ICD-10 · PDGM grouping
D05 Carcinoma in situ of breast
All 12 codes in the D05 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
8
Cannot lead a claim
4
What CMS assigns to D05
8 of the 12 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases; 4 are assigned no clinical group. None of the 12 is assigned a comorbidity subgroup. 8 of the 12 can lead a claim.
Every code in D05
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 |
|---|---|---|---|---|
| D05.0 Lobular carcinoma in situ of breast | ||||
| D05.00 | Lobular carcinoma in situ of unspecified breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| D05.01 | Lobular carcinoma in situ of right breast | Can lead a claim | K | None |
| D05.02 | Lobular carcinoma in situ of left breast | Can lead a claim | K | None |
| D05.1 Intraductal carcinoma in situ of breast | ||||
| D05.10 | Intraductal carcinoma in situ of unspecified breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| D05.11 | Intraductal carcinoma in situ of right breast | Can lead a claim | K | None |
| D05.12 | Intraductal carcinoma in situ of left breast | Can lead a claim | K | None |
| D05.8 Other specified type of carcinoma in situ of breast | ||||
| D05.80 | Other specified type of carcinoma in situ of unspecified breastCMS: Oth type of carcinoma in situ of unspecified breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| D05.81 | Other specified type of carcinoma in situ of right breast | Can lead a claim | K | None |
| D05.82 | Other specified type of carcinoma in situ of left breast | Can lead a claim | K | None |
| D05.9 Unspecified type of carcinoma in situ of breast | ||||
| D05.90 | Unspecified type of carcinoma in situ of unspecified breast | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| D05.91 | Unspecified type of carcinoma in situ of right breast | Can lead a claim | K | None |
| D05.92 | Unspecified type of carcinoma in situ of left breast | 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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