ICD-10 · PDGM grouping
J70 Respiratory conditions due to other external agents
All 8 codes in the J70 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
8
Can lead a claim
5
Cannot lead a claim
3
What CMS assigns to J70
5 of the 8 codes group to MMTA - Respiratory; 3 are assigned no clinical group. None of the 8 is assigned a comorbidity subgroup. 5 of the 8 can lead a claim. CMS attaches a code-first note to 3 of the 8.
Code first
CMS grouper convention 8, on J70.8, J70.9. Code first:
- , if applicable, toxic effects of substances chiefly nonmedicinal as to source (T51-T65)
CMS grouper convention 88, on J70.5. Code first:
- smoke inhalation (T59.81-)
Every code in J70
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 |
|---|---|---|---|---|
| J70.0 | Acute pulmonary manifestations due to radiation | Can lead a claim | L | None |
| J70.1 | Chronic and other pulmonary manifestations due to radiation | Can lead a claim | L | None |
| J70.2 | Acute drug-induced interstitial lung disorders | Can lead a claim | L | None |
| J70.3 | Chronic drug-induced interstitial lung disorders | Can lead a claim | L | None |
| J70.4 | Drug-induced interstitial lung disorders, unspecified | Can lead a claim | L | None |
| J70.5 | Respiratory conditions due to smoke inhalation | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| J70.8 | Respiratory conditions due to other specified external agentsCMS: Respiratory conditions due to oth external agents | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| J70.9 | Respiratory conditions due to unspecified external agent | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | 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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