Is C77.5 a billable ICD-10-CM code?

Yes. C77.5 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does C77.5 sit in the tabular list?

Neoplasms (C00-D49), in the block Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80).

What cannot be coded together with C77.5?

C77.5 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 C77.5 (C77) and apply to it just the same.

C77.5

C77.5 — Secondary and unspecified malignant neoplasm of intrapelvic lymph nodes

Billable / specific codeICD-10-CM

C77.5 is a billable, specific ICD-10-CM code for secondary and unspecified malignant neoplasm of intrapelvic lymph nodes. It is valid for submission on a claim.

Excludes1 inherited from the categories above C77.5

These are not written on C77.5, but they bind it: a note on a category applies to every code beneath it. Billing C77.5 with anything listed here is a denial.

Written on C77 — Secondary and unspecified malignant neoplasm of lymph nodes

malignant neoplasm of lymph nodes, specified as primary (C81-C86, C88, C96.-)
mesentery metastasis of carcinoid tumor (C7B.04)
secondary carcinoid tumors of distant lymph nodes (C7B.01)

Risk adjustment

C77.5 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 18 Cancer Metastatic to Bone, Other and Unspecified Metastatic Cancer; Acute Leukemia Except Myeloid2.341 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

C77.5 is named in 45 Medicare coverage policies — 45 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

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A52986Billing and Coding: Biomarkers for Oncology
A53101Billing and Coding: MolDX: bioTheranostics Cancer TYPE ID® Update
A54188Billing and Coding: MolDX: bioTheranostics Cancer TYPE ID®

Code history

C77.5 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 C77. If C77.5 is not quite right, the correct code is usually one of these.

Questions about C77.5

Is C77.5 a billable ICD-10-CM code?: Yes. C77.5 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does C77.5 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80).
What cannot be coded together with C77.5?: C77.5 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 C77.5 (C77) and apply to it just the same.