Summary & Overview
HCPCS S2066: Breast Reconstruction with Gluteal Artery Perforator (GAP) Flap, Unilateral
HCPCS Level II code S2066 represents unilateral breast reconstruction using a gluteal artery perforator (GAP) flap, encompassing flap harvest, microvascular transfer, donor-site closure, and shaping of the flap into a breast. This complex microsurgical procedure is a clinically important option for autologous breast reconstruction and carries implications for surgical resource use, facility planning, and reimbursement policy at a national level.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna, UnitedHealthcare, and Medicare. Readers will find a concise overview of coverage and benchmarking considerations, typical sites of service and clinical context for GAP flap reconstruction, and identification of common billing modifiers and administrative considerations when they are available. The publication outlines policy-relevant issues such as coding specificity for microsurgical autologous reconstruction, expected service settings, and the role of S2066 in surgical care pathways.
This summary equips clinicians, billing staff, and policy stakeholders with the core facts needed to interpret the purpose and clinical context of S2066, understand which major payers typically factor into national analyses, and locate additional detailed benchmarking and policy content elsewhere in the publication. Data not available in the input will be noted where applicable in subsequent sections.
Billing Code Overview
HCPCS Level II code S2066 describes breast reconstruction with gluteal artery perforator (GAP) flap, unilateral, including harvesting of the flap, microvascular transfer, closure of the donor site, and shaping the flap into a breast. This is a reconstructive surgical service that typically follows mastectomy or other breast tissue loss.
Service Type: Reconstructive microsurgical breast reconstruction (GAP flap), unilateral
Typical Site of Service: Hospital operating room or ambulatory surgical center (inpatient or outpatient surgical setting depending on clinical complexity and institutional practice)
Clinical & Coding Specifications
Clinical Context
A typical patient is a 45-year-old woman presenting for unilateral breast reconstruction after mastectomy for breast cancer. She previously underwent oncologic mastectomy with or without radiation and is medically optimized for microvascular surgery. Preoperative planning includes imaging (CT angiography or Doppler) to identify superior or inferior gluteal artery perforators and assessment of donor-site tissue and patient comorbidities. The operative workflow involves harvesting a gluteal artery perforator (GAP) flap from the buttock region, microsurgical anastomosis of the flap pedicle to recipient chest wall vessels, shaping the transferred tissue to reconstruct the breast mound, and closure of the donor site. Postoperative care includes flap monitoring in a post-anesthesia care unit or specialized microsurgery recovery unit, anticoagulation according to institutional protocol, pain control, wound care, and physical therapy for donor-site mobility. Typical inpatient stay ranges from 2–5 days for flap monitoring and early recovery, with scheduled outpatient follow-up for wound checks and oncologic surveillance.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
62 | Two surgeons | Use when two surgeons work together as primary surgeons for portions requiring separate technical skills (eg, mastectomy and microsurgical reconstruction). |