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Official Description

Decompression fasciotomy, forearm and/or wrist, flexor AND extensor compartment; without debridement of nonviable muscle and/or nerve

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Decompression fasciotomy is a surgical procedure aimed at alleviating the pressure within muscle compartments, specifically in the forearm and/or wrist, to treat a condition known as compartment syndrome. Compartment syndrome occurs when swelling within a muscle compartment leads to increased pressure, which can compress blood vessels and nerves, potentially resulting in irreversible damage to the muscles and nerves if not addressed promptly. The muscle compartments in the forearm are divided into two main areas: the flexor compartment, which is located on the volar (anterior) side, and the extensor compartment, located on the dorsal (posterior) side. This procedure involves the surgical release of both compartments to restore normal blood flow and nerve function. The fascia, a dense connective tissue that encases the muscle compartments, does not stretch, so when swelling occurs, it can lead to significant complications. The decompression is performed without the removal of any nonviable muscle or nerve tissue, distinguishing it from other procedures that may involve debridement. The surgical approach typically includes incisions that allow access to both compartments, ensuring that adequate decompression is achieved to prevent further complications and promote recovery.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

Decompression fasciotomy is indicated for the treatment of compartment syndrome, which can arise from various conditions that lead to increased pressure within the muscle compartments of the forearm and wrist. The following are specific indications for this procedure:

  • Acute Compartment Syndrome - This condition may result from trauma, such as fractures, crush injuries, or severe contusions, leading to swelling and increased pressure within the compartments.
  • Chronic Compartment Syndrome - Although less common, this condition can occur in athletes or individuals engaged in repetitive activities that cause muscle swelling and pain, necessitating surgical intervention.
  • Vascular Compromise - Situations where blood flow is compromised due to swelling can lead to ischemia, making fasciotomy necessary to restore circulation.

2. Procedure

The procedure for decompression fasciotomy involves several critical steps to ensure effective release of pressure within both the flexor and extensor compartments:

  • Step 1: Incision for Flexor Compartment - The surgeon begins by making a curvilinear skin incision that starts proximal to the antecubital fossa at the elbow crease and extends down to the middle of the palm. Alternatively, a lazy S type incision may be utilized, which curves from the ulnar side at the elbow to the radial side at the mid-forearm and returns to the ulnar side at the wrist. This incision is then extended into the mid-palm area.
  • Step 2: Fascia Incision - Following the skin incision, the surgeon carefully incises through the fascia along the same line as the skin incision. This step is crucial to access the underlying muscle compartments. Compartment pressure is then checked to confirm that the deep flexor muscles have been adequately decompressed.
  • Step 3: Incision for Extensor Compartment - The next step involves decompression of the extensor compartment. A dorsal incision is made over the extensor muscles, specifically between the extensor wad and the extensor digitorum communis muscles. This incision allows access to the fascia covering the dorsal compartments.
  • Step 4: Opening the Fascia - The fascia over each of the two dorsal compartments is opened, ensuring that the fascia over both the superficial and deep muscle bellies is incised. This step is essential for relieving pressure on the extensor muscles.
  • Step 5: Pressure Check - After the fascia is opened, compartment pressures are checked again to ensure that the extensor muscles have been adequately decompressed, confirming the success of the procedure.
  • Step 6: Wound Management - The skin and fascial incisions are left open and covered with a dressing. The patient will typically be returned to the operating room for wound closure once the swelling subsides, which usually occurs within 24 to 72 hours.

3. Post-Procedure

After the decompression fasciotomy, the patient will require careful monitoring and management. The incisions are left open to allow for swelling to decrease, and they are covered with a sterile dressing to protect the surgical site. The patient is typically observed for signs of improved circulation and nerve function. Once the swelling has subsided, usually within 24 to 72 hours, the patient will be scheduled for a follow-up procedure to close the wounds. Post-operative care may include pain management, physical therapy, and monitoring for any complications such as infection or delayed healing. It is essential to follow the surgeon's instructions regarding activity restrictions and rehabilitation to ensure optimal recovery.

Short Descr DECOMPRESS FOREARM 2 SPACES
Medium Descr DCMPRN FASCT F/ARM&/WRST FLXR&XTNSR W/O DB
Long Descr Decompression fasciotomy, forearm and/or wrist, flexor AND extensor compartment; without debridement of nonviable muscle and/or nerve
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) P5B - Ambulatory procedures - musculoskeletal
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).
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).
82 Assistant surgeon (when qualified resident surgeon not available): the unavailability of a qualified resident surgeon is a prerequisite for use of modifier 82 appended to the usual procedure code number(s).
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
GW Service not related to the hospice patient's terminal condition
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)
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
Action
Notes
2013-01-01 Changed Medium Descriptor changed.
2002-01-01 Added First appearance in code book in 2002.
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