Is C78.6 a billable ICD-10-CM code?

Yes. C78.6 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does C78.6 sit in the tabular list?

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

C78.6

C78.6 — Secondary malignant neoplasm of retroperitoneum and peritoneum

Billable / specific codeICD-10-CM

C78.6 is a billable, specific ICD-10-CM code for secondary malignant neoplasm of retroperitoneum and peritoneum. It is valid for submission on a claim.

Risk adjustment

C78.6 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 17 Cancer Metastatic to Lung, Liver, Brain, and Other Organs; Acute Myeloid Leukemia Except Promyelocytic4.209 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

C78.6 is named in 54 Medicare coverage policies — 54 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A52453Billing and Coding: Luteinizing Hormone-Releasing Hormone (LHRH) Analogs
A52453Billing and Coding: Luteinizing Hormone-Releasing Hormone (LHRH) Analogs
A52453Billing and Coding: Luteinizing Hormone-Releasing Hormone (LHRH) Analogs
A52453Billing and Coding: Luteinizing Hormone-Releasing Hormone (LHRH) Analogs

How C78.6 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to C78.6.

Pseudomyxoma peritonei
Carcinomatosis›peritonei

Related codes at this level

Codes that share C78. If C78.6 is not quite right, the correct code is usually one of these.

Questions about C78.6

Is C78.6 a billable ICD-10-CM code?: Yes. C78.6 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does C78.6 sit in the tabular list?: Neoplasms (C00-D49), in the block Malignant neoplasms of ill-defined, other secondary and unspecified sites (C76-C80).