ICD-10 · PDGM grouping
C40 Malignant neoplasm of bone and articular cartilage of limbs
All 18 codes in the C40 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
18
Can lead a claim
12
Cannot lead a claim
6
What CMS assigns to C40
12 of the 18 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases; 6 are assigned no clinical group. 10 of the 18 count toward the Malignant Neoplasm of Bone and Articular Cartilage comorbidity subgroup; 8 are assigned none. 12 of the 18 can lead a claim.
- Malignant Neoplasm of Bone and Articular Cartilage
Every code in C40
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 |
|---|---|---|---|---|
| C40.0 Malignant neoplasm of scapula and long bones of upper limb | ||||
| C40.00 | Malignant neoplasm of scapula and long bones of unspecified upper limbCMS: Malig neoplasm of scapula and long bones of unsp upper limb | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C40.01 | Malignant neoplasm of scapula and long bones of right upper limbCMS: Malig neoplasm of scapula and long bones of right upper limb | Can lead a claim | K | Malignant Neoplasm of Bone and Articular Cartilage |
| C40.02 | Malignant neoplasm of scapula and long bones of left upper limbCMS: Malig neoplasm of scapula and long bones of left upper limb | Can lead a claim | K | Malignant Neoplasm of Bone and Articular Cartilage |
| C40.1 Malignant neoplasm of short bones of upper limb | ||||
| C40.10 | Malignant neoplasm of short bones of unspecified upper limb | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C40.11 | Malignant neoplasm of short bones of right upper limb | Can lead a claim | K | Malignant Neoplasm of Bone and Articular Cartilage |
| C40.12 | Malignant neoplasm of short bones of left upper limb | Can lead a claim | K | Malignant Neoplasm of Bone and Articular Cartilage |
| C40.2 Malignant neoplasm of long bones of lower limb | ||||
| C40.20 | Malignant neoplasm of long bones of unspecified lower limb | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C40.21 | Malignant neoplasm of long bones of right lower limb | Can lead a claim | K | Malignant Neoplasm of Bone and Articular Cartilage |
| C40.22 | Malignant neoplasm of long bones of left lower limb | Can lead a claim | K | Malignant Neoplasm of Bone and Articular Cartilage |
| C40.3 Malignant neoplasm of short bones of lower limb | ||||
| C40.30 | Malignant neoplasm of short bones of unspecified lower limb | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C40.31 | Malignant neoplasm of short bones of right lower limb | Can lead a claim | K | Malignant Neoplasm of Bone and Articular Cartilage |
| C40.32 | Malignant neoplasm of short bones of left lower limb | Can lead a claim | K | Malignant Neoplasm of Bone and Articular Cartilage |
| C40.8 Malignant neoplasm of overlapping sites of bone and articular cartilage of limb | ||||
| C40.80 | Malignant neoplasm of overlapping sites of bone and articular cartilage of unspecified limbCMS: Malig neoplm of ovrlp sites of bone/artic cartl of unsp limb | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C40.81 | Malignant neoplasm of overlapping sites of bone and articular cartilage of right limbCMS: Malig neoplm of ovrlp sites of bone/artic cartl of r limb | Can lead a claim | K | Malignant Neoplasm of Bone and Articular Cartilage |
| C40.82 | Malignant neoplasm of overlapping sites of bone and articular cartilage of left limbCMS: Malig neoplm of ovrlp sites of bone/artic cartl of left limb | Can lead a claim | K | Malignant Neoplasm of Bone and Articular Cartilage |
| C40.9 Malignant neoplasm of unspecified bones and articular cartilage of limb | ||||
| C40.90 | Malignant neoplasm of unspecified bones and articular cartilage of unspecified limbCMS: Malig neoplasm of unsp bones and artic cartlg of unsp limb | Cannot lead a claimPrincipal diagnosis not assigned to a clinical group | None | None |
| C40.91 | Malignant neoplasm of unspecified bones and articular cartilage of right limbCMS: Malig neoplasm of unsp bones and artic cartlg of right limb | Can lead a claim | K | None |
| C40.92 | Malignant neoplasm of unspecified bones and articular cartilage of left limbCMS: Malig neoplasm of unsp bones and artic cartlg of left limb | 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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