K60.421
✓ BillableRectal fistula, complex, initial
Diseases of the digestive system (K00-K95)
Also Known As
❌ Excludes1
inheritedRules inherited from parent codes in the hierarchy.
- • congenital fistula (Q43.6)
- • rectovaginal fistula (N82.3)
- • vesicorectal fistual (N32.1)
⚠️ Excludes2
inheritedRules inherited from parent codes.
- • abscess or cellulitis of anal and rectal regions (K61.-)
- • anal sphincter tear (healed) (nontraumatic) (old) (K62.81)
📋 Code Instructions
inherited- • Code first: , if applicable:
- • Code first: Crohn's disease (K50.-)
- • Code first: ulcerative colitis (K51.-)
Clinical Description
ICD-10-CM code K60.421 represents rectal fistula, complex, initial. This code falls under the Diseases of the digestive system (K00-K95) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 7-character code at the 6th level of specificity. This is the most specific code available in this subcategory. Coders should note that K60.421 has 3 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code K60.421?
ICD-10-CM code K60.421 is "Rectal fistula, complex, initial". It belongs to the category: Diseases of the digestive system (K00-K95).
Is K60.421 a billable ICD-10 code?
Yes, K60.421 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
What codes are excluded with K60.421?
K60.421 has 3 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Can K60.421 be coded with other codes?
K60.421 has 2 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.
Related Codes in K60.42
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)