Is C80.0 a billable ICD-10-CM code?

Yes. C80.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does C80.0 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 C80.0?

C80.0 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 C80.0 (C80) and apply to it just the same.

C80.0

C80.0 — Disseminated malignant neoplasm, unspecified

Billable / specific codeICD-10-CM

C80.0 is a billable, specific ICD-10-CM code for disseminated malignant neoplasm, unspecified. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Carcinomatosis NOS
Generalized cancer, unspecified site (primary) (secondary)
Generalized malignancy, unspecified site (primary) (secondary)

Excludes1 inherited from the categories above C80.0

These are not written on C80.0, but they bind it: a note on a category applies to every code beneath it. Billing C80.0 with anything listed here is a denial.

Written on C80 — Malignant neoplasm without specification of site

malignant carcinoid tumor of unspecified site (C7A.00)
malignant neoplasm of specified multiple sites- code to each site

Other codes that can never be billed with C80.0

These codes carry an Excludes1 note pointing at C80.0. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading C80.0 alone.

C79.9Secondary malignant neoplasm of unspecified site

Risk adjustment

C80.0 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

C80.0 is named in 60 Medicare coverage policies — 60 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A52450Billing and Coding: Paclitaxel (e.g., Taxol®/Abraxane ™)
A52479Oral Anticancer Drugs - Policy Article
A52479Oral Anticancer Drugs - Policy Article
A52479Oral Anticancer Drugs - Policy Article

How C80.0 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 C80.0.

Carcinomatosis
Carcinoma›generalized, with unspecified primary site
Carcinomatosis›unspecified site(primary) (secondary)

Code history

C80.0 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 C80. If C80.0 is not quite right, the correct code is usually one of these.

Questions about C80.0

Is C80.0 a billable ICD-10-CM code?: Yes. C80.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does C80.0 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 C80.0?: C80.0 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 C80.0 (C80) and apply to it just the same.