DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

C90 Multiple myeloma and malignant plasma cell neoplasms

  • Header · not billable

C90 is not billable. The category heads 12 billable codes in FY2027, grouped under 4 subdivisions.

Index → code

Where it sits

  1. Chapter 2 Neoplasms (C00-D49)
  2. C81-C96 Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96)
  3. C90 Multiple myeloma and malignant plasma cell neoplasms
Billable codes
12
Subdivisions
4
CC / MCC codes
12 / 0
HCC V28 codes
12
New FY2027
0
Index entries
20

Codes in C90

  1. C90.0
    Multiple myeloma
    Header
    Inclusion terms 4, Excludes1 2

    Inclusion terms

    • Kahler's disease
    • Medullary plasmacytoma
    • Myelomatosis
    • Plasma cell myeloma

    Excludes1

    • solitary myeloma (C90.3-) C90.3
    • solitary plasmactyoma (C90.3-) C90.3
  2. C90.00
    Multiple myeloma not having achieved remission
    BillableCC19
    Inclusion terms 2

    Inclusion terms

    • Multiple myeloma with failed remission
    • Multiple myeloma NOS
  3. C90.01
    Multiple myeloma in remission
    BillableCC19
  4. C90.02
    Multiple myeloma in relapse
    BillableCC19
  5. C90.1
    Plasma cell leukemia
    Header
    Inclusion terms 1

    Inclusion terms

    • Plasmacytic leukemia
  6. C90.10
    Plasma cell leukemia not having achieved remission
    BillableCC19
    Inclusion terms 2

    Inclusion terms

    • Plasma cell leukemia with failed remission
    • Plasma cell leukemia NOS
  7. C90.11
    Plasma cell leukemia in remission
    BillableCC19
  8. C90.12
    Plasma cell leukemia in relapse
    BillableCC19
  9. C90.2
    Extramedullary plasmacytoma
    Header
  10. C90.20
    Extramedullary plasmacytoma not having achieved remission
    BillableCC19
    Inclusion terms 2

    Inclusion terms

    • Extramedullary plasmacytoma with failed remission
    • Extramedullary plasmacytoma NOS
  11. C90.21
    Extramedullary plasmacytoma in remission
    BillableCC19
  12. C90.22
    Extramedullary plasmacytoma in relapse
    BillableCC19
  13. C90.3
    Solitary plasmacytoma
    Header
    Inclusion terms 3

    Inclusion terms

    • Localized malignant plasma cell tumor NOS
    • Plasmacytoma NOS
    • Solitary myeloma
  14. C90.30
    Solitary plasmacytoma not having achieved remission
    BillableCC19
    Inclusion terms 2

    Inclusion terms

    • Solitary plasmacytoma with failed remission
    • Solitary plasmacytoma NOS
  15. C90.31
    Solitary plasmacytoma in remission
    BillableCC19
  16. C90.32
    Solitary plasmacytoma in relapse
    BillableCC19

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

At C90

Excludes1

  • personal history of other malignant neoplasms of lymphoid, hematopoietic and related tissues (Z85.79) Z85.79

Notes that also apply

Block C81-C96 instructions (Excludes2 4): printed on the block page.

Chapter 2 instructions (Notes 8): printed on the chapter 2 page.

Index entries

  • Kahler's disease → C90.0-
  • Myeloma (multiple) → C90.0-
  • Myelomatosis → C90.0-
  • Plasmacytoma → C90.3-
  • Myeloma (multiple)plasma cell → C90.0-
  • Plasmacytomamedullary → C90.0-
  • Leukemia, leukemicplasma cell → C90.1-
  • Leukemia, leukemicplasmacytic → C90.1-
  • Plasmacytomaextramedullary → C90.2-
  • Myeloma (multiple)monostotic → C90.3
  • Myeloma (multiple)solitary → C90.3-
  • Plasmacytomasolitary → C90.3-
  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute)in (due to)multiple myelomatosis → C90.0- [M36.1]
  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute)in (due to)myelomatosis (multiple) → C90.0- [M36.1]
  • Arthropathyin (due to)multiple myeloma → C90.0- [M36.1]
  • Disorder (of)glomerular (in)multiple myeloma → C90.0- [N08]
  • Disorder (of)tubulo-interstitial (in)multiple myeloma → C90.0- [N16]
  • Glomerulonephritisin (due to)multiple myeloma → C90.0- [N08]
  • Myeloma (multiple)monostoticplasma cell → C90.0-
  • Pyelonephritisin (due to)multiple myeloma → C90.0- [N16]

NCHS Alphabetic Index. Index first, then the Tabular List.

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