C83.0

ICD-10Non-billable category

Small cell B-cell lymphoma

Official ICD-10-CM descriptor (FY2026)

Small cell B-cell lymphoma

C83.0 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Inclusion terms

  • Lymphoplasmacytic lymphoma
  • Nodal marginal zone lymphoma
  • Non-leukemic variant of B-CLL
  • Splenic marginal zone lymphoma

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

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

ICD-10-CM FY2026 defines 11 codes beneath C83.0. See the ICD-10-CM index for what this site publishes.

Related codes in C83

Where this code sits

Parent code
C83

Krasyn AI Coder

Get code suggestions automatically as you type notes. Free for 50 analyses.

Install for Chrome — free

Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.

Get codes automatically as you write notes. Krasyn AI Coder for Chrome — free for 50 analyses.Install free →