C83.51 Lymphoblastic (diffuse) 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 C83 Non-follicular lymphoma

Excludes1 (never code together)

• personal history of non-Hodgkin lymphoma (Z85.72)

Applies from C83.5 Lymphoblastic (diffuse) lymphoma

Applicable to

• B-precursor lymphoma
• Lymphoblastic B-cell lymphoma
• Lymphoblastic lymphoma NOS
• Lymphoblastic T-cell lymphoma
• T-precursor lymphoma

Risk adjustment (HCC)

• CMS-HCC V28: HCC 20 — Lung and Other Severe 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)

• 200.11 Lymphosarcoma, lymph nodes of head, face, and neck (approximate)

Code annotations containing back-references to C83.51

Back-references to C83

• 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

• C83.390 Primary central nervous system lymphoma
• C83.398 Diffuse large B-cell lymphoma of other extranodal and solid organ sites
• C83.3A Diffuse large B-cell lymphoma, in remission
• C83.5 Lymphoblastic (diffuse) lymphoma
• C83.50 Lymphoblastic (diffuse) lymphoma, unspecified site
• C83.51 Lymphoblastic (diffuse) lymphoma, lymph nodes of head, face, and neck (this code)
• C83.52 Lymphoblastic (diffuse) lymphoma, intrathoracic lymph nodes
• C83.53 Lymphoblastic (diffuse) lymphoma, intra-abdominal lymph nodes
• C83.54 Lymphoblastic (diffuse) lymphoma, lymph nodes of axilla and upper limb
• C83.55 Lymphoblastic (diffuse) lymphoma, lymph nodes of inguinal region and lower limb
• C83.56 Lymphoblastic (diffuse) lymphoma, intrapelvic lymph nodes