Is ICD-10-CM code C01 billable?

Yes, C01 (Malignant neoplasm of base of tongue) is a billable ICD-10-CM diagnosis code, valid for reimbursement on HIPAA-covered transactions for FY2026.

What chapter does ICD-10-CM code C01 belong to?

C01 belongs to Chapter 2 of the ICD-10-CM tabular list: C00–D49 (Neoplasms).

C01

Billable

ChapterC00–D49

Rankcategory

Description

Malignant neoplasm of base of tongue

About ICD-10-CM code C01

C01 is the ICD-10-CM diagnosis code for Malignant neoplasm of base of tongue. It sits in C00-D49 Neoplasms, within Malignant neoplasms of lip, oral cavity and pharynx (C00-C14). As a billable code, C01 can be reported for reimbursement.

Metadata & Insights

•Billable/specific code (valid for reimbursement).
•Chapter 2: Neoplasms (C00-D49).

Instructional Notes

Includes

Malignant neoplasm of dorsal surface of base of tongue
Malignant neoplasm of fixed part of tongue NOS
Malignant neoplasm of posterior third of tongue

Use Additional Code

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

Clinical Hierarchy

BillableHas subcodes

CH2Neoplasms (C00-D49)

C00-C14Malignant neoplasms of lip, oral cavity and pharynx (C00-C14)

C01Malignant neoplasm of base of tongueBillable

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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