ICD-10 · PDGM grouping
Z91 Personal risk factors, not elsewhere classified
All 62 codes in the Z91 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
62
Can lead a claim
0
Cannot lead a claim
62
What CMS assigns to Z91
None of the 62 codes is assigned a clinical group. None of the 62 is assigned a comorbidity subgroup. None can lead a claim. CMS attaches a code-first note to 10 of the 62.
Code first
CMS grouper convention 179, on Z91.120, Z91.128, Z91.130, Z91.138, Z91.A20, Z91.A28, Z91.A3. Code first:
- underdosing of medication (T36-T50) with fifth or sixth character 6
CMS grouper convention 180, on Z91.141, Z91.148. Code first:
- , if applicable, adverse effect of underdosing (T36-T50)
CMS grouper convention 181, on Z91.83. Code first:
- Alzheimer's disease (G30.-)
- autism or pervasive developmental disorder (F84.-)
- intellectual disabilities (F70-F79)
- underlying disorder such as:
- unspecified dementia with behavioral disturbance (F03.9-, F03.A-, F03.B-, F03.C-)
Every code in Z91
Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.
| Code | Description | Primary position | Clinical group | Comorbidity subgroup |
|---|---|---|---|---|
| Z91.0 Allergy status, other than to drugs and biological substances | ||||
| Z91.01 Food allergy status | ||||
| Z91.010 | Allergy to peanuts | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.011 Allergy to milk products | ||||
| Z91.0110 | Allergy to milk products, unspecified | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.0111 | Allergy to milk products with tolerance to baked milk | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.0112 | Allergy to milk products with reactivity to baked milk | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.012 Allergy to eggs | ||||
| Z91.0120 | Allergy to eggs, unspecified | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.0121 | Allergy to eggs with tolerance to baked egg | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.0122 | Allergy to eggs with reactivity to baked egg | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.013 | Allergy to seafood | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.014 | Allergy to mammalian meats | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.018 | Allergy to other foods | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.02 | Food additives allergy status | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.03 Insect allergy status | ||||
| Z91.030 | Bee allergy status | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.038 | Other insect allergy status | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.04 Nonmedicinal substance allergy status | ||||
| Z91.040 | Latex allergy status | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.041 | Radiographic dye allergy status | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.048 | Other nonmedicinal substance allergy status | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.09 | Other allergy status, other than to drugs and biological substancesCMS: Oth allergy status, oth than to drugs and biolg substances | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.1 Patient's noncompliance with medical treatment and regimen | ||||
| Z91.11 Patient's noncompliance with dietary regimen | ||||
| Z91.110 | Patient's noncompliance with dietary regimen due to financial hardshipCMS: Pt noncompl with dietary regimen due to financl hardship | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.118 | Patient's noncompliance with dietary regimen for other reasonCMS: Patient's noncompl with dietary regimen for other reason | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.119 | Patient's noncompliance with dietary regimen due to unspecified reasonCMS: Patient's noncompl with dietary regimen due to unsp reason | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.12 Patient's intentional underdosing of medication regimen | ||||
| Z91.120 | Patient's intentional underdosing of medication regimen due to financial hardshipCMS: Pt intentl undrdose of meds regimen due to financl hardship | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.128 | Patient's intentional underdosing of medication regimen for other reasonCMS: Patient's intentl undrdose of meds regimen for oth reason | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.13 Patient's unintentional underdosing of medication regimen | ||||
| Z91.130 | Patient's unintentional underdosing of medication regimen due to age-related debilityCMS: Pt unintent undrdose of meds regimen due to age-rel debility | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.138 | Patient's unintentional underdosing of medication regimen for other reasonCMS: Patient's unintent undrdose of meds regimen for oth reason | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.14 Patient's other noncompliance with medication regimen | ||||
| Z91.141 | Patient's other noncompliance with medication regimen due to financial hardshipCMS: Pt other noncompl with meds regimen due to financl hardship | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.148 | Patient's other noncompliance with medication regimen for other reasonCMS: Patient's other noncompl with meds regimen for other reason | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.15 Patient's noncompliance with renal dialysis | ||||
| Z91.151 | Patient's noncompliance with renal dialysis due to financial hardshipCMS: Pt noncompl with renal dialysis due to financl hardship | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.158 | Patient's noncompliance with renal dialysis for other reason | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.19 Patient's noncompliance with other medical treatment and regimen | ||||
| Z91.190 | Patient's noncompliance with other medical treatment and regimen due to financial hardshipCMS: Pt noncompl w oth med trtmt and regimen d/t financl hardship | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.198 | Patient's noncompliance with other medical treatment and regimen for other reasonCMS: Pt noncompl with other med trtmt and regimen for other rsn | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.199 | Patient's noncompliance with other medical treatment and regimen due to unspecified reasonCMS: Pt noncompl with other med trtmt and regimen d/t unsp reason | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.A Caregiver's noncompliance with patient's medical treatment and regimen | ||||
| Z91.A1 Caregiver's noncompliance with patient's dietary regimen | ||||
| Z91.A10 | Caregiver's noncompliance with patient's dietary regimen due to financial hardshipCMS: Carers noncompl with pt diet regimen due to financl hardship | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.A18 | Caregiver's noncompliance with patient's dietary regimen for other reasonCMS: Carers noncompl with pt dietary regimen for other reason | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.A2 Caregiver's intentional underdosing of patient's medication regimen | ||||
| Z91.A20 | Caregiver's intentional underdosing of patient's medication regimen due to financial hardshipCMS: Carers intentl undrdose pt meds regimen d/t financl hardship | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.A28 | Caregiver's intentional underdosing of medication regimen for other reasonCMS: Carers intentl undrdose of meds regimen for other reason | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.A3 | Caregiver's unintentional underdosing of patient's medication regimenCMS: Carers unintent underdosing of patient's medication regimen | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.A4 Caregiver's other noncompliance with patient's medication regimen | ||||
| Z91.A41 | Caregiver's other noncompliance with patient's medication regimen due to financial hardshipCMS: Carers other noncompl with pt meds regimen due to fin hrdshp | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.A48 | Caregiver's other noncompliance with patient's medication regimen for other reasonCMS: Carers other noncompl with pt meds regimen for other reason | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.A5 Caregiver's noncompliance with patient's renal dialysis | ||||
| Z91.A51 | Caregiver's noncompliance with patient's renal dialysis due to financial hardshipCMS: Carers noncompl with pt renal dialysis due to fin hrdshp | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.A58 | Caregiver's noncompliance with patient's renal dialysis for other reasonCMS: Carers noncompl with pt renal dialysis for other reason | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.A9 Caregiver's noncompliance with patient's other medical treatment and regimen | ||||
| Z91.A91 | Caregiver's noncompliance with patient's other medical treatment and regimen due to financial hardshipCMS: Carers noncompl w pt oth med trtmt & regimen d/t fin hrdshp | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.A98 | Caregiver's noncompliance with patient's other medical treatment and regimen for other reasonCMS: Carers noncompl w pt oth med trtmt and regimen for oth rsn | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.4 Personal history of psychological trauma, not elsewhere classified | ||||
| Z91.41 Personal history of adult abuse | ||||
| Z91.410 | Personal history of adult physical and sexual abuse | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.411 | Personal history of adult psychological abuse | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.412 | Personal history of adult neglect | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.413 | Personal history of adult financial abuse | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.414 | Personal history of adult intimate partner abuse | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.419 | Personal history of unspecified adult abuse | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.42 | Personal history of forced labor or sexual exploitation | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.49 | Other personal history of psychological trauma, not elsewhere classifiedCMS: Oth personal history of psychological trauma, NEC | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.5 Personal history of self-harm | ||||
| Z91.51 | Personal history of suicidal behavior | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.52 | Personal history of nonsuicidal self-harm | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.8 Other specified personal risk factors, not elsewhere classified | ||||
| Z91.81 | History of falling | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.82 | Personal history of military deployment | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.83 | Wandering in diseases classified elsewhere | Cannot lead a claimManifestation code is not reportable as principal diagnosis | None | None |
| Z91.84 Oral health risk factors | ||||
| Z91.841 | Risk for dental caries, low | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.842 | Risk for dental caries, moderate | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.843 | Risk for dental caries, high | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.849 | Unspecified risk for dental caries | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.85 | Personal history of military service | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
| Z91.89 | Other specified personal risk factors, not elsewhere classifiedCMS: Oth personal risk factors, not elsewhere classified | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| Z91.B | Personal risk factor of exposure to diethylstilbestrol | Cannot lead a claimUnacceptable principal diagnosis, code is not reportable as principal diagnosis | None | None |
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.
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