C00 — Malignant neoplasm of lip

Not billable

Is C00 billable?

No — C00 is a non-billable header code. C00 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 9 billable codes beneath C00.

Billable codes under this header

C00 at a glance

Code	C00
Description	Malignant neoplasm of lip
Billable	No — header code
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Excludes1 — never code together

The conditions below can never be reported together with C00 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

malignant melanoma of lip (C43.0)
Merkel cell carcinoma of lip (C4A.0)
other and unspecified malignant neoplasm of skin of lip (C44.0-)

Use additional code

Report an additional code alongside C00 to fully describe the condition. C00 is sequenced first.

code to identify:
alcohol abuse and dependence (F10.-)
history of tobacco dependence (Z87.891)
tobacco dependence (F17.-)
tobacco use (Z72.0)

What codes fall under C00? (9)

How long has C00 existed?

C00 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which codes are confused with C00?

ICD-10-CM declares these codes mutually exclusive with C00 — exactly one of each pair can be correct for a given encounter.