K51
Non-billableUlcerative colitis
K51 is the ICD-10-CM code for Ulcerative colitis. It is a non-billable category code — use a more specific child code such as K51.0 for billing.
- Status
- Header (non-billable)
- Chapter
- K00-K95
- Subcodes
- 7
- Edition
- FY2026
K00-K95 Diseases of the digestive system
What this means — in plain language
MedlinePlus · NIHUlcerative colitis (UC) is a disease that causes inflammation and sores, called ulcers, in the lining of the rectum and colon. It is one of a group of diseases called inflammatory bowel disease. UC can happen at any age, but it usually starts between the ages of 15 and 30. It tends to run in families. The most common symptoms are pain in the abdomen and blood or pus in diarrhea. Other symptoms may include: Anemia…
Read more about Ulcerative Colitis at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Excludes1 — not coded here
- •Crohn's disease [regional enteritis] (K50.-)
Use additional code
Medications indicated for this condition
FDA labeling- AdalimumabTumor Necrosis Factor Blocker [EPC]›
- UstekinumabInterleukin-12 Antagonist [EPC]›
- PrednisoneCorticosteroid [EPC]›
- MesalamineAminosalicylate [EPC]›
- TofacitinibJanus Kinase Inhibitor [EPC]›
- InfliximabTumor Necrosis Factor Blocker [EPC]›
- Marcaine, Lidocaine, Kenalog, Povidone Iodine›
- Ozanimod›
- VedolizumabIntegrin Receptor Antagonist [EPC]›
- Balsalazide›
- Methylprednisolone Acetate, Lidocaine Hydrochloride, Bupivacaine Hydrochloride, Povidine Iodine, Sodium Chloride, Isopropyl Alcohol›
- Depo-medrol, Lidocaine, Isopropyl Alcohol›
Drugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
Frequently asked questions
- What is ICD-10 code K51?
- K51 is the ICD-10-CM code for "Ulcerative colitis". It falls under K00-K95 Diseases of the digestive system.
- Is K51 a billable code?
- No — K51 is a non-billable header code. Use a more specific child code (such as K51.0) for billing.
- What is excluded from K51?
- Excludes1 (not coded here): Crohn's disease [regional enteritis] (K50.-).
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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