Summary & Overview
CPT 27430: Quadriceps Femoris Release to Improve Knee Flexion
CPT code 27430 denotes a surgical soft-tissue release of the quadriceps femoris muscle group performed to release adhesions and improve knee flexion. Nationally, this procedure is relevant for patients with post-traumatic or post-surgical contractures, prolonged stiffness, or scar-related functional limitation when nonoperative measures have failed. The code captures an operative intervention focused on restoring range of motion at the knee joint and may affect surgical utilization patterns, facility resource use, and post-operative rehabilitation needs.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the code’s clinical context, typical sites of service, and service classification. The publication also summarizes payer coverage considerations, common billing modifiers observed with this service, and areas where policies or documentation requirements commonly influence claims adjudication.
This summary provides clinicians, billing professionals, and policy analysts with the clinical framing of CPT code 27430, what to expect in terms of settings where the procedure is performed, and the primary topics covered in the full publication (benchmarks, policy interpretations, and clinical context). Data not available in the input will be identified explicitly in corresponding sections.
Billing Code Overview
CPT code 27430 describes a surgical procedure on the quadriceps femoris muscle to release adhesions and improve knee mobility. The procedure targets the quadriceps group — including the rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius — with the clinical goal of improving knee flexion by releasing restrictive scar tissue or contracture.
Service type: Surgical soft-tissue release of the quadriceps muscle group
Typical site of service: Hospital operating room or ambulatory surgery center, reflecting the invasive surgical nature of the procedure and need for surgical facilities and perioperative support.
Clinical & Coding Specifications
Clinical Context
A typical patient is a 45–70-year-old adult with restricted knee flexion and pain after trauma, prior knee surgery, or chronic quadriceps scarring. The patient reports progressive difficulty bending the knee, decreased gait function, and limitations with activities of daily living despite conservative care (physical therapy, NSAIDs, injections). Preoperative evaluation includes focused history, physical exam demonstrating quadriceps tightness and diminished knee flexion, imaging (knee radiographs and possible MRI) to exclude joint arthrosis or intra-articular causes, and documentation of failed nonoperative management. The surgical workflow involves preoperative consent and marking, general or regional anesthesia in an operating room or ambulatory surgery center, intraoperative release of quadriceps adhesions or contracture (open or limited exposure) to improve knee flexion, hemostasis, possible intraoperative irrigation, and closure. Postoperative care includes pain control, thromboprophylaxis as indicated, early range-of-motion exercises guided by physical therapy, and follow-up visits for wound check and functional assessment. Typical sites of service are the hospital operating room or ambulatory surgery center.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Surgeon performing the procedure | Use when the billed provider is the primary surgeon performing the release. |
22 | Increased procedural services | Use when the procedure requires substantially greater work than typical due to extensive adhesions, unexpected complexity, or prolonged operative time. |
52 | Reduced services | Use when the procedure is partially reduced or not completed as planned. |
53 | Discontinued procedure | Use when the procedure is started but halted due to unforeseen circumstances (patient instability, intraoperative findings). |
59 | Distinct procedural service | Use to indicate a separate and distinct procedure performed same day at a different site or session (ensure documentation supports distinctness). |
62 | Two surgeons | Use when two surgeons work together as primary surgeons performing distinct portions of the quadriceps release. |
76 | Repeat procedure by same physician | Data not available in the input. |
78 | Unplanned return to the operating room | Use when the patient returns to the OR for a related procedure during the global period (for complications). |
79 | Unrelated procedure or service during the postoperative period | Data not available in the input. |
LT | Left side | Use when the procedure is performed on the left lower extremity. |
RT | Right side | Use when the procedure is performed on the right lower extremity. |
50 | Bilateral procedure | Use when a bilateral quadriceps release is performed during the same operative session. |
22 | Increased procedural services | Data redundancy avoided; see above. |
51 | Multiple procedures | Use when additional unrelated CPT-coded procedures are performed at the same operative session in addition to the quadriceps release. |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| Data not available in the input. | Orthopaedic Surgery | Common specialty performing soft tissue knee procedures. |
| Data not available in the input. | Physical Medicine & Rehabilitation | Often involved in pre- and postoperative functional management. |
| Data not available in the input. | Sports Medicine (Orthopaedics) | Frequently treats knee contractures and performs operative releases. |
| Data not available in the input. | General Surgery | May rarely perform soft-tissue releases in specific contexts. |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
| Data not available in the input. | Data not available in the input. | Data not available in the input. |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
27447 | Repair, primary, torn or ruptured patellar tendon, with or without graft | Performed if concomitant patellar tendon pathology is identified and requires repair during the same session. |
27520 | Tenotomy, open, thigh, small or large | Related soft-tissue release procedures involving thigh muscles or tendons that may be done in conjunction with quadriceps release. |
20610 | Arthrocentesis, aspiration and/or injection; major joint or bursa (eg, shoulder, hip, knee) | May be performed preoperatively for diagnostic or therapeutic relief prior to deciding on surgical release. |
29881 | Arthroscopy, knee, surgical; with meniscal repair | May be performed before or after open quadriceps release if intra-articular pathology is present. |
27370 | Arthrotomy, knee, diagnostic or therapeutic | May be used when open joint exploration is required in the same operative setting. |