ICD-10 · PDGM grouping
O70 Perineal laceration during delivery
All 9 codes in the O70 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
9
Cannot lead a claim
0
What CMS assigns to O70
All 9 codes group to MMTA - Other. None of the 9 is assigned a comorbidity subgroup. Every code can lead a claim.
Every code in O70
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 |
|---|---|---|---|---|
| O70.0 | First degree perineal laceration during delivery | Can lead a claim | A | None |
| O70.1 | Second degree perineal laceration during delivery | Can lead a claim | A | None |
| O70.2 Third degree perineal laceration during delivery | ||||
| O70.20 | Third degree perineal laceration during delivery, unspecifiedCMS: Third degree perineal laceration during delivery, unsp | Can lead a claim | A | None |
| O70.21 | Third degree perineal laceration during delivery, IIIa | Can lead a claim | A | None |
| O70.22 | Third degree perineal laceration during delivery, IIIb | Can lead a claim | A | None |
| O70.23 | Third degree perineal laceration during delivery, IIIc | Can lead a claim | A | None |
| O70.3 | Fourth degree perineal laceration during delivery | Can lead a claim | A | None |
| O70.4 | Anal sphincter tear complicating delivery, not associated with third degree lacerationCMS: Anal sphincter tear comp del, not assoc w third degree lac | Can lead a claim | A | None |
| O70.9 | Perineal laceration during delivery, unspecified | Can lead a claim | A | 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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