K51.418 — Inflammatory polyps of colon with other complication
K51.418 is a billable, specific ICD-10-CM code for inflammatory polyps of colon with other complication. It is valid for submission on a claim.
Excludes1 inherited from the categories above K51.418
These are not written on K51.418, but they bind it: a note on a category applies to every code beneath it. Billing K51.418 with anything listed here is a denial.
Excludes2 inherited from the categories above K51.418
Also inherited, and the opposite of Excludes1: these conditions are not part of K51.418, but a patient can have both, so you may code both.
Other codes that can never be billed with K51.418
These codes carry an Excludes1 note pointing at K51.418. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading K51.418 alone.
Risk adjustment
K51.418 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 81 Ulcerative Colitis0.244 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
K51.418 is named in 23 Medicare coverage policies — 23 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52423Billing and Coding: Infliximab and biosimilars
- A52423Billing and Coding: Infliximab and biosimilars
- A55937Billing and Coding: Diagnostic Colonoscopy
- A56394Billing and Coding: Colonoscopy and Sigmoidoscopy-Diagnostic
How K51.418 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 K51.418.
- Polyp, polypus›colon›inflammatory›with›complication›specified NEC
Code history
K51.418 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share K51.41. If K51.418 is not quite right, the correct code is usually one of these.
Questions about K51.418
- Is K51.418 a billable ICD-10-CM code?
- Yes. K51.418 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does K51.418 sit in the tabular list?
- Diseases of the digestive system (K00-K95), in the block Noninfective enteritis and colitis (K50-K52).
- What cannot be coded together with K51.418?
- K51.418 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above K51.418 (K51) and apply to it just the same.