C90.20 is the authoritative medical code for Extramedullary plasmacytoma not having achieved remission. This classification is used in medical billing and clinical recording to specify the clinical criteria for extramedullary plasmacytoma not having achieved remission (ICD-10-CM C90.20), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Extramedullary plasmacytoma not having achieved remission is a billable ICD-10-CM diagnosis code C90.20. Inclusion terms: Extramedullary plasmacytoma with failed remission; Extramedullary plasmacytoma NOS. Excludes1 (not coded here): personal history of other malignant neoplasms of lymphoid, hematopoietic and related tissues Z85.79. Excludes2 (not included here): Kaposi's sarcoma of lymph nodes C46.3; secondary and unspecified neoplasm of lymph nodes C77.-; secondary neoplasm of bone marrow C79.52; secondary neoplasm of spleen C78.89.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for C90.20 in the official ICD-10-CM tabular list.
Inclusion Terms
Alternative terms the tabular list files under this code.
- Extramedullary plasmacytoma with failed remission
- Extramedullary plasmacytoma NOS
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- personal history of other malignant neoplasms of lymphoid, hematopoietic and related tissues Z85.79
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- Kaposi's sarcoma of lymph nodes C46.3
- secondary and unspecified neoplasm of lymph nodes C77.-
- secondary neoplasm of bone marrow C79.52
- secondary neoplasm of spleen C78.89
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with C90.20?
Per Excludes1 instructions, C90.20 must not be reported with: personal history of other malignant neoplasms of lymphoid, hematopoietic and related tissues (Z85.79).
Can C90.20 be reported alongside related conditions?
Per Excludes2 instructions, C90.20 and the following may both be reported when both are present: Kaposi's sarcoma of lymph nodes (C46.3); secondary and unspecified neoplasm of lymph nodes (C77.-); secondary neoplasm of bone marrow (C79.52); secondary neoplasm of spleen (C78.89).
What conditions are included under C90.20?
Extramedullary plasmacytoma not having achieved remission includes: Extramedullary plasmacytoma with failed remission; Extramedullary plasmacytoma NOS.
Codes in This Family (16)
Official ICD-10-CM classifications in the same code family as C90.20, with their registry titles.
- C90 — Multiple myeloma and malignant plasma cell neoplasms
- C90.0 — Multiple myeloma
- C90.00 — Multiple myeloma not having achieved remission
- C90.01 — Multiple myeloma in remission
- C90.02 — Multiple myeloma in relapse
- C90.1 — Plasma cell leukemia
- C90.10 — Plasma cell leukemia not having achieved remission
- C90.11 — Plasma cell leukemia in remission
- C90.12 — Plasma cell leukemia in relapse
- C90.2 — Extramedullary plasmacytoma
- C90.21 — Extramedullary plasmacytoma in remission
- C90.22 — Extramedullary plasmacytoma in relapse
- C90.3 — Solitary plasmacytoma
- C90.30 — Solitary plasmacytoma not having achieved remission
- C90.31 — Solitary plasmacytoma in remission
- C90.32 — Solitary plasmacytoma in relapse
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures:
ICD Code C85.20
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ICD Code C86.20
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ICD Code C92.20
Atypical chronic myeloid leukemia, BCR/ABL-negative, not having achieved remission
ICD Code C94.20
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