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Official Description

Decompression fasciotomy, leg; posterior compartment(s) only

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

A decompression fasciotomy of the lower leg is a surgical procedure aimed at alleviating the pressure within the muscle compartments of the leg, specifically targeting the posterior compartment(s). The lower leg is anatomically divided into three primary muscle compartments: anterior, lateral, and posterior. Each of these compartments is encased in a tough, fibrous tissue known as fascia, which does not stretch. When conditions such as long bone fractures, crush injuries, or other forms of trauma occur, swelling can develop within these compartments. This swelling leads to increased interstitial pressure, which can compromise blood flow and result in tissue necrosis, ultimately causing permanent functional impairment of the limb if not addressed promptly. The procedure involves making a surgical incision to relieve the pressure and restore normal blood flow to the affected muscles and nerves. In the case of CPT® Code 27601, the focus is specifically on the posterior compartment(s) of the leg. The posterior compartment consists of two sections: the deep and superficial posterior compartments. The surgical approach typically involves a single longitudinal incision along the back of the leg, allowing access to both compartments. By incising the fascia, the surgeon can effectively decompress the area, thereby preventing further tissue damage and promoting recovery. This procedure is critical in managing compartment syndrome and preserving limb function.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The decompression fasciotomy of the posterior compartment(s) is indicated in the following situations:

  • Compartment Syndrome - A condition characterized by increased pressure within a muscle compartment, leading to reduced blood flow and potential tissue damage.
  • Long Bone Fractures - Fractures of the long bones can cause swelling and bleeding within the muscle compartments, necessitating surgical intervention to relieve pressure.
  • Crush Injuries - Severe trauma that compresses muscle tissue can lead to compartment syndrome, requiring fasciotomy to prevent necrosis.
  • Other Trauma - Any significant injury that results in swelling within the muscle compartments may warrant a decompression fasciotomy to protect the affected tissues.

2. Procedure

The procedure for decompression fasciotomy of the posterior compartment(s) involves several critical steps:

  • Incision - A longitudinal incision is made along the posterior aspect of the leg. This incision provides access to both the deep and superficial posterior compartments.
  • Undermining Tissues - The surgeon carefully undermines the tissues anterior to the posterior tibial margin. This step is crucial to avoid damaging the saphenous vein and nerve, which are located in this area.
  • Incising the Fascia - The fascia of the deep posterior compartment is incised longitudinally under the belly of the soleus muscle. This incision allows for the release of pressure within the deep compartment.
  • Opening the Superficial Compartment - To decompress the superficial posterior compartment, the fascia is incised posterior and parallel to the incision made for the deep compartment. This ensures that both compartments are adequately decompressed.

3. Post-Procedure

After the decompression fasciotomy, post-procedure care is essential for optimal recovery. Patients are typically monitored for signs of improved circulation and reduction in pain. Wound care is crucial to prevent infection at the incision sites. Rehabilitation may be necessary to restore function and strength in the affected leg. The expected recovery time can vary based on the extent of the injury and the individual patient's healing process. Follow-up appointments are important to assess the healing of the tissues and to determine if further interventions are needed.

Short Descr DECOMPRESSION OF LOWER LEG
Medium Descr DCMPRN FASCT LEG POST COMPARTMENT ONLY
Long Descr Decompression fasciotomy, leg; posterior compartment(s) only
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) 1 - Statutory payment restriction for assistants at surgery applies 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
LT Left side (used to identify procedures performed on the left side of the body)
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).
52 Reduced services: under certain circumstances a service or procedure is partially reduced or eliminated at the discretion of the physician or other qualified health care professional. under these circumstances the service provided can be identified by its usual procedure number and the addition of modifier 52, signifying that the service is reduced. this provides a means of reporting reduced services without disturbing the identification of the basic service. note: for hospital outpatient reporting of a previously scheduled procedure/service that is partially reduced or cancelled as a result of extenuating circumstances or those that threaten the well-being of the patient prior to or after administration of anesthesia, see modifiers 73 and 74 (see modifiers approved for asc hospital outpatient use).
58 Staged or related procedure or service by the same physician or other qualified health care professional during the postoperative period: it may be necessary to indicate that the performance of a procedure or service during the postoperative period was: (a) planned or anticipated (staged); (b) more extensive than the original procedure; or (c) for therapy following a surgical procedure. this circumstance may be reported by adding modifier 58 to the staged or related procedure. note: for treatment of a problem that requires a return to the operating/procedure room (eg, unanticipated clinical condition), see modifier 78.
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.
78 Unplanned return to the operating/procedure room by the same physician or other qualified health care professional following initial procedure for a related procedure during the postoperative period: it may be necessary to indicate that another procedure was performed during the postoperative period of the initial procedure (unplanned procedure following initial procedure). when this procedure is related to the first, and requires the use of an operating/procedure room, it may be reported by adding modifier 78 to the related procedure. (for repeat procedures, see modifier 76.)
79 Unrelated procedure or service by the same physician or other qualified health care professional during the postoperative period: the individual may need to indicate that the performance of a procedure or service during the postoperative period was unrelated to the original procedure. this circumstance may be reported by using modifier 79. (for repeat procedures on the same day, see modifier 76.)
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
AS Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
GC This service has been performed in part by a resident under the direction of a teaching physician
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
XU Unusual non-overlapping service, the use of a service that is distinct because it does not overlap usual components of the main service
Date
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Notes
2013-01-01 Changed Medium Descriptor changed.
Pre-1990 Added Code added.
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