C85.11
Unspecified B-cell lymphoma, lymph nodes of head, face, and neck
Billable FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 10 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 2 never code together
Instructional notes 9
C85.1code
Notes
- If B-cell lineage or involvement is mentioned in conjunction with a specific lymphoma, code to the more specific description.
C00-D49chapter
Notes
- Functional activity
- All neoplasms are classified in this chapter, whether they are functionally active or not. An additional code from Chapter 4 may be used, to identify functional activity associated with any neoplasm.
- Morphology [Histology]
- Chapter 2 classifies neoplasms primarily by site (topography), with broad groupings for behavior, malignant, in situ, benign, etc. The Table of Neoplasms should be used to identify the correct topography code. In a few cases, such as for malignant melanoma and certain neuroendocrine tumors, the morphology (histologic type) is included in the category and codes.
- Primary malignant neoplasms overlapping site boundaries
- A primary malignant neoplasm that overlaps two or more contiguous (next to each other) sites should be classified to the subcategory/code .8 ('overlapping lesion'), unless the combination is specifically indexed elsewhere. For multiple neoplasms of the same site that are not contiguous, such as tumors in different quadrants of the same breast, codes for each site should be assigned.
- Malignant neoplasm of ectopic tissue
- Malignant neoplasms of ectopic tissue are to be coded to the site mentioned, e.g., ectopic pancreatic malignant neoplasms are coded to pancreas, unspecified (C25.9).C25.9
Alongside this code 10 same parent — C85.1
C85.10 Unspecified B-cell lymphoma, unspecified site C85.12 Unspecified B-cell lymphoma, intrathoracic lymph nodes C85.13 Unspecified B-cell lymphoma, intra-abdominal lymph nodes C85.14 Unsp B-cell lymphoma, lymph nodes of axilla and upper limb C85.15 Unsp B-cell lymphoma, nodes of ing region and lower limb C85.16 Unspecified B-cell lymphoma, intrapelvic lymph nodes C85.17 Unspecified B-cell lymphoma, spleen C85.18 Unspecified B-cell lymphoma, lymph nodes of multiple sites C85.19 Unsp B-cell lymphoma, extranodal and solid organ sites C85.1A Unspecified B-cell lymphoma, in remission
Medications 1
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.