ICD-10 · PDGM grouping
A40 Streptococcal sepsis
All 5 codes in the A40 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
5
Can lead a claim
5
Cannot lead a claim
0
What CMS assigns to A40
All 5 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases. All 5 count toward the C-diff, MRSA, E-coli, Sepsis comorbidity subgroup. Every code can lead a claim. CMS attaches a code-first note to all 5.
- C-diff, MRSA, E-coli, Sepsis: counts toward the high comorbidity tier only in an interaction pair.
Code first
CMS grouper convention 1, on all 5 codes. Code first:
- , if applicable, postprocedural sepsis (T81.44-)
- sepsis due to central venous catheter (T80.211-)
- streptococcal sepsis during labor (O75.3)
- streptococcal sepsis following abortion or ectopic or molar pregnancy (O03.37, O03.87, O04.87, O07.37, O08.82)
- streptococcal sepsis following immunization (T88.0-)
- streptococcal sepsis following infusion, transfusion or therapeutic injection (T80.22-, T80.29-)
Every code in A40
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 |
|---|---|---|---|---|
| A40.0 | Sepsis due to streptococcus, group A | Can lead a claim, code first applies | K | C-diff, MRSA, E-coli, Sepsis |
| A40.1 | Sepsis due to streptococcus, group B | Can lead a claim, code first applies | K | C-diff, MRSA, E-coli, Sepsis |
| A40.3 | Sepsis due to Streptococcus pneumoniae | Can lead a claim, code first applies | K | C-diff, MRSA, E-coli, Sepsis |
| A40.8 | Other streptococcal sepsis | Can lead a claim, code first applies | K | C-diff, MRSA, E-coli, Sepsis |
| A40.9 | Streptococcal sepsis, unspecified | Can lead a claim, code first applies | K | C-diff, MRSA, E-coli, Sepsis |
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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