CPT 27301: Incision and Drainage of Deep Thigh or Knee Abscess

CPT code 27301 covers incision and drainage of deep abscesses, bursae, or hematomas in the thigh or knee region — a targeted surgical intervention to manage deep soft-tissue infection and relieve pain. This procedure is clinically important because timely source control can reduce morbidity, prevent systemic spread of infection, and often determines the need for inpatient care versus outpatient management. Nationally, consistent coding of procedures like 27301 affects surgical quality measurement, resource utilization, and payment across acute and ambulatory settings.

Key payers referenced in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of clinical context and typical settings for the service, benchmark considerations for utilization and site-of-service selection, common billing and documentation themes that influence payment, and relevant modifiers and billing complexities summarized for operational use. The content outlines where 27301 is typically performed (emergency departments, hospitals, and ambulatory surgical centers) and highlights policy and billing areas that tend to drive variability, such as anesthesia requirements, extent of debridement, and concurrent procedures.

Data not available in the input for associated taxonomies, ICD-10 diagnoses, and related codes is noted where applicable. This summary is intended for billing, clinical operations, and policy audiences seeking a national overview of CPT code 27301 and its role in managing deep thigh or knee infections.

Billing Code Overview

CPT code 27301 describes an incision and drainage procedure of an abscess, bursa, or hematoma located in deep structures of the thigh or knee region. The procedure is performed to treat infection and to relieve pain by evacuating purulent material, blood, or fluid collections within deep soft tissues.

Service type: Surgical—open incision and drainage of deep soft-tissue infection

Typical site of service: Hospital inpatient or outpatient operating room, emergency department, or ambulatory surgical center, depending on patient stability, infection severity, and required anesthesia.

Clinical Context

A 46-year-old male presents to the emergency department with a 48-hour history of escalating left thigh pain, swelling, erythema, and fever. Physical examination reveals a fluctuant, tender deep-seated mass in the anterior thigh with limited knee flexion. Point-of-care ultrasound suggests a localized fluid collection deep to the fascia. Laboratory tests show leukocytosis and elevated inflammatory markers. The orthopedic surgeon evaluates the patient, documents the indication for drainage of a deep abscess in the thigh, obtains informed consent, and schedules an incision and drainage procedure under procedural sedation in the operating room. The workflow includes preoperative antibiotics as indicated, positioning and surgical prep, a deep incision through skin and subcutaneous tissue into the deep fascial plane, evacuation of purulent material, thorough irrigation, hemostasis, placement of a drain if needed, specimen collection for culture, and postoperative wound care instructions with follow-up for culture results and wound checks. Typical sites of service are the hospital operating room or the emergency department procedure area. Service type: surgical, deep tissue incision and drainage of the thigh/knee region for infection control and pain relief.

Coding Specifications

Modifier	Description	When to Use
`11`	Normal procedural services	Use when the service is performed as scheduled without unusual circumstances.

Taxonomy Code	Specialty	Notes
207P00000X	Orthopaedic Surgery	Orthopedic surgeons commonly perform deep thigh/knee drainage when musculoskeletal infection is suspected.
207L00000X	General Surgery	General surgeons perform deep soft-tissue drainage, especially in acute settings.
208000000X	Emergency Medicine	Emergency physicians may perform incision and drainage emergently or facilitate operative transfer.
208800000X	Family Medicine	Family physicians with procedural skills may perform drainage in outpatient settings for appropriate cases.
213E00000X	Infectious Disease	Infectious disease specialists are often involved in antimicrobial management and interpretation of cultures.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`M00.86`	Staphylococcal arthritis, lower leg	Deep soft-tissue infections near the knee/thigh may be associated with septic arthritis requiring drainage.
`M65.861`	Abscess of tendon sheath, left knee	Localized purulent collections in periarticular structures can require deep incision and drainage.
`L02.419`	Cutaneous abscess of trunk, unspecified	Deep extension from superficial abscesses can progress into deep thigh structures necessitating `27301`.
`L03.116`	Cellulitis of left lower limb	Cellulitis with fluctuance or localized collection may progress to an abscess requiring drainage.
`S76.011A`	Strain of muscle, fascia and tendon of single thigh muscle, right thigh, initial encounter	Traumatic hematoma can become infected and require deep evacuation similar to this procedure.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`10060`	Incision and drainage of abscess; simple or single	Performed for superficial abscesses; may be billed when superficial drainage is done instead of deep drainage.
`10061`	Incision and drainage of abscess; complicated or multiple	Used for multiple or complicated superficial abscesses; may accompany deeper procedures if multiple sites are treated.
`20005`	Drainage of hematoma, seroma or fluid collection (eg, hematoma) deep in soft tissues; without drainage tube, complicated	May be used when draining deep hematoma of thigh/knee region rather than purulent abscess.
`10160`	Puncture aspiration of abscess, simple or single	Used when aspiration (needle) rather than incision is performed; may be an initial attempt before surgical I&D.
`11042`	Debridement, subcutaneous tissue (eg, open wounds, non-healing)	May be used when significant necrotic tissue debridement is required in conjunction with drainage.
`10180`	Incision and drainage, complex/infected pilonidal cyst; or extensive drainage	May be relevant when complex soft-tissue infections requiring wide drainage techniques are performed.

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Summary & Overview