CPT 46020 Anal Seton Placement Reimbursement | OpenPayer

Summary & Overview

CPT 46020: Anal Seton Placement, Minor Anorectal Surgery

CPT code 46020 represents the placement of an anal seton, a focused anorectal surgical procedure commonly used to manage anal fistulae by maintaining drainage and promoting healing. Nationally, this procedure is clinically important because it addresses a painful, recurrent condition that often requires surgical intervention and coordination between outpatient surgical facilities and colorectal or general surgeons. The code signals a minor operative service typically performed in outpatient surgical suites, ambulatory surgery centers, or hospital operating rooms.

Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context, common sites of service, and the role of the code in procedural billing workflows. The publication outlines benchmarking elements and policy-relevant factors such as site-of-service considerations and payer coverage variability. Where data are not provided in the input, the report indicates: Data not available in the input.

This article is intended for coding professionals, revenue cycle staff, and clinicians who need a clear national-level reference for coding and billing practices related to anal seton placement under CPT code 46020.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicare46020CPTanal setonanorectal surgeryoutpatient surgeryambulatory surgerysurgical coding

Billing Code Overview

CPT code 46020 describes the placement of an anal seton, a minor surgical procedure used to manage anal fistulae or related perianal tract disease. The procedure involves inserting a seton (a loop or thread) through the fistulous tract to permit drainage, reduce infection, and promote healing or allow staged definitive repair.

Service type: Minor surgical procedure, anorectal surgery
Typical site of service: Outpatient surgical suite, ambulatory surgery center, or hospital operating room

Clinical & Coding Specifications

Clinical Context

A typical patient is an adult presenting to a colorectal clinic or ambulatory surgical center with a chronically draining perianal fistula or recurrent anorectal sepsis. After evaluation with history, physical exam, and often anoscopy or flexible sigmoidoscopy, a colorectal surgeon or general surgeon determines that placement of an anal seton is indicated to maintain drainage, prevent abscess recurrence, and allow fistula tract maturation prior to definitive repair. The procedure is usually performed under local anesthesia with sedation or under general anesthesia in the operating room depending on complexity and patient tolerance. The workflow includes preoperative localization of the fistula tract, probing of the tract, passage of a rubber or vessel-loop seton through the internal and external openings, securing the seton with a tie or knot, documentation of tract orientation and seton type, and postprocedure instructions for wound care and follow-up. Typical sites of service are outpatient surgery centers, hospital outpatient departments, or inpatient operating rooms for complex cases. Common clinical indications include transsphincteric or complex perianal fistula, Crohn disease–related fistulas, and recurrent perianal abscess with persistent fistulous tract.

Coding Specifications

Modifier	Description	When to Use
`11`	Principal physician of record or primary service	When this physician performed the seton placement as the primary surgeon on the claim.

Related Codes

CPT-46070-ANAL-MEMBRANE-INCISION-INFANT

CPT 46070: Incision of Congenital Anal Membrane in Infant

CPT-46080-ANAL-SPHINCTEROTOMY-RELEASE-OF-ANAL-CONTRACTURE

CPT 46080: Anal Sphincterotomy to Release Anal Contracture

CPT-46050-PERIANAL-SUPERFICIAL-ABSCESS-INCISION-DRAINAGE

CPT 46050: Incision and Drainage of Superficial Perianal Abscess

CPT-46030-ANAL-SETON-REMOVAL-ANAL-FISTULA

CPT 46030: Removal of Anal Seton or Marker for Anal Fistula

CPT-46083-EXTERNAL-HEMORRHOID-THROMBECTOMY-INCISION-DRAINAGE

CPT 46083: Incision and Thrombectomy of External Hemorrhoid

CPT-46060-PERIRECTAL-ABSCESS-INCISION-DRAINAGE-FISTULA-MANAGEMENT

CPT 46060: Incision and Drainage of Perirectal Abscess with Fistula Management

CPT-46040-INCISION-DRAINAGE-ANORECTAL-ISCHIORECTAL-ABSCESS

CPT 46040: Incision and Drainage of Anorectal/Ischiorectal Abscess

CPT-46045-RECTAL-PERIRECTAL-ABSCESS-DRAINAGE-TRANSANAL

CPT 46045: Transanal Incision and Drainage of Rectal/Perirectal Abscess

Taxonomy Code	Specialty	Notes
`207P00000X`	Colorectal Surgery	Primary specialty most commonly performing seton placement.
`207R00000X`	General Surgery	Common provider type performing perianal procedures in community settings.
`207Q00000X`	Colon and Rectal Surgery	Use where specific colorectal subspecialty taxonomy is required.
`2080P0207X`	Gastroenterology	May perform initial evaluation and assist with endoscopic localization; rarely performs operative seton placement.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`K60.3`	Fistula-in-ano, unspecified	Primary indication for seton placement to manage persistent fistulous tract.
`K60.0`	Anal fissure and fistula (fistula-in-ano)	Used when documenting anorectal fistula as the reason for procedure.
`K60.4`	Fissure and fistula of anal canal (perianal fistula)	Reflects perianal fistulous disease requiring drainage and seton.
`K50.1`	Crohn disease of small intestine with disease of large intestine (perianal involvement)	Crohn disease commonly causes complex perianal fistulas managed with setons.
`K61.0`	Anal abscess	Acute abscess drainage and subsequent seton may be required for fistula control.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`45378`	Diagnostic anoscopy, rigid or flexible, with or without collection of specimen	Often performed preoperatively to localize the fistula/internal opening before seton placement.
`49020`	Drainage of perirectal abscess, transrectal; simple	Performed when an abscess is present prior to or at the time of seton placement to control infection.
`46010`	Fistulectomy, anorectal, simple; without repair	May be performed during the same operative episode when definitive excision of a simple fistula is indicated instead of or after seton placement.
`46255`	Fistulotomy, including marsupialization when performed, any location	Used when definitive opening of the fistula tract is performed as an alternative to seton placement for low/simple fistulas.
`49650`	Ligation, fistula-in-ano, seton, or other repair of complex fistula	Related complex fistula repairs that may follow chronic seton drainage prior to definitive closure.