C83.91
BillableNon-follicular (diffuse) lymphoma, unspecified, lymph nodes of head, face, and neck
HCC Category Mapping
V28HCC 21 — Breast, Prostate, Colorectal and Other Cancers and Tumors
0.545V24HCC 10 — Lymphoma and Other Cancers
0.675ESRDHCC 10 — Lymphoma and Other Cancers
0.000RxHCCHCC 21 — Hodgkin Lymphoma and Other Cancers
0.000What This Code Means
A type of blood cancer (non-follicular lymphoma) affecting the lymph nodes in the head, face, and neck region.
Coding Tips
- •Confirm involvement is limited to head, face, and neck lymph nodes
- •Document if disease is unilateral or bilateral for clinical staging purposes
Clinical Significance
Non-follicular (diffuse) lymphoma, unspecified type, of the head, face, and neck lymph nodes captures disease where the anatomic site is known but the specific non-follicular subtype has not been determined. Head and neck lymphadenopathy is often the initial presenting sign of lymphoma, making prompt biopsy and subtype identification important for treatment planning. This code should trigger a query for pathologic subtype clarification.
Documentation Requirements
- ✓Imaging or physical exam confirming head, face, or neck lymph node involvement
- ✓Pathology report — query for specific non-follicular subtype if not documented
- ✓Distinction between non-follicular lymphoma and other causes of cervical lymphadenopathy
- ✓Treatment plan and staging documentation
- ✓Disease status — active, in treatment, or surveillance
Commonly Confused Codes
C83.81 — Other non-follicular lymphoma, head/face/neck: C83.81 is for a known 'other' subtype; C83.91 is for unspecified subtype at this siteC83.31 — Diffuse large B-cell lymphoma, head/face/neck: Use when pathology confirms diffuse large B-cell subtypeC85.11 — Unspecified B-cell lymphoma, head/face/neck: Use when only B-cell lineage is confirmed without further typing
Code Hierarchy
└C83Non-follicular lymphoma└C83.9Non-follicular (diffuse) lymphoma, unspecified└C83.91Non-follicular (diffuse) lymphoma, unspecified, lymph nodes of head, face, and neck
└C83.91Non-follicular (diffuse) lymphoma, unspecified, lymph nodes of head, face, and neck