CPT 11770: Excision of Pilonidal Cyst or Sinus, Not Extensive

CPT code 11770 represents the surgical excision of a pilonidal cyst or sinus that does not require extensive dissection and is performed without complication. This code captures a commonly performed minor soft-tissue procedure used to treat symptomatic pilonidal disease and is important for accurate procedure reporting, billing, and national utilization monitoring. Correct use of this code affects claims processing, provider reimbursement, and quality measurement for outpatient surgical care.

Key payers in the national analysis include Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for coding 11770, typical settings where the service is provided (outpatient surgical suites, ambulatory surgery centers, and office procedure rooms), and the types of documentation elements that support use of this code. The publication also summarizes benchmarking topics and policy-relevant considerations such as coding specificity, common modifier application (listed separately), and payer coverage patterns where available.

The report offers concise benchmarks and practical policy updates relevant to billing and compliance for minor excisions of pilonidal disease, plus guidance on clinical context that informs code selection. Data not available in the input will be noted explicitly in the detailed sections.

Billing Code Overview

CPT code 11770 describes the excision of a pilonidal cyst or sinus that does not require extensive dissection and is performed without complication. The procedure involves surgical removal of the cyst or sinus tract and associated tissue sufficient to resolve the lesion while avoiding wide or deep dissection.

Service Type: Minor soft-tissue surgical excision

Typical Site of Service: Outpatient surgical suite, ambulatory surgery center, or physician office-based procedure room

Data not available in the input for associated taxonomies, ICD-10 diagnoses, and related codes.

Clinical Context

A 28-year-old male presents to the outpatient surgical clinic with intermittent posterior midline sacrococcygeal pain, erythema, and a small draining sinus consistent with a chronic pilonidal cyst. After failed conservative care including local hygiene, hair removal, and antibiotic therapy for superimposed cellulitis, the surgeon schedules a minor excision under local anesthesia with possible sedation. The procedure room is the typical site of service; in some practices it may occur in an ambulatory surgery center. The provider makes a small elliptical incision, excises the cyst and sinus tracts without extensive dissection or flap closure, achieves hemostasis, and closes primarily or leaves the wound open for simple packing per the surgeon’s routine. Postoperative instructions address wound care, activity restrictions, and follow-up for wound checks and suture removal. Billing uses 11770 for excision of a pilonidal cyst or sinus when the procedure does not require extensive dissection and there are no intraoperative complications.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased Procedural Services	Use when work or resources substantially exceed usual for `11770` (document rationale).

Taxonomy Code	Specialty	Notes
207P00000X	General Surgery	Most common specialty performing `11770` for operative management of pilonidal disease.
207L00000X	Colorectal Surgery	Often manages recurrent or complex pilonidal disease; may perform excisions.
208000000X	Family Medicine	In some settings performs minor surgical procedures including uncomplicated pilonidal excision.
261QM0800X	Dermatology	May perform excision for superficial pilonidal disease in clinic settings.
2086S0122X	Wound Care Specialist (Surgical)	Involved for wound management and follow-up of pilonidal excisions.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`L05.01`	Pilonidal cyst with abscess	Represents an acutely infected pilonidal cyst often requiring I&D or excision.
`L05.02`	Pilonidal cyst without abscess	Chronic non-infected pilonidal sinus appropriate for elective excision with `11770`.
`L05.91`	Pilonidal cyst, unspecified	General code used when specific details are not documented but the diagnosis supports `11770`.
`L03.119`	Cellulitis of trunk, unspecified	May coexist with pilonidal disease; influences timing and approach to excision.
`K68.2`	Pilonidal sinus (alternate coding in some systems)	Historical/alternate descriptor relevant to clinical documentation of sinus tracts.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`10060`	Incision and drainage of abscess; simple or single	Performed when acute pilonidal abscess requires I&D prior to or instead of definitive excision.
`11750`	Excision of nail and nail matrix, partial or complete, for permanent removal	Data not available in the input.
`12031`	Repair, intermediate, wounds of scalp, axillae, trunk and/or extremities; 2.5 cm to 7.5 cm	Used when primary closure of the excision requires intermediate layered closure techniques.
`13160`	Secondary closure of surgical wound or debridement for delayed closure	Used when wound requires delayed closure or complex scar revision after excision.
`15734`	Muscle, myocutaneous, or fasciocutaneous flap; trunk	Relevant when extensive dissection or flap reconstruction is required for large or recurrent pilonidal disease (not covered by `11770`).

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Summary & Overview