxic effect of chewing tobacco, intentional self-harm, subsCan lead a claimANone
T65.212SToxic effect of chewing tobacco, intentional self-harm, sequelaCMS: Toxic effect of chewing tobacco, self-harm, sequelaCan lead a claimANone
T65.213 Toxic effect of chewing tobacco, assault
T65.213AToxic effect of chewing tobacco, assault, initial encounterCan lead a claimANone
T65.213DToxic effect of chewing tobacco, assault, subsequent encounterCMS: Toxic effect of chewing tobacco, assault, subs encntrCan lead a claimANone
T65.213SToxic effect of chewing tobacco, assault, sequelaCan lead a claimANone
T65.214 Toxic effect of chewing tobacco, undetermined
T65.214AToxic effect of chewing tobacco, undetermined, initial encounterCMS: Toxic effect of chewing tobacco, undetermined, init encntrCan lead a claimANone
T65.214DToxic effect of chewing tobacco, undetermined, subsequent encounterCMS: Toxic effect of chewing tobacco, undetermined, subs encntrCan lead a claimANone
T65.214SToxic effect of chewing tobacco, undetermined, sequelaCan lead a claimANone
T65.22 Toxic effect of tobacco cigarettes
T65.221 Toxic effect of tobacco cigarettes, accidental (unintentional)
T65.221AToxic effect of tobacco cigarettes, accidental (unintentional), initial encounterCMS: Toxic effect of tobacco cigarettes, accidental, initCan lead a claimANone
T65.221DToxic effect of tobacco cigarettes, accidental (unintentional), subsequent encounterCMS: Toxic effect of tobacco cigarettes, accidental, subsCan lead a claimANone
T65.221SToxic effect of tobacco cigarettes, accidental (unintentional), sequelaCMS: Toxic effect of tobacco cigarettes, accidental, sequelaCan lead a claimANone
T65.222 Toxic effect of tobacco cigarettes, intentional self-harm
T65.222AToxic effect of tobacco cigarettes, intentional self-harm, initial encounterCMS: Toxic effect of tobacco cigarettes, self-harm, initCan lead a claimANone
T65.222DToxic effect of tobacco cigarettes, intentional self-harm, subsequent encounterCMS: Toxic effect of tobacco cigarettes, self-harm, subsCan lead a claimANone
T65.222SToxic effect of tobacco cigarettes, intentional self-harm, sequelaCMS: Toxic effect of tobacco cigarettes, self-harm, sequelaCan lead a claimANone
T65.223 Toxic effect of tobacco cigarettes, assault
T65.223AToxic effect of tobacco cigarettes, assault, initial encounterCMS: Toxic effect of tobacco cigarettes, assault, init encntrCan lead a claimANone
T65.223DToxic effect of tobacco cigarettes, assault, subsequent encounterCMS: Toxic effect of tobacco cigarettes, assault, subs encntrCan lead a claimANone
T65.223SToxic effect of tobacco cigarettes, assault, sequelaCan lead a claimANone
T65.224 Toxic effect of tobacco cigarettes, undetermined
T65.224AToxic effect of tobacco cigarettes, undetermined, initial encounterCMS: Toxic effect of tobacco cigarettes, undetermined, initCan lead a claimANone
T65.224DToxic effect of tobacco cigarettes, undetermined, subsequent encounterCMS: Toxic effect of tobacco cigarettes, undetermined, subsCan lead a claimANone
T65.224SToxic effect of tobacco cigarettes, undetermined, sequelaCan lead a claimANone
T65.29 Toxic effect of other tobacco and nicotine
T65.291 Toxic effect of other tobacco and nicotine, accidental (unintentional)
T65.291AToxic effect of other tobacco and nicotine, accidental (unintentional), initial encounterCMS: Toxic effect of tobacco and nicotine, accidental, initCan lead a claimANone
T65.291DToxic effect of other tobacco and nicotine, accidental (unintentional), subsequent encounterCMS: Toxic effect of tobacco and nicotine, accidental, subsCan lead a claimANone
T65.291SToxic effect of other tobacco and nicotine, accidental (unintentional), sequelaCMS: Toxic effect of tobacco and nicotine, accidental, sequelaCan lead a claimANone
T65.292 Toxic effect of other tobacco and nicotine, intentional self-harm
T65.292AToxic effect of other tobacco and nicotine, intentional self-harm, initial encounterCMS: Toxic effect of tobacco and nicotine, self-harm, initCan lead a claimANone
T65.292DToxic effect of other tobacco and nicotine, intentional self-harm, subsequent encounterCMS: Toxic effect of tobacco and nicotine, self-harm, subsCan lead a claimANone
T65.292SToxic effect of other tobacco and nicotine, intentional self-harm, sequelaCMS: Toxic effect of tobacco and nicotine, self-harm, sequelaCan lead a claimANone
T65.293 Toxic effect of other tobacco and nicotine, assault
T65.293AToxic effect of other tobacco and nicotine, assault, initial encounterCMS: Toxic effect of oth tobacco and nicotine, assault, initCan lead a claimANone
T65.293DToxic effect of other tobacco and nicotine, assault, subsequent encounterCMS: Toxic effect of oth tobacco and nicotine, assault, subsCan lead a claimANone
T65.293SToxic effect of other tobacco and nicotine, assault, sequelaCan lead a claimANone
T65.294 Toxic effect of other tobacco and nicotine, undetermined
T65.294AToxic effect of other tobacco and nicotine, undetermined, initial encounterCMS: Toxic effect of oth tobacco and nicotine, undetermined, initCan lead a claimANone
T65.294DToxic effect of other tobacco and nicotine, undetermined, subsequent encounterCMS: Toxic effect of oth tobacco and nicotine, undetermined, subsCan lead a claimANone
T65.294SToxic effect of other tobacco and nicotine, undetermined, sequelaCMS: Toxic effect of tobacco and nicotine, undetermined, sequelaCan lead a claimANone
T65.3 Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues
T65.3X Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues
T65.3X1 Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, accidental (unintentional)
T65.3X1AToxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, accidental (unintentional), initial encounterCMS: Toxic eff of nitrodrv/aminodrv of benzn/homolog, acc, initCan lead a claimANone
T65.3X1DToxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, accidental (unintentional), subsequent encounterCMS: Toxic eff of nitrodrv/aminodrv of benzn/homolog, acc, subsCan lead a claimANone
T65.3X1SToxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, accidental (unintentional), sequelaCMS: Toxic eff of nitrodrv/aminodrv of benzn/homolog, acc, sqlaCan lead a claimANone
T65.3X2 Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, intentional self-harm
T65.3X2AToxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, intentional self-harm, initial encounterCMS: Tox eff of nitrodrv/aminodrv of benzn/homolog, slf-hrm, initCan lead a claimANone
T65.3X2DToxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, intentional self-harm, subsequent encounterCMS: Tox eff of nitrodrv/aminodrv of benzn/homolog, slf-hrm, subsCan lead a claimANone
T65.3X2SToxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, intentional self-harm, sequelaCMS: Tox eff of nitrodrv/aminodrv of benzn/homolog, slf-hrm, sqlaCan lead a claimANone
T65.3X3 Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, assault
T65.3X3AToxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, assault, initial encounterCMS: Toxic eff of nitrodrv/aminodrv of benzn/homolog, asslt, initCan lead a claimANone
T65.3X3DToxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, assault, subsequent encounterCMS: Toxic eff of nitrodrv/aminodrv of benzn/homolog, asslt, subsCan lead a claimANone
T65.3X3SToxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, assault, sequelaCMS: Toxic eff of nitrodrv/aminodrv of benzn/homolog, asslt, sqlaCan lead a claimANone
T65.3X4 Toxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, undetermined
T65.3X4AToxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, undetermined, initial encounterCMS: Toxic eff of nitrodrv/aminodrv of benzn/homolog, undet, initCan lead a claimANone
T65.3X4DToxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, undetermined, subsequent encounterCMS: Toxic eff of nitrodrv/aminodrv of benzn/homolog, undet, subsCan lead a claimANone
T65.3X4SToxic effect of nitroderivatives and aminoderivatives of benzene and its homologues, undetermined, sequelaCMS: Toxic eff of nitrodrv/aminodrv of benzn/homolog, undet, sqlaCan lead a claimANone
T65.4 Toxic effect of carbon disulfide
T65.4X Toxic effect of carbon disulfide
T65.4X1 Toxic effect of carbon disulfide, accidental (unintentional)
T65.4X1AToxic effect of carbon disulfide, accidental (unintentional), initial encounterCMS: Toxic effect of carbon disulfide, accidental, initCan lead a claimANone
T65.4X1DToxic effect of carbon disulfide, accidental (unintentional), subsequent encounterCMS: Toxic effect of carbon disulfide, accidental, subsCan lead a claimANone
T65.4X1SToxic effect of carbon disulfide, accidental (unintentional), sequelaCMS: Toxic effect of carbon disulfide, accidental, sequelaCan lead a claimANone
T65.4X2 Toxic effect of carbon disulfide, intentional self-harm
T65.4X2AToxic effect of carbon disulfide, intentional self-harm, initial encounterCMS: Toxic effect of carbon disulfide, self-harm, initCan lead a claimANone
T65.4X2DToxic effect of carbon disulfide, intentional self-harm, subsequent encounterCMS: Toxic effect of carbon disulfide, self-harm, subsCan lead a claimANone
T65.4X2SToxic effect of carbon disulfide, intentional self-harm, sequelaCMS: Toxic effect of carbon disulfide, self-harm, sequelaCan lead a claimANone
T65.4X3 Toxic effect of carbon disulfide, assault
T65.4X3AToxic effect of carbon disulfide, assault, initial encounterCan lead a claimANone
T65.4X3DToxic effect of carbon disulfide, assault, subsequent encounterCMS: Toxic effect of carbon disulfide, assault, subs encntrCan lead a claimANone
T65.4X3SToxic effect of carbon disulfide, assault, sequelaCan lead a claimANone
T65.4X4 Toxic effect of carbon disulfide, undetermined
T65.4X4AToxic effect of carbon disulfide, undetermined, initial encounterCMS: Toxic effect of carbon disulfide, undetermined, init encntrCan lead a claimANone
T65.4X4DToxic effect of carbon disulfide, undetermined, subsequent encounterCMS: Toxic effect of carbon disulfide, undetermined, subs encntrCan lead a claimANone
T65.4X4SToxic effect of carbon disulfide, undetermined, sequelaCan lead a claimANone
T65.5 Toxic effect of nitroglycerin and other nitric acids and esters
T65.5X Toxic effect of nitroglycerin and other nitric acids and esters
T65.5X1 Toxic effect of nitroglycerin and other nitric acids and esters, accidental (unintentional)
T65.5X1AToxic effect of nitroglycerin and other nitric acids and esters, accidental (unintentional), initial encounterCMS: Tox eff of nitro and oth nitric acids and esters, acc, initCan lead a claimANone
T65.5X1DToxic effect of nitroglycerin and other nitric acids and esters, accidental (unintentional), subsequent encounterCMS: Tox eff of nitro and oth nitric acids and esters, acc, subsCan lead a claimANone
T65.5X1SToxic effect of nitroglycerin and other nitric acids and esters, accidental (unintentional), sequelaCMS: Tox eff of nitro and oth nitric acids and esters, acc, sqlaCan lead a claimANone
T65.5X2 Toxic effect of nitroglycerin and other nitric acids and esters, intentional self-harm
T65.5X2AToxic effect of nitroglycerin and other nitric acids and esters, intentional self-harm, initial encounterCMS: Tox eff of nitro & oth nitric acids & esters, slf-hrm, initCan lead a claimANone
T65.5X2DToxic effect of nitroglycerin and other nitric acids and esters, intentional self-harm, subsequent encounterCMS: Tox eff of nitro & oth nitric acids & esters, slf-hrm, subsCan lead a claimANone
T65.5X2SToxic effect of nitroglycerin and other nitric acids and esters, intentional self-harm, sequelaCMS: Tox eff of nitro & oth nitric acids & esters, slf-hrm, sqlaCan lead a claimANone
T65.5X3 Toxic effect of nitroglycerin and other nitric acids and esters, assault
T65.5X3AToxic effect of nitroglycerin and other nitric acids and esters, assault, initial encounterCMS: Tox eff of nitro & oth nitric acids and esters, asslt, initCan lead a claimANone
T65.5X3DToxic effect of nitroglycerin and other nitric acids and esters, assault, subsequent encounterCMS: Tox eff of nitro & oth nitric acids and esters, asslt, subsCan lead a claimANone
T65.5X3SToxic effect of nitroglycerin and other nitric acids and esters, assault, sequelaCMS: Tox eff of nitro & oth nitric acids and esters, asslt, sqlaCan lead a claimANone
T65.5X4 Toxic effect of nitroglycerin and other nitric acids and esters, undetermined
T65.5X4AToxic effect of nitroglycerin and other nitric acids and esters, undetermined, initial encounterCMS: Tox eff of nitro & oth nitric acids and esters, undet, initCan lead a claimANone
T65.5X4DToxic effect of nitroglycerin and other nitric acids and esters, undetermined, subsequent encounterCMS: Tox eff of nitro & oth nitric acids and esters, undet, subsCan lead a claimANone
T65.5X4SToxic effect of nitroglycerin and other nitric acids and esters, undetermined, sequelaCMS: Tox eff of nitro & oth nitric acids and esters, undet, sqlaCan lead a claimANone
T65.6 Toxic effect of paints and dyes, not elsewhere classified
T65.6X Toxic effect of paints and dyes, not elsewhere classified
T65.6X1 Toxic effect of paints and dyes, not elsewhere classified, accidental (unintentional)
T65.6X1AToxic effect of paints and dyes, not elsewhere classified, accidental (unintentional), initial encounterCMS: Toxic effect of paints and dyes, NEC, accidental, initCan lead a claimANone
T65.6X1DToxic effect of paints and dyes, not elsewhere classified, accidental (unintentional), subsequent encounterCMS: Toxic effect of paints and dyes, NEC, accidental, subsCan lead a claimANone
T65.6X1SToxic effect of paints and dyes, not elsewhere classified, accidental (unintentional), sequelaCMS: Toxic effect of paints and dyes, NEC, accidental, sequelaCan lead a claimANone
T65.6X2 Toxic effect of paints and dyes, not elsewhere classified, intentional self-harm
T65.6X2AToxic effect of paints and dyes, not elsewhere classified, intentional self-harm, initial encounterCMS: Toxic effect of paints and dyes, NEC, self-harm, initCan lead a claimANone
T65.6X2DToxic effect of paints and dyes, not elsewhere classified, intentional self-harm, subsequent encounterCMS: Toxic effect of paints and dyes, NEC, self-harm, subsCan lead a claimANone
T65.6X2SToxic effect of paints and dyes, not elsewhere classified, intentional self-harm, sequelaCMS: Toxic effect of paints and dyes, NEC, self-harm, sequelaCan lead a claimANone
T65.6X3 Toxic effect of paints and dyes, not elsewhere classified, assault
T65.6X3AToxic effect of paints and dyes, not elsewhere classified, assault, initial encounterCMS: Toxic effect of paints and dyes, NEC, assault, initCan lead a claimANone
T65.6X3DToxic effect of paints and dyes, not elsewhere classified, assault, subsequent encounterCMS: Toxic effect of paints and dyes, NEC, assault, subsCan lead a claimANone
T65.6X3SToxic effect of paints and dyes, not elsewhere classified, assault, sequelaCMS: Toxic effect of paints and dyes, NEC, assault, sequelaCan lead a claimANone
T65.6X4 Toxic effect of paints and dyes, not elsewhere classified, undetermined
T65.6X4AToxic effect of paints and dyes, not elsewhere classified, undetermined, initial encounterCMS: Toxic effect of paints and dyes, NEC, undetermined, initCan lead a claimANone
T65.6X4DToxic effect of paints and dyes, not elsewhere classified, undetermined, subsequent encounterCMS: Toxic effect of paints and dyes, NEC, undetermined, subsCan lead a claimANone
T65.6X4SToxic effect of paints and dyes, not elsewhere classified, undetermined, sequelaCMS: Toxic effect of paints and dyes, NEC, undetermined, sequelaCan lead a claimANone
T65.8 Toxic effect of other specified substances
T65.81 Toxic effect of latex
T65.811 Toxic effect of latex, accidental (unintentional)
T65.811AToxic effect of latex, accidental (unintentional), initial encounterCMS: Toxic effect of latex, accidental (unintentional), initCan lead a claimANone
T65.811DToxic effect of latex, accidental (unintentional), subsequent encounterCMS: Toxic effect of latex, accidental (unintentional), subsCan lead a claimANone
T65.811SToxic effect of latex, accidental (unintentional), sequelaCan lead a claimANone
T65.812 Toxic effect of latex, intentional self-harm
T65.812AToxic effect of latex, intentional self-harm, initial encounterCMS: Toxic effect of latex, intentional self-harm, init encntrCan lead a claimANone
T65.812DToxic effect of latex, intentional self-harm, subsequent encounterCMS: Toxic effect of latex, intentional self-harm, subs encntrCan lead a claimANone
T65.812SToxic effect of latex, intentional self-harm, sequelaCan lead a claimANone
T65.813 Toxic effect of latex, assault
T65.813AToxic effect of latex, assault, initial encounterCan lead a claimANone
T65.813DToxic effect of latex, assault, subsequent encounterCan lead a claimANone
T65.813SToxic effect of latex, assault, sequelaCan lead a claimANone
T65.814 Toxic effect of latex, undetermined
T65.814AToxic effect of latex, undetermined, initial encounterCan lead a claimANone
T65.814DToxic effect of latex, undetermined, subsequent encounterCan lead a claimANone
T65.814SToxic effect of latex, undetermined, sequelaCan lead a claimANone
T65.82 Toxic effect of harmful algae and algae toxins
T65.821 Toxic effect of harmful algae and algae toxins, accidental (unintentional)
T65.821AToxic effect of harmful algae and algae toxins, accidental (unintentional), initial encounterCMS: Toxic effect of harmful algae and algae toxins, acc, initCan lead a claimANone
T65.821DToxic effect of harmful algae and algae toxins, accidental (unintentional), subsequent encounterCMS: Toxic effect of harmful algae and algae toxins, acc, subsCan lead a claimANone
T65.821SToxic effect of harmful algae and algae toxins, accidental (unintentional), sequelaCMS: Toxic effect of harmful algae and algae toxins, acc, sqlaCan lead a claimANone
T65.822 Toxic effect of harmful algae and algae toxins, intentional self-harm
T65.822AToxic effect of harmful algae and algae toxins, intentional self-harm, initial encounterCMS: Toxic eff of harmful algae and algae toxins, slf-hrm, initCan lead a claimANone
T65.822DToxic effect of harmful algae and algae toxins, intentional self-harm, subsequent encounterCMS: Toxic eff of harmful algae and algae toxins, slf-hrm, subsCan lead a claimANone
T65.822SToxic effect of harmful algae and algae toxins, intentional self-harm, sequelaCMS: Toxic eff of harmful algae and algae toxins, slf-hrm, sqlaCan lead a claimANone
T65.823 Toxic effect of harmful algae and algae toxins, assault
T65.823AToxic effect of harmful algae and algae toxins, assault, initial encounterCMS: Toxic effect of harmful algae and algae toxins, asslt, initCan lead a claimANone
T65.823DToxic effect of harmful algae and algae toxins, assault, subsequent encounterCMS: Toxic effect of harmful algae and algae toxins, asslt, subsCan lead a claimANone
T65.823SToxic effect of harmful algae and algae toxins, assault, sequelaCMS: Toxic effect of harmful algae and algae toxins, asslt, sqlaCan lead a claimANone
T65.824 Toxic effect of harmful algae and algae toxins, undetermined
T65.824AToxic effect of harmful algae and algae toxins, undetermined, initial encounterCMS: Toxic effect of harmful algae and algae toxins, undet, initCan lead a claimANone
T65.824DToxic effect of harmful algae and algae toxins, undetermined, subsequent encounterCMS: Toxic effect of harmful algae and algae toxins, undet, subsCan lead a claimANone
T65.824SToxic effect of harmful algae and algae toxins, undetermined, sequelaCMS: Toxic effect of harmful algae and algae toxins, undet, sqlaCan lead a claimANone
T65.83 Toxic effect of fiberglass
T65.831 Toxic effect of fiberglass, accidental (unintentional)
T65.831AToxic effect of fiberglass, accidental (unintentional), initial encounterCMS: Toxic effect of fiberglass, accidental (unintentional), initCan lead a claimANone
T65.831DToxic effect of fiberglass, accidental (unintentional), subsequent encounterCMS: Toxic effect of fiberglass, accidental (unintentional), subsCan lead a claimANone
T65.831SToxic effect of fiberglass, accidental (unintentional), sequelaCMS: Toxic effect of fiberglass, accidental, sequelaCan lead a claimANone
T65.832 Toxic effect of fiberglass, intentional self-harm
T65.832AToxic effect of fiberglass, intentional self-harm, initial encounterCMS: Toxic effect of fiberglass, intentional self-harm, initCan lead a claimANone
T65.832DToxic effect of fiberglass, intentional self-harm, subsequent encounterCMS: Toxic effect of fiberglass, intentional self-harm, subsCan lead a claimANone
T65.832SToxic effect of fiberglass, intentional self-harm, sequelaCan lead a claimANone
T65.833 Toxic effect of fiberglass, assault
T65.833AToxic effect of fiberglass, assault, initial encounterCan lead a claimANone
T65.833DToxic effect of fiberglass, assault, subsequent encounterCan lead a claimANone
T65.833SToxic effect of fiberglass, assault, sequelaCan lead a claimANone
T65.834 Toxic effect of fiberglass, undetermined
T65.834AToxic effect of fiberglass, undetermined, initial encounterCan lead a claimANone
T65.834DToxic effect of fiberglass, undetermined, subsequent encounterCMS: Toxic effect of fiberglass, undetermined, subs encntrCan lead a claimANone
T65.834SToxic effect of fiberglass, undetermined, sequelaCan lead a claimANone
T65.84 Toxic effect of xylazine
T65.841 Toxic effect of xylazine, accidental (unintentional)
T65.841AToxic effect of xylazine, accidental (unintentional), initial encounterCMS: Toxic effect of xylazine, accidental (unintentional), initCan lead a claimANone
T65.841DToxic effect of xylazine, accidental (unintentional), subsequent encounterCMS: Toxic effect of xylazine, accidental (unintentional), subsCan lead a claimANone
T65.841SToxic effect of xylazine, accidental (unintentional), sequelaCMS: Toxic effect of xylazine, accidental, sequelaCan lead a claimANone
T65.842 Toxic effect of xylazine, intentional self-harm
T65.842AToxic effect of xylazine, intentional self-harm, initial encounterCMS: Toxic effect of xylazine, self-harm, initial encounterCan lead a claimANone
T65.842DToxic effect of xylazine, intentional self-harm, subsequent encounterCMS: Toxic effect of xylazine, self-harm, subsequent encounterCan lead a claimANone
T65.842SToxic effect of xylazine, intentional self-harm, sequelaCan lead a claimANone
T65.843 Toxic effect of xylazine, assault
T65.843AToxic effect of xylazine, assault, initial encounterCan lead a claimANone
T65.843DToxic effect of xylazine, assault, subsequent encounterCan lead a claimANone
T65.843SToxic effect of xylazine, assault, sequelaCan lead a claimANone
T65.844 Toxic effect of xylazine, undetermined
T65.844AToxic effect of xylazine, undetermined, initial encounterCan lead a claimANone
T65.844DToxic effect of xylazine, undetermined, subsequent encounterCan lead a claimANone
T65.844SToxic effect of xylazine, undetermined, sequelaCan lead a claimANone
T65.85 Toxic effect of medetomidine
T65.851 Toxic effect of medetomidine, accidental (unintentional)
T65.851AToxic effect of medetomidine, accidental (unintentional), initial encounterCMS: Toxic effect of medetomidine, accidental, initCan lead a claimANone
T65.851DToxic effect of medetomidine, accidental (unintentional), subsequent encounterCMS: Toxic effect of medetomidine, accidental, subsCan lead a claimANone
T65.851SToxic effect of medetomidine, accidental (unintentional), sequelaCMS: Toxic effect of medetomidine, accidental, sequelaCan lead a claimANone
T65.852 Toxic effect of medetomidine, intentional self-harm
T65.852AToxic effect of medetomidine, intentional self-harm, initial encounterCMS: Toxic effect of medetomidine, self-harm, initial encounterCan lead a claimANone
T65.852DToxic effect of medetomidine, intentional self-harm, subsequent encounterCMS: Toxic effect of medetomidine, self-harm, subsCan lead a claimANone
T65.852SToxic effect of medetomidine, intentional self-harm, sequelaCan lead a claimANone
T65.853 Toxic effect of medetomidine, assault
T65.853AToxic effect of medetomidine, assault, initial encounterCan lead a claimANone
T65.853DToxic effect of medetomidine, assault, subsequent encounterCan lead a claimANone
T65.853SToxic effect of medetomidine, assault, sequelaCan lead a claimANone
T65.854 Toxic effect of medetomidine, undetermined
T65.854AToxic effect of medetomidine, undetermined, initial encounterCMS: Toxic effect of medetomidine, undetermined, initCan lead a claimANone
T65.854DToxic effect of medetomidine, undetermined, subsequent encounterCMS: Toxic effect of medetomidine, undetermined, subsCan lead a claimANone
T65.854SToxic effect of medetomidine, undetermined, sequelaCan lead a claimANone
T65.89 Toxic effect of other specified substances
T65.891 Toxic effect of other specified substances, accidental (unintentional)
T65.891AToxic effect of other specified substances, accidental (unintentional), initial encounterCMS: Toxic effect of substances, accidental (unintentional), initCan lead a claimANone
T65.891DToxic effect of other specified substances, accidental (unintentional), subsequent encounterCMS: Toxic effect of substances, accidental (unintentional), subsCan lead a claimANone
T65.891SToxic effect of other specified substances, accidental (unintentional), sequelaCMS: Toxic effect of substances, accidental, sequelaCan lead a claimANone
T65.892 Toxic effect of other specified substances, intentional self-harm
T65.892AToxic effect of other specified substances, intentional self-harm, initial encounterCMS: Toxic effect of oth substances, intentional self-harm, initCan lead a claimANone
T65.892DToxic effect of other specified substances, intentional self-harm, subsequent encounterCMS: Toxic effect of oth substances, intentional self-harm, subsCan lead a claimANone
T65.892SToxic effect of other specified substances, intentional self-harm, sequelaCMS: Toxic effect of substances, intentional self-harm, sequelaCan lead a claimANone
T65.893 Toxic effect of other specified substances, assault
T65.893AToxic effect of other specified substances, assault, initial encounterCMS: Toxic effect of oth substances, assault, init encntrCan lead a claimANone
T65.893DToxic effect of other specified substances, assault, subsequent encounterCMS: Toxic effect of oth substances, assault, subs encntrCan lead a claimANone
T65.893SToxic effect of other specified substances, assault, sequelaCan lead a claimANone
T65.894 Toxic effect of other specified substances, undetermined
T65.894AToxic effect of other specified substances, undetermined, initial encounterCMS: Toxic effect of oth substances, undetermined, init encntrCan lead a claimANone
T65.894DToxic effect of other specified substances, undetermined, subsequent encounterCMS: Toxic effect of oth substances, undetermined, subs encntrCan lead a claimANone
T65.894SToxic effect of other specified substances, undetermined, sequelaCMS: Toxic effect of oth substances, undetermined, sequelaCan lead a claimANone
T65.9 Toxic effect of unspecified substance
T65.91 Toxic effect of unspecified substance, accidental (unintentional)
T65.91XAToxic effect of unspecified substance, accidental (unintentional), initial encounterCMS: Toxic effect of unsp substance, accidental, initCan lead a claimANone
T65.91XDToxic effect of unspecified substance, accidental (unintentional), subsequent encounterCMS: Toxic effect of unsp substance, accidental, subsCan lead a claimANone
T65.91XSToxic effect of unspecified substance, accidental (unintentional), sequelaCMS: Toxic effect of unsp substance, accidental, sequelaCan lead a claimANone
T65.92 Toxic effect of unspecified substance, intentional self-harm
T65.92XAToxic effect of unspecified substance, intentional self-harm, initial encounterCMS: Toxic effect of unsp substance, intentional self-harm, initCan lead a claimANone
T65.92XDToxic effect of unspecified substance, intentional self-harm, subsequent encounterCMS: Toxic effect of unsp substance, intentional self-harm, subsCan lead a claimANone
T65.92XSToxic effect of unspecified substance, intentional self-harm, sequelaCMS: Toxic effect of unsp substance, self-harm, sequelaCan lead a claimANone
T65.93 Toxic effect of unspecified substance, assault
T65.93XAToxic effect of unspecified substance, assault, initial encounterCMS: Toxic effect of unspecified substance, assault, init encntrCan lead a claimANone
T65.93XDToxic effect of unspecified substance, assault, subsequent encounterCMS: Toxic effect of unspecified substance, assault, subs encntrCan lead a claimANone
T65.93XSToxic effect of unspecified substance, assault, sequelaCan lead a claimANone
T65.94 Toxic effect of unspecified substance, undetermined
T65.94XAToxic effect of unspecified substance, undetermined, initial encounterCMS: Toxic effect of unsp substance, undetermined, init encntrCan lead a claimANone
T65.94XDToxic effect of unspecified substance, undetermined, subsequent encounterCMS: Toxic effect of unsp substance, undetermined, subs encntrCan lead a claimANone
T65.94XSToxic effect of unspecified substance, undetermined, sequelaCan lead a claimANone

Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.

The monthly home health regs digest

What CMS changed, what's due next, and what to do about it — one email a month, no fluff. Read the first issue