Summary & Overview
CPT 27437: Repair of Damaged Painful Patella
CPT code 27437 describes surgical repair of a painful, damaged kneecap (patella) performed without implantation of a prosthetic knee joint. This procedure is nationally relevant because it addresses common knee injuries and degenerative conditions that can cause pain, instability, and functional impairment, and it represents a distinct surgical pathway separate from knee arthroplasty. Payment policy and coverage criteria for this procedure influence access to reconstructive knee care, provider coding practices, and hospital and ambulatory surgery center utilization.
Key payers in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for CPT code 27437, common sites of service, and typical service characteristics. The publication outlines benchmark considerations for national payers, highlights policy and coding implications that affect claims processing, and summarizes clinical scenarios where patellar repair is selected over prosthetic joint replacement.
This brief equips payers, billing professionals, and clinical leaders with a clear description of the code’s purpose, how it differs from arthroplasty codes, and the types of settings in which the procedure is commonly delivered. Data not available in the input.
Billing Code Overview
CPT code 27437 describes a surgical procedure to repair a damaged, painful kneecap (patella) without inserting an artificial knee joint prosthesis. This procedure focuses on restoring anatomy and function of the patella and surrounding structures rather than performing a partial or total knee arthroplasty.
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Service type: Surgical repair of the patella (open or reconstructive knee surgery)
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Typical site of service: Hospital operating room or ambulatory surgery center
Clinical & Coding Specifications
Clinical Context
A typical patient is a 42-year-old active individual presenting with chronic anterior knee pain, recurrent patellar instability, or focal chondral damage isolated to the patella after a history of trauma or failed conservative care. The patient has persistent pain, mechanical symptoms, or functional limitation despite physical therapy, bracing, activity modification, and injections. Preoperative workup includes history and physical exam focused on patellofemoral alignment, weight-bearing and skyline radiographs, MRI to assess cartilage, soft tissues, and extensor mechanism, and routine preoperative medical clearance. The surgical workflow for 27437 begins with informed consent and anesthesia evaluation (general or regional). Intraoperatively, the orthopedic surgeon evaluates the patella and surrounding structures, performs procedures to repair or realign the patella without total knee arthroplasty (examples include chondroplasty, microfracture, osteochondral fragment fixation, medial patellofemoral ligament repair/reconstruction adjuncts when limited to the patella repair), and achieves hemostasis. The surgical encounter includes operative documentation of indications, findings, detailed steps of the repair, implants used, estimated blood loss, and postoperative instructions. Postoperative care includes pain control, wound checks, physical therapy protocols focused on range of motion and quadriceps strengthening, and routine follow-up visits to assess healing and function. Typical site of service is an ambulatory surgical center or hospital outpatient department; inpatient stay is uncommon unless there are medical comorbidities or complex reconstruction needs. Service type is orthopedic surgical repair of the patella without prosthetic joint replacement.
Coding Specifications
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