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Official Description

Release or recession, hamstring, proximal

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Proximal release or recession of the hamstring, as described by CPT® Code 27097, is a surgical procedure aimed at addressing flexion deformity of the knee, particularly in patients suffering from conditions such as cerebral palsy. This procedure is essential for improving the functional mobility of patients who experience limitations due to tightness or contracture of the hamstring muscles, which can lead to an inability to fully extend the knee. The surgery involves making an incision in the gluteal crease, which is strategically located over the ischial tuberosity, allowing access to the underlying structures. During the operation, the gluteus maximus muscle is carefully identified and retracted to expose the origins of the hamstring muscles. A critical aspect of the procedure is the identification and protection of the sciatic nerve, which runs in close proximity to the surgical site. The hamstring origins are then released from their attachment at the ischial tuberosity, enabling them to slide distally, which alleviates the tightness contributing to the knee flexion deformity. After the release, meticulous control of any bleeding is performed, and the incision is closed in layers to promote optimal healing. To ensure that the knee remains in an extended position during the recovery phase, a long leg cast is applied post-operatively.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The proximal release or recession of the hamstring is indicated for patients experiencing flexion deformity of the knee, particularly in the context of specific conditions. The following are the primary indications for this procedure:

  • Cerebral Palsy Patients with cerebral palsy often exhibit muscle tightness and contractures that can lead to knee flexion deformities, necessitating surgical intervention to improve mobility.

2. Procedure

The procedure for proximal release or recession of the hamstring involves several critical steps that ensure effective treatment of the knee flexion deformity. The following outlines the procedural steps:

  • Step 1: Incision An incision is made in the gluteal crease, specifically over the ischial tuberosity. This location is chosen to provide optimal access to the hamstring muscles while minimizing damage to surrounding tissues.
  • Step 2: Muscle Identification and Retraction The gluteus maximus muscle is identified and carefully retracted to expose the underlying structures. This step is crucial for gaining access to the hamstring origins without compromising the integrity of the surrounding muscles.
  • Step 3: Exposure of Hamstring Origins Once the gluteus maximus is retracted, the origins of the hamstring muscles are exposed. This allows the surgeon to assess the degree of tightness and plan for the release effectively.
  • Step 4: Sciatic Nerve Protection The sciatic nerve, which is located near the surgical site, is identified and protected throughout the procedure to prevent any potential nerve damage that could result in complications.
  • Step 5: Release of Hamstring Origins The hamstring origins are released from their attachment at the ischial tuberosity. This release allows the hamstring muscles to slide distally, alleviating the tightness that contributes to the knee flexion deformity.
  • Step 6: Hemostasis and Closure After the release, any bleeding is controlled meticulously. The incision is then closed in layers to promote proper healing and minimize scarring.
  • Step 7: Application of Long Leg Cast To maintain the knee in an extended position during the recovery phase, a long leg cast is applied post-operatively. This immobilization is essential for ensuring that the surgical correction is maintained as the patient heals.

3. Post-Procedure

Post-procedure care for patients who have undergone proximal release or recession of the hamstring includes monitoring for any signs of complications, such as infection or excessive bleeding. Patients are typically advised to keep the leg elevated and to follow specific instructions regarding weight-bearing activities. The long leg cast is usually maintained for a prescribed duration to ensure that the knee remains in an extended position, facilitating proper healing. Follow-up appointments are essential to assess the recovery process and to make any necessary adjustments to the rehabilitation plan.

Short Descr REVISION OF HIP TENDON
Medium Descr RELEASE/RECESSION HAMSTRING PROXIMAL
Long Descr Release or recession, hamstring, proximal
Status Code Active Code
Global Days 090 - Major Surgery
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 1 - 150% payment adjustment for bilateral procedures applies.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 2 - Payment restriction for assistants at surgery does not apply to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Hospital Part B services paid through a comprehensive APC
ASC Payment Indicator Surgical procedure on ASC list in CY 2007; payment based on OPPS relative payment weight.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P3D - Major procedure, orthopedic - other
MUE 1
CCS Clinical Classification 160 - Other therapeutic procedures on muscles and tendons
22 Increased procedural services: when the work required to provide a service is substantially greater than typically required, it may be identified by adding modifier 22 to the usual procedure code. documentation must support the substantial additional work and the reason for the additional work (ie, increased intensity, time, technical difficulty of procedure, severity of patient's condition, physical and mental effort required). note: this modifier should not be appended to an e/m service.
50 Bilateral procedure: unless otherwise identified in the listings, bilateral procedures that are performed at the same session, should be identified by adding modifier 50 to the appropriate 5 digit code. note: this modifier should not be appended to designated "add-on" codes (see appendix d).
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
59 Distinct procedural service: under certain circumstances, it may be necessary to indicate that a procedure or service was distinct or independent from other non-e/m services performed on the same day. modifier 59 is used to identify procedures/services, other than e/m services, that are not normally reported together, but are appropriate under the circumstances. documentation must support a different session, different procedure or surgery, different site or organ system, separate incision/excision, separate lesion, or separate injury (or area of injury in extensive injuries) not ordinarily encountered or performed on the same day by the same individual. however, when another already established modifier is appropriate it should be used rather than modifier 59. only if no more descriptive modifier is available, and the use of modifier 59 best explains the circumstances, should modifier 59 be used. note: modifier 59 should not be appended to an e/m service. to report a separate and distinct e/m service with a non-e/m service performed on the same date, see modifier 25.
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
LT Left side (used to identify procedures performed on the left side of the body)
RT Right side (used to identify procedures performed on the right side of the body)
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
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Pre-1990 Added Code added.
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