K51.20 is the authoritative medical code for Ulcerative chronic proctitis without complications. This classification is used in medical billing and clinical recording to specify the clinical criteria for ulcerative chronic proctitis without complications (ICD-10-CM K51.20), ensuring healthcare documentation aligns with 2026 federal coding standards.
Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.
Official Registry Overview & Definition
Ulcerative chronic proctitis without complications is a billable ICD-10-CM diagnosis code K51.20. Includes: noninfective inflammatory bowel disease. Inclusion terms: Ulcerative chronic proctitis NOS. Excludes1 (not coded here): Crohn's disease regional enteritis; irritable bowel syndrome K58.-; megacolon K59.3-. Use additional code: code to identify any associated fistulas, if applicable:; anal fistula K60.3-; anorectal fistula K60.5-; rectal fistula K60.4-; code to identify manifestations, such as:; pyoderma gangrenosum L88.
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for K51.20 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- noninfective inflammatory bowel disease
Inclusion Terms
Alternative terms the tabular list files under this code.
- Ulcerative chronic proctitis NOS
Excludes1 — Not Coded Here
Conditions that can never be reported with this code; the two are mutually exclusive.
- Crohn's disease regional enteritis
- irritable bowel syndrome K58.-
- megacolon K59.3-
Use Additional Code
Supplementary codes the tabular list directs you to add.
- code to identify any associated fistulas, if applicable:
- anal fistula K60.3-
- anorectal fistula K60.5-
- rectal fistula K60.4-
- code to identify manifestations, such as:
- pyoderma gangrenosum L88
Frequently Asked Questions (FAQ) & Clinical Guidance
What can't be coded together with K51.20?
Per Excludes1 instructions, K51.20 must not be reported with: Crohn's disease [regional enteritis] (K50.-); irritable bowel syndrome (K58.-); megacolon (K59.3-).
Is an additional code needed with K51.20?
Use additional code(s) to specify: code to identify any associated fistulas, if applicable:; anal fistula (K60.3-); anorectal fistula (K60.5-); rectal fistula (K60.4-).
What conditions are included under K51.20?
Ulcerative chronic proctitis without complications includes: Ulcerative (chronic) proctitis NOS.
Codes in This Family (40)
Official ICD-10-CM classifications in the same code family as K51.20, with their registry titles.
- K51 — Ulcerative colitis
- K51.0 — Ulcerative (chronic) pancolitis
- K51.01 — Ulcerative (chronic) pancolitis with complications
- K51.011 — Ulcerative (chronic) pancolitis with rectal bleeding
- K51.012 — Ulcerative (chronic) pancolitis with intestinal obstruction
- K51.013 — Ulcerative (chronic) pancolitis with fistula
- K51.014 — Ulcerative (chronic) pancolitis with abscess
- K51.018 — Ulcerative (chronic) pancolitis with other complication
- K51.019 — Ulcerative (chronic) pancolitis with unspecified complications
- K51.2 — Ulcerative (chronic) proctitis
- K51.21 — Ulcerative (chronic) proctitis with complications
- K51.211 — Ulcerative (chronic) proctitis with rectal bleeding
- K51.212 — Ulcerative (chronic) proctitis with intestinal obstruction
- K51.213 — Ulcerative (chronic) proctitis with fistula
- K51.214 — Ulcerative (chronic) proctitis with abscess
- K51.218 — Ulcerative (chronic) proctitis with other complication
- K51.219 — Ulcerative (chronic) proctitis with unspecified complications
- K51.3 — Ulcerative (chronic) rectosigmoiditis
- K51.30 — Ulcerative (chronic) rectosigmoiditis without complications
- K51.31 — Ulcerative (chronic) rectosigmoiditis with complications
- K51.311 — Ulcerative (chronic) rectosigmoiditis with rectal bleeding
- K51.312 — Ulcerative (chronic) rectosigmoiditis with intestinal obstruction
- K51.313 — Ulcerative (chronic) rectosigmoiditis with fistula
- K51.314 — Ulcerative (chronic) rectosigmoiditis with abscess
- K51.318 — Ulcerative (chronic) rectosigmoiditis with other complication
- K51.319 — Ulcerative (chronic) rectosigmoiditis with unspecified complications
- K51.4 — Inflammatory polyps of colon
- K51.40 — Inflammatory polyps of colon without complications
- K51.41 — Inflammatory polyps of colon with complications
- K51.411 — Inflammatory polyps of colon with rectal bleeding
- K51.412 — Inflammatory polyps of colon with intestinal obstruction
- K51.413 — Inflammatory polyps of colon with fistula
- K51.414 — Inflammatory polyps of colon with abscess
- K51.418 — Inflammatory polyps of colon with other complication
- K51.419 — Inflammatory polyps of colon with unspecified complications
- K51.5 — Left sided colitis
- K51.50 — Left sided colitis without complications
- K51.51 — Left sided colitis with complications
- K51.511 — Left sided colitis with rectal bleeding
- K51.512 — Left sided colitis with intestinal obstruction
Indexed Clinical Terms (1)
Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code.
- Proctitis, ulcerative (chronic)
Related Codes & Numerical Sequence (Crawl Map)
Search engines and indexers are advised to traverse adjacent medical codes in this sub-chapter range to find correlated diagnoses or therapeutic procedures: