Summary & Overview
CPT 46285: Staged Fistula Repair, Second-Stage Procedure
CPT code 46285 designates the second-stage surgical repair of a severe fistula when the condition requires a staged approach rather than a single-session procedure. This code matters nationally because staged fistula management can affect hospital and ambulatory surgical center workflows, resource use, and billing complexity for complex colorectal and perianal surgical care. Key payers commonly involved in coverage decisions include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
Readers will find a concise national overview of the code's clinical intent, typical sites of service (ambulatory surgical center and hospital operating room), and the implications for procedural planning. The publication provides benchmarks and coding guidance context where available, summarizes payer coverage patterns, and highlights relevant clinical context for staged fistula repair. It also outlines common modifiers and documentation considerations for claims processing. Data not available in the input is clearly noted where applicable.
Billing Code Overview
CPT code 46285 describes the second-stage surgical management of a severe fistula when treatment cannot be completed in a single session. The procedure represents a staged operative approach focused on definitive repair during a subsequent operation after initial management of the fistula tract.
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Service type: Staged surgical fistula repair
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Typical site of service: Ambulatory surgical center or hospital operating room
CPT code 46285 is specific to the second stage of a planned, multi-stage fistula treatment and is used when complexity or patient condition prevents single-session completion.
Clinical & Coding Specifications
Clinical Context
A 48-year-old patient with a complex transsphincteric perianal fistula previously managed with a staged approach presents for the second-stage surgical repair. The first stage involved abscess drainage and seton placement to control sepsis and promote drainage. The patient now has reduced local inflammation and is scheduled for definitive fistula repair under anesthesia. The clinical workflow includes preoperative assessment (history, focused exam, and anesthesia clearance), intraoperative identification of the internal and external openings, performance of the definitive second-stage procedure (e.g., advancement flap, LIFT partial completion, or fistulotomy limited to remaining tract as clinically appropriate), hemostasis, and wound care instructions. Postoperative care includes pain control, stool softeners, wound checks, and follow-up to evaluate healing and continence.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Normal discharge from physician's care after evaluation and management | Use when reporting routine postoperative care included in global period if separate E/M is provided and qualifies per payer rules |
22 | Increased procedural services |