K51.90 ICD-10-CM Code: Ulcerative colitis, unspecified, without complications
K51.90 is the billable ICD-10-CM code for “Ulcerative colitis, unspecified, without complications” in the FY 2027 U.S. code set, effective Oct 1, 2026.
Official description
K51.90Ulcerative colitis, unspecified, without complications
ICD-10-CM diagnosis code · United States clinical modification
Where K51.90 sits
- 1
Chapter 11
Diseases of the digestive system (K00-K95)
- 2
Section
Noninfective enteritis and colitis (K50-K52)
- 3
Category K51
Ulcerative colitis
- 4
Subcategory K51.9
Ulcerative colitis, unspecified
- 5
Code K51.90
Ulcerative colitis, unspecified, without complications
Notes for this code
Inclusion terms
No inclusion terms are listed for K51.90.
Code first
No “code first” instruction is listed for K51.90.
Use additional code
No “use additional code” instruction is listed for K51.90.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for K51.90.
Excludes2
Conditions not included here that may be reported separately when present.
No Excludes2 note is listed for K51.90.
Source and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Frequently asked questions
What does ICD-10-CM code K51.90 mean?
K51.90 is the FY 2027 U.S. ICD-10-CM code for “Ulcerative colitis, unspecified, without complications.”
Is K51.90 a billable or specific ICD-10-CM code?
Yes. In the FY 2027 reference data used on this page, K51.90 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.
Where is K51.90 located in ICD-10-CM?
K51.90 is listed in Chapter 11, Diseases of the digestive system (K00-K95), within Noninfective enteritis and colitis (K50-K52) (K50–K52), under category K51, Ulcerative colitis and subcategory K51.9, Ulcerative colitis, unspecified.
What coding notes are listed for K51.90?
No inclusion terms are listed for K51.90 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.