K51.3Header code — not billable
Ulcerative (chronic) rectosigmoiditis
- Chapter
- 11. Diseases of the digestive system
- Category
- K51
- Effective date
- October 1, 2026
Related codes in category K51
K51Ulcerative colitisK51.0Ulcerative (chronic) pancolitisK51.00Ulcerative (chronic) pancolitis without complicationsYesK51.01Ulcerative (chronic) pancolitis with complicationsK51.011Ulcerative (chronic) pancolitis with rectal bleedingYesK51.012Ulcerative (chronic) pancolitis with intestinal obstructionYesK51.013Ulcerative (chronic) pancolitis with fistulaYesK51.014Ulcerative (chronic) pancolitis with abscessYesK51.018Ulcerative (chronic) pancolitis with other complicationYesK51.019Ulcerative (chronic) pancolitis with unsp complicationsYesK51.2Ulcerative (chronic) proctitisK51.20Ulcerative (chronic) proctitis without complicationsYes
Frequently asked questions
What is ICD-10 code K51.3?
K51.3 is an ICD-10-CM diagnosis code for Ulcerative (chronic) rectosigmoiditis.
Is K51.3 a billable code?
No. K51.3 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is K51.3 in?
K51.3 falls under Chapter 11: Diseases of the digestive system.
When did K51.3 become effective?
K51.3 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to K51.3?
K51.3 belongs to category K51, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.