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C85.1

C85.1: Unspecified B-cell lymphoma

Non-billable headerICD-10-CM

C85.1 is a non-billable header ICD-10-CM code for unspecified b-cell lymphoma. It cannot be billed on its own: choose one of the more specific child codes below.

Notes

Additional guidance from the ICD-10-CM tabular list.

  • If B-cell lineage or involvement is mentioned in conjunction with a specific lymphoma, code to the more specific description.

Excludes1 inherited from the categories above C85.1

A category’s note binds every code beneath it.

Written on C85: Other specified and unspecified types of non-Hodgkin lymphoma

  • other specified types of T/NK-cell lymphoma (C86.-)
  • personal history of non-Hodgkin lymphoma (Z85.72)

Other codes that can never be billed with C85.1

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • C88Malignant immunoproliferative diseases and certain other B-cell lymphomas

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead C85.1

11 child codes. Green means billable.

Other codes under C85

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.