C20 – Malignant neoplasm of rectum

ICD-10-CM 2027 diagnosis code · Malignant neoplasms of digestive organs

Billable code

ICD-10-CM code C20
Code
C20 (claims format: C20)
Description
Malignant neoplasm of rectum
Billable
Yes – valid for HIPAA-covered transactions
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
2. Neoplasms (C00-D49)
Block
C15-C26 Malignant neoplasms of digestive organs

Notes for C20

Applicable to:
  • Malignant neoplasm of rectal ampulla
Excludes1 (not coded here):
  • malignant carcinoid tumor of the rectum (C7A.026)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block C15-C26

Excludes1 (not coded here):
  • Kaposi's sarcoma of gastrointestinal sites (C46.4)
Excludes2 (not included here):
  • gastrointestinal stromal tumors (C49.A-)

Frequently asked questions

What is ICD-10 code C20?

C20 is the ICD-10-CM code for malignant neoplasm of rectum, in the block C15-C26 (Malignant neoplasms of digestive organs).

Is C20 a billable code?

Yes. C20 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.