K51.21 is the authoritative medical code for Ulcerative chronic proctitis with complications. This classification is used in medical billing and clinical recording to specify the clinical criteria for ulcerative chronic proctitis with complications (ICD-10-CM K51.21), ensuring healthcare documentation aligns with current federal coding standards.
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Official Registry Overview & Definition
Ulcerative chronic proctitis with complications is a non-billable ICD-10-CM category code K51.21. A more specific billable subcode must be selected for claims submission. Includes: noninfective inflammatory bowel disease. 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 K51.21 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
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
Can K51.21 be billed directly?
No. K51.21 (Ulcerative chronic proctitis with complications) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
What can't be coded together with K51.21?
Per official ICD-10-CM Excludes1 instructions, K51.21 must not be reported together with: Crohn's disease [regional enteritis] (K50.-); irritable bowel syndrome (K58.-); megacolon (K59.3-).
Is an additional code needed with K51.21?
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-).
Nearest Codes in This Family
Official ICD-10-CM classifications closest to K51.21 in its code family, with their registry titles.
- 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