ICD-10 · PDGM grouping
P23 Congenital pneumonia
All 9 codes in the P23 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
9
Can lead a claim
8
Cannot lead a claim
1
What CMS assigns to P23
8 of the 9 codes group to MMTA - Other; 1 is assigned no clinical group. None of the 9 is assigned a comorbidity subgroup. 8 of the 9 can lead a claim.
Every code in P23
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 |
|---|---|---|---|---|
| P23.0 | Congenital pneumonia due to viral agent | Can lead a claim | A | None |
| P23.1 | Congenital pneumonia due to Chlamydia | Can lead a claim | A | None |
| P23.2 | Congenital pneumonia due to staphylococcus | Can lead a claim | A | None |
| P23.3 | Congenital pneumonia due to streptococcus, group B | Can lead a claim | A | None |
| P23.4 | Congenital pneumonia due to Escherichia coli | Can lead a claim | A | None |
| P23.5 | Congenital pneumonia due to Pseudomonas | Can lead a claim | A | None |
| P23.6 | Congenital pneumonia due to other bacterial agents | Can lead a claim | A | None |
| P23.8 | Congenital pneumonia due to other organisms | Can lead a claim | A | None |
| P23.9 | Congenital pneumonia, 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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