ICD-10 codes for Inflammatory Bowel Disease
Inflammatory Bowel Disease is coded primarily under K50, K50.90, K51 in the ICD-10-CM (Clinical Modification) classification. Top-level categories include K50 (Crohn's disease [regional enteritis]); K51 (Ulcerative colitis); K52 (Other and unsp noninfective gastroenteritis and colitis). The 2025 ICD-10-CM code set includes 119 codes related to inflammatory bowel disease, of which 91 are billable (specific enough to appear on a medical claim).
Inflammatory bowel disease (IBD) splits into Crohn disease (K50) and ulcerative colitis (K51). Each has subcodes specifying location and complications. K50.90 (Crohn disease, unspecified, without complications) and K51.90 (ulcerative colitis, unspecified, without complications) are the most commonly used.
Total Codes
119
Billable Codes
91
Categories
3
SNOMED CT Concepts
25+
Top 12 Relevant ICD-10 Codes
The codes most commonly assigned to inflammatory bowel disease, ranked by primary-match status, billable status, and specificity. Tap a code to see its full ICD-10 detail page.
K50.90Crohn's disease, unspecified, without complications
K51.90Ulcerative colitis, unspecified, without complications
K50Crohn's disease [regional enteritis]
K51Ulcerative colitis
K52.0Gastroenteritis and colitis due to radiation
K52.1Toxic gastroenteritis and colitis
K52.3Indeterminate colitis
K52.9Noninfective gastroenteritis and colitis, unspecified
K50.00Crohn's disease of small intestine without complications
K50.10Crohn's disease of large intestine without complications
K50.80Crohn's disease of both small and lg int w/o complications
K51.00Ulcerative (chronic) pancolitis without complications
Primary Code Categories
These are the top-level ICD-10-CM categories for inflammatory bowel disease. Click any code to see all specific subcodes within that group.
Billable / Specific Codes (91)
Specific ICD-10-CM codes that can be reported on medical claims for inflammatory bowel disease.
K50.00Crohn's disease of small intestine without complications
K50.011Crohn's disease of small intestine with rectal bleeding
K50.012Crohn's disease of small intestine w intestinal obstruction
K50.013Crohn's disease of small intestine with fistula
K50.014Crohn's disease of small intestine with abscess
K50.018Crohn's disease of small intestine with other complication
K50.019Crohn's disease of small intestine with unsp complications
K50.10Crohn's disease of large intestine without complications
K50.111Crohn's disease of large intestine with rectal bleeding
K50.112Crohn's disease of large intestine w intestinal obstruction
K50.113Crohn's disease of large intestine with fistula
K50.114Crohn's disease of large intestine with abscess
K50.118Crohn's disease of large intestine with other complication
K50.119Crohn's disease of large intestine with unsp complications
K50.80Crohn's disease of both small and lg int w/o complications
K50.811Crohn's disease of both small and lg int w rectal bleeding
K50.812Crohn's disease of both small and lg int w intestinal obst
K50.813Crohn's disease of both small and large intestine w fistula
K50.814Crohn's disease of both small and large intestine w abscess
K50.818Crohn's disease of both small and lg int w oth complication
K50.819Crohn's disease of both small and lg int w unsp comp
K50.90Crohn's disease, unspecified, without complications
K50.911Crohn's disease, unspecified, with rectal bleeding
K50.912Crohn's disease, unspecified, with intestinal obstruction
K50.913Crohn's disease, unspecified, with fistula
K50.914Crohn's disease, unspecified, with abscess
K50.918Crohn's disease, unspecified, with other complication
K50.919Crohn's disease, unspecified, with unspecified complications
K51.00Ulcerative (chronic) pancolitis without complications
K51.011Ulcerative (chronic) pancolitis with rectal bleeding
K51.012Ulcerative (chronic) pancolitis with intestinal obstruction
K51.013Ulcerative (chronic) pancolitis with fistula
K51.014Ulcerative (chronic) pancolitis with abscess
K51.018Ulcerative (chronic) pancolitis with other complication
K51.019Ulcerative (chronic) pancolitis with unsp complications
K51.20Ulcerative (chronic) proctitis without complications
K51.211Ulcerative (chronic) proctitis with rectal bleeding
K51.212Ulcerative (chronic) proctitis with intestinal obstruction
K51.213Ulcerative (chronic) proctitis with fistula
K51.214Ulcerative (chronic) proctitis with abscess
K51.218Ulcerative (chronic) proctitis with other complication
K51.219Ulcerative (chronic) proctitis with unsp complications
K51.30Ulcerative (chronic) rectosigmoiditis without complications
K51.311Ulcerative (chronic) rectosigmoiditis with rectal bleeding
K51.312Ulcerative (chronic) rectosigmoiditis w intestinal obst
K51.313Ulcerative (chronic) rectosigmoiditis with fistula
K51.314Ulcerative (chronic) rectosigmoiditis with abscess
K51.318Ulcerative (chronic) rectosigmoiditis with oth complication
K51.319Ulcerative (chronic) rectosigmoiditis w unsp complications
K51.40Inflammatory polyps of colon without complications
...and 41 more specific codes. Search all codes.
Cross-Mappings to Other Standards
ICD-10-CM codes for inflammatory bowel disease link to several adjacent terminologies. These mappings are precomputed from official sources (NLM RxNav, UMLS Metathesaurus, SNOMED CT International) and served via AutoICD's reference and translate APIs.
SNOMED CT
25+ concepts mapped from this code group. Concept IDs include 1197733006, 196977009, 235709008, 253855721000119107, ....
Browse SNOMED CT directoryUMLS Metathesaurus
25+ CUIs indexed. Sample: C0010346, C0156146, C0267380, C0678201, ....
Browse UMLS directoryICD-11
ICD-11 (WHO 2022) classifies many of these conditions under different chapter and stem-code structures. Use the converter to see specific ICD-10 to ICD-11 mappings.
Open ICD-10 to ICD-11 converterFrequently Asked Questions
What is the ICD-10 code for inflammatory bowel disease?
The primary ICD-10-CM codes for inflammatory bowel disease are K50, K50.90, K51. Across all sub-categories, 119 codes are grouped under inflammatory bowel disease, with 91 marked as billable (specific enough for a medical claim).
How many ICD-10 codes are there for inflammatory bowel disease?
There are 119 ICD-10-CM codes related to inflammatory bowel disease. Of these, 91 are billable specific codes and 28 are non-billable header categories that organize the specific codes underneath them. Header codes cannot be reported on a claim by themselves.
Is there a billable ICD-10 code for inflammatory bowel disease?
Yes. 91 of the 119 ICD-10-CM codes for inflammatory bowel disease are billable. Common examples include K50.00 (Crohn's disease of small intestine without complications); K50.011 (Crohn's disease of small intestine with rectal bleeding); K50.012 (Crohn's disease of small intestine w intestinal obstruction). Code to the highest level of specificity supported by the documentation.
Which inflammatory bowel disease ICD-10 code should I use for billing?
The most commonly used billable codes for inflammatory bowel disease include: K50.00 (Crohn's disease of small intestine without complications); K50.011 (Crohn's disease of small intestine with rectal bleeding); K50.012 (Crohn's disease of small intestine w intestinal obstruction). The correct code depends on the documented clinical presentation, including any complications, episode (acute / chronic), and laterality where applicable. Always code to the highest level of specificity supported by the clinical documentation.
Is K50 a billable ICD-10 code?
No, K50 (Crohn's disease [regional enteritis]) is a non-billable header code. You need to use a more specific child code for billing purposes.
What are the SNOMED CT concepts for inflammatory bowel disease?
The ICD-10 codes for inflammatory bowel disease map to at least 25 SNOMED CT concepts. Examples of SNOMED CT concept IDs in this group include 1197733006, 196977009, 235709008, 253855721000119107, 38106008. SNOMED CT is a clinical terminology used in electronic health records; AutoICD's coding API returns SNOMED CT IDs alongside each ICD-10 code via the include_snomed=true flag.
What UMLS Concept Unique Identifiers (CUIs) cover inflammatory bowel disease?
The ICD-10 codes for inflammatory bowel disease are linked to at least 25 UMLS CUIs in the National Library of Medicine's Metathesaurus. Sample CUIs include C0010346, C0156146, C0267380, C0678201, C2887749. UMLS CUIs unify the same concept across SNOMED CT, ICD-10, ICD-11, RxNorm, MeSH, and dozens of other source vocabularies.
What are other names for inflammatory bowel disease in ICD-10?
Inflammatory Bowel Disease may also be referred to as: inflammatory bowel disease, IBD, Crohn disease, ulcerative colitis, UC. The same ICD-10-CM codes apply regardless of which term appears in the clinical documentation. Synonyms are surfaced by AutoICD's NER pass and mapped to the canonical ICD-10 family above.
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