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D12.3

D12.3: Benign neoplasm of transverse colon

Billable / specific codeICD-10-CM

D12.3 is a billable, specific ICD-10-CM code for benign neoplasm of transverse colon. It is valid for submission on a claim.

Check D12.3 with the rest of the claim: free scrubber

Inclusion terms

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

  • Benign neoplasm of hepatic flexure
  • Benign neoplasm of splenic flexure

Excludes2 inherited from the categories above D12.3

Not part of this code, but both may be coded when both are present.

Written on D12: Benign neoplasm of colon, rectum, anus and anal canal

  • benign carcinoid tumors of the large intestine and rectum (D3A.02-)
  • polyp of colon NOS (K63.5)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

D12.3 is named in 16 Medicare coverage policies: 16 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A55937Billing and Coding: Diagnostic Colonoscopy
  • A56394Billing and Coding: Colonoscopy and Sigmoidoscopy-Diagnostic
  • A56421Billing and Coding: CT of the Abdomen and Pelvis
  • A56456Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy

Alphabetic index entries that lead here

  • Polyp, polypus›colon›adenomatous›transverse

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under D12

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.