ICD-10 · PDGM grouping
C90 Multiple myeloma and malignant plasma cell neoplasms
All 12 codes in the C90 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
12
Cannot lead a claim
0
What CMS assigns to C90
All 12 codes group to MMTA - Infectious Disease, Neoplasms, and Blood-Forming Diseases. All 12 count toward the Follicular and Other Non-Hodgkin’s Lymphoma, and Leukemia comorbidity subgroup. Every code can lead a claim.
- Follicular and Other Non-Hodgkin’s Lymphoma, and Leukemia
Every code in C90
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 |
|---|---|---|---|---|
| C90.0 Multiple myeloma | ||||
| C90.00 | Multiple myeloma not having achieved remission | Can lead a claim | K | Follicular and Other Non-Hodgkin’s Lymphoma, and Leukemia |
| C90.01 | Multiple myeloma in remission | Can lead a claim | K | Follicular and Other Non-Hodgkin’s Lymphoma, and Leukemia |
| C90.02 | Multiple myeloma in relapse | Can lead a claim | K | Follicular and Other Non-Hodgkin’s Lymphoma, and Leukemia |
| C90.1 Plasma cell leukemia | ||||
| C90.10 | Plasma cell leukemia not having achieved remission | Can lead a claim | K | Follicular and Other Non-Hodgkin’s Lymphoma, and Leukemia |
| C90.11 | Plasma cell leukemia in remission | Can lead a claim | K | Follicular and Other Non-Hodgkin’s Lymphoma, and Leukemia |
| C90.12 | Plasma cell leukemia in relapse | Can lead a claim | K | Follicular and Other Non-Hodgkin’s Lymphoma, and Leukemia |
| C90.2 Extramedullary plasmacytoma | ||||
| C90.20 | Extramedullary plasmacytoma not having achieved remission | Can lead a claim | K | Follicular and Other Non-Hodgkin’s Lymphoma, and Leukemia |
| C90.21 | Extramedullary plasmacytoma in remission | Can lead a claim | K | Follicular and Other Non-Hodgkin’s Lymphoma, and Leukemia |
| C90.22 | Extramedullary plasmacytoma in relapse | Can lead a claim | K | Follicular and Other Non-Hodgkin’s Lymphoma, and Leukemia |
| C90.3 Solitary plasmacytoma | ||||
| C90.30 | Solitary plasmacytoma not having achieved remission | Can lead a claim | K | Follicular and Other Non-Hodgkin’s Lymphoma, and Leukemia |
| C90.31 | Solitary plasmacytoma in remission | Can lead a claim | K | Follicular and Other Non-Hodgkin’s Lymphoma, and Leukemia |
| C90.32 | Solitary plasmacytoma in relapse | Can lead a claim | K | Follicular and Other Non-Hodgkin’s Lymphoma, and Leukemia |
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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