C84.65 — Anaplastic large cell lymphoma, ALK-positive, lymph nodes of inguinal region and lower limb
C84.65 is a billable, specific ICD-10-CM code for anaplastic large cell lymphoma, alk-positive, lymph nodes of inguinal region and lower limb. It is valid for submission on a claim.
Excludes1 inherited from the categories above C84.65
These are not written on C84.65, but they bind it: a note on a category applies to every code beneath it. Billing C84.65 with anything listed here is a denial.
Other codes that can never be billed with C84.65
These codes carry an Excludes1 note pointing at C84.65. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C84.65 alone.
Risk adjustment
C84.65 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 20 Lung and Other Severe Cancers1.136 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
C84.65 is named in 55 Medicare coverage policies — 55 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52479Oral Anticancer Drugs - Policy Article
- A52479Oral Anticancer Drugs - Policy Article
- A52479Oral Anticancer Drugs - Policy Article
- A52479Oral Anticancer Drugs - Policy Article
Code history
C84.65 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share C84.6. If C84.65 is not quite right, the correct code is usually one of these.
- C84.60Anaplastic large cell lymphoma, ALK-positive, unspecified site
- C84.61Anaplastic large cell lymphoma, ALK-positive, lymph nodes of head, face, and neck
- C84.62Anaplastic large cell lymphoma, ALK-positive, intrathoracic lymph nodes
- C84.63Anaplastic large cell lymphoma, ALK-positive, intra-abdominal lymph nodes
- C84.64Anaplastic large cell lymphoma, ALK-positive, lymph nodes of axilla and upper limb
- C84.66Anaplastic large cell lymphoma, ALK-positive, intrapelvic lymph nodes
- C84.67Anaplastic large cell lymphoma, ALK-positive, spleen
- C84.68Anaplastic large cell lymphoma, ALK-positive, lymph nodes of multiple sites
- C84.69Anaplastic large cell lymphoma, ALK-positive, extranodal and solid organ sites
- C84.6AAnaplastic large cell lymphoma, ALK-positive, in remission
Questions about C84.65
- Is C84.65 a billable ICD-10-CM code?
- Yes. C84.65 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does C84.65 sit in the tabular list?
- Neoplasms (C00-D49), in the block Malignant neoplasms of lymphoid, hematopoietic and related tissue (C81-C96).
- What cannot be coded together with C84.65?
- C84.65 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above C84.65 (C84) and apply to it just the same.