ICD-10 · PDGM grouping
A36 Diphtheria
All 12 codes in the A36 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
12
Can lead a claim
12
Cannot lead a claim
0
What CMS assigns to A36
All 12 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases. None of the 12 is assigned a comorbidity subgroup. Every code can lead a claim.
Every code in A36
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 |
|---|---|---|---|---|
| A36.0 | Pharyngeal diphtheria | Can lead a claim | K | None |
| A36.1 | Nasopharyngeal diphtheria | Can lead a claim | K | None |
| A36.2 | Laryngeal diphtheria | Can lead a claim | K | None |
| A36.3 | Cutaneous diphtheria | Can lead a claim | K | None |
| A36.8 Other diphtheria | ||||
| A36.81 | Diphtheritic cardiomyopathy | Can lead a claim | K | None |
| A36.82 | Diphtheritic radiculomyelitis | Can lead a claim | K | None |
| A36.83 | Diphtheritic polyneuritis | Can lead a claim | K | None |
| A36.84 | Diphtheritic tubulo-interstitial nephropathy | Can lead a claim | K | None |
| A36.85 | Diphtheritic cystitis | Can lead a claim | K | None |
| A36.86 | Diphtheritic conjunctivitis | Can lead a claim | K | None |
| A36.89 | Other diphtheritic complications | Can lead a claim | K | None |
| A36.9 | Diphtheria, unspecified | Can lead a claim | K | 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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