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ICD-10-CM 2027

ICD-10 code for Immunocytoma

C83.0

Small cell B-cell lymphoma

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Immunocytoma”. Page updated September 29, 2026.

About coding Immunocytoma

The ICD-10-CM code for Immunocytoma is C83.0 (Small cell B-cell lymphoma).

Within C83 (non-follicular lymphoma), C83.0 is specifically for small cell B-cell lymphoma. Related codes cover Mantle cell lymphoma (C83.1), diffuse large B-cell lymphoma (C83.3), lymphoblastic (diffuse) lymphoma (C83.5), Burkitt lymphoma (C83.7), other non-follicular lymphoma (C83.8) and non-follicular (diffuse) lymphoma, unspecified (C83.9).

To report this condition, pick the subcode that matches the documentation: C83.00 (unspecified site), C83.01 (lymph nodes of head, face, and neck), C83.02 (intrathoracic lymph nodes), C83.03 (intra-abdominal lymph nodes), C83.04 (lymph nodes of axilla and upper limb), C83.05 (lymph nodes of inguinal region and lower limb), C83.06 (intrapelvic lymph nodes), C83.07 (spleen) and 3 more.

Don't report C83.0 together with the conditions in its Excludes1 note: chronic lymphocytic leukemia (C91.1), mature T/NK-cell lymphomas (C84.-) and Waldenström macroglobulinemia (C88.00).

Don't confuse with (Excludes1 for C83.0)

  • chronic lymphocytic leukemia (C91.1)
  • mature T/NK-cell lymphomas (C84.-)
  • Waldenström macroglobulinemia (C88.00)

Common questions about Immunocytoma ICD-10 codes

What is the ICD-10 code for Immunocytoma?

C83.0 — Small cell B-cell lymphoma (a header code; report a more specific subcode).

Is C83.0 billable?

No. C83.0 is a header code. Report one of its more specific subcodes instead.