C85.11 Unspecified B-cell lymphoma, lymph nodes of head, face, and neck

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from C85 Other specified and unspecified types of non-Hodgkin lymphoma

Excludes1 (never code together)

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

Applies from C85.1 Unspecified B-cell lymphoma

Notes

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

Risk adjustment (HCC)

• CMS-HCC V28: HCC 21 — Lymphoma and Other Cancers
• CMS-HCC V22: HCC 10 — Lymphoma and Other Cancers
• RxHCC V08: HCC 21 — Lymphomas and Other Hematologic Cancers
• ESRD V24: HCC 10

MS-DRG index

Defines the logic of DRG(s) 011-013 in MDC PRE.

Approximate ICD-9-CM (GEMs)

• 202.81 Other malignant lymphomas, lymph nodes of head, face, and neck (approximate)

Code annotations containing back-references to C85.11

Back-references to C85.1

• Type 1 Excludes: C88 Malignant immunoproliferative diseases and certain other B-cell lymphomas ("B-cell lymphoma, unspecified (C85.1-)")

Back-references to C85

• Type 1 Excludes: C26.1 Malignant neoplasm of spleen ("non-Hodgkin lymphoma (C82-C85)")
• Type 1 Excludes: C76 Malignant neoplasm of other and ill-defined sites ("malignant neoplasm of lymphoid, hematopoietic and related tissue (C81-C96)")
• Type 1 Excludes: C77 Secondary and unspecified malignant neoplasm of lymph nodes ("malignant neoplasm of lymph nodes, specified as primary (C81-C86, C88, C96.-)")
• Code Also: D47.02 Systemic mastocytosis ("non-Hodgkin lymphoma (C82-C85)")
• Code First: Z15.0 Genetic susceptibility to malignant neoplasm (", if applicable, any current malignant neoplasm (C00-C75, C81-C96)")

Nearby codes

• C85 Other specified and unspecified types of non-Hodgkin lymphoma
• C85.1 Unspecified B-cell lymphoma
• C85.10 Unspecified B-cell lymphoma, unspecified site
• C85.11 Unspecified B-cell lymphoma, lymph nodes of head, face, and neck (this code)
• C85.12 Unspecified B-cell lymphoma, intrathoracic lymph nodes
• C85.13 Unspecified B-cell lymphoma, intra-abdominal lymph nodes
• C85.14 Unspecified B-cell lymphoma, lymph nodes of axilla and upper limb
• C85.15 Unspecified B-cell lymphoma, lymph nodes of inguinal region and lower limb
• C85.16 Unspecified B-cell lymphoma, intrapelvic lymph nodes