ICD-10 · PDGM grouping
A49 Bacterial infection of unspecified site
All 7 codes in the A49 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
7
Can lead a claim
0
Cannot lead a claim
7
What CMS assigns to A49
None of the 7 codes is assigned a clinical group. None of the 7 is assigned a comorbidity subgroup. None can lead a claim.
Every code in A49
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 |
|---|---|---|---|---|
| A49.0 Staphylococcal infection, unspecified site | ||||
| A49.01 | Methicillin susceptible Staphylococcus aureus infection, unspecified siteCMS: Methicillin suscep staph infection, unsp site | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| A49.02 | Methicillin resistant Staphylococcus aureus infection, unspecified siteCMS: Methicillin resis staph infection, unsp site | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| A49.1 | Streptococcal infection, unspecified site | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| A49.2 | Hemophilus influenzae infection, unspecified site | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| A49.3 | Mycoplasma infection, unspecified site | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| A49.8 | Other bacterial infections of unspecified site | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| A49.9 | Bacterial infection, unspecified | 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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