ICD-10 · PDGM grouping
T70 Effects of air pressure and water pressure
All 24 codes in the T70 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.
Codes in family
24
Can lead a claim
24
Cannot lead a claim
0
What CMS assigns to T70
All 24 codes group to MMTA - Other. None of the 24 is assigned a comorbidity subgroup. Every code can lead a claim.
Every code in T70
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 |
|---|---|---|---|---|
| T70.0 Otitic barotrauma | ||||
| T70.0XXA | Otitic barotrauma, initial encounter | Can lead a claim | A | None |
| T70.0XXD | Otitic barotrauma, subsequent encounter | Can lead a claim | A | None |
| T70.0XXS | Otitic barotrauma, sequela | Can lead a claim | A | None |
| T70.1 Sinus barotrauma | ||||
| T70.1XXA | Sinus barotrauma, initial encounter | Can lead a claim | A | None |
| T70.1XXD | Sinus barotrauma, subsequent encounter | Can lead a claim | A | None |
| T70.1XXS | Sinus barotrauma, sequela | Can lead a claim | A | None |
| T70.2 Other and unspecified effects of high altitude | ||||
| T70.20 Unspecified effects of high altitude | ||||
| T70.20XA | Unspecified effects of high altitude, initial encounter | Can lead a claim | A | None |
| T70.20XD | Unspecified effects of high altitude, subsequent encounter | Can lead a claim | A | None |
| T70.20XS | Unspecified effects of high altitude, sequela | Can lead a claim | A | None |
| T70.29 Other effects of high altitude | ||||
| T70.29XA | Other effects of high altitude, initial encounter | Can lead a claim | A | None |
| T70.29XD | Other effects of high altitude, subsequent encounter | Can lead a claim | A | None |
| T70.29XS | Other effects of high altitude, sequela | Can lead a claim | A | None |
| T70.3 Caisson disease [decompression sickness] | ||||
| T70.3XXA | Caisson disease [decompression sickness], initial encounter | Can lead a claim | A | None |
| T70.3XXD | Caisson disease [decompression sickness], subsequent encounterCMS: Caisson disease, subsequent encounter | Can lead a claim | A | None |
| T70.3XXS | Caisson disease [decompression sickness], sequela | Can lead a claim | A | None |
| T70.4 Effects of high-pressure fluids | ||||
| T70.4XXA | Effects of high-pressure fluids, initial encounter | Can lead a claim | A | None |
| T70.4XXD | Effects of high-pressure fluids, subsequent encounter | Can lead a claim | A | None |
| T70.4XXS | Effects of high-pressure fluids, sequela | Can lead a claim | A | None |
| T70.8 Other effects of air pressure and water pressure | ||||
| T70.8XXA | Other effects of air pressure and water pressure, initial encounterCMS: Oth effects of air pressure and water pressure, init encntr | Can lead a claim | A | None |
| T70.8XXD | Other effects of air pressure and water pressure, subsequent encounterCMS: Oth effects of air pressure and water pressure, subs encntr | Can lead a claim | A | None |
| T70.8XXS | Other effects of air pressure and water pressure, sequela | Can lead a claim | A | None |
| T70.9 Effect of air pressure and water pressure, unspecified | ||||
| T70.9XXA | Effect of air pressure and water pressure, unspecified, initial encounterCMS: Effect of air pressure and water pressure, unsp, init encntr | Can lead a claim | A | None |
| T70.9XXD | Effect of air pressure and water pressure, unspecified, subsequent encounterCMS: Effect of air pressure and water pressure, unsp, subs encntr | Can lead a claim | A | None |
| T70.9XXS | Effect of air pressure and water pressure, unspecified, sequelaCMS: Effect of air pressure and water pressure, unsp, sequela | Can lead a claim | A | 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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