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D12.6

D12.6Benign neoplasm of colon, unspecified

Billable / specific codeICD-10-CM

D12.6 is a billable, specific ICD-10-CM code for benign neoplasm of colon, unspecified. It is valid for submission on a claim.

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

  • inflammatory polyp of colon (K51.4-)

Inclusion terms

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

  • Adenomatosis of colon
  • Benign neoplasm of large intestine NOS
  • Polyposis (hereditary) of colon

Risk adjustment

D12.6 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

D12.6 is named in 11 Medicare coverage policies 11 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A56394Billing and Coding: Colonoscopy and Sigmoidoscopy-Diagnostic
  • A56421Billing and Coding: CT of the Abdomen and Pelvis
  • A56456Billing and Coding: Colonoscopy/Sigmoidoscopy/Proctosigmoidoscopy
  • A56580Billing and Coding: Computerized Axial Tomography (CT), Thorax

How D12.6 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 D12.6.

  • Adenomatosisunspecified site
  • Dysplasiacolon
  • Dysplasiahigh grade, focal
  • Polyposiscoli
  • Polyposiscolon
  • Polyposisfamilial
  • Polyposisintestinal
  • Polyp, polypuscolonadenomatous

Related codes at this level

Codes that share D12. If D12.6 is not quite right, the correct code is usually one of these.

Questions about D12.6

Is D12.6 a billable ICD-10-CM code?
Yes. D12.6 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does D12.6 sit in the tabular list?
Neoplasms (C00-D49), in the block Benign neoplasms, except benign neuroendocrine tumors (D10-D36).
ICD-10-CMFY2026-Apr· effective April 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.