K51.91
K51.91 — Ulcerative colitis, unspecified, with complications
Non-billable headerICD-10-CM
K51.91 is a non-billable header ICD-10-CM code for ulcerative colitis, unspecified, with complications. It cannot be billed on its own: choose one of the more specific child codes below.
Other codes that can never be billed with K51.91
These codes carry an Excludes1 note pointing at K51.91. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading K51.91 alone.
Risk adjustment
K51.91 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.
Code to one of these instead K51.91
6 child codes. Green means billable.
- K51.911Ulcerative colitis, unspecified with rectal bleeding
- K51.912Ulcerative colitis, unspecified with intestinal obstruction
- K51.913Ulcerative colitis, unspecified with fistula
- K51.914Ulcerative colitis, unspecified with abscess
- K51.918Ulcerative colitis, unspecified with other complication
- K51.919Ulcerative colitis, unspecified with unspecified complications
Related codes at this level
Codes that share K51.9. If K51.91 is not quite right, the correct code is usually one of these.
Questions about K51.91
- Is K51.91 a billable ICD-10-CM code?
- No. K51.91 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does K51.91 sit in the tabular list?
- Diseases of the digestive system (K00-K95), in the block Noninfective enteritis and colitis (K50-K52).