Coding Ahead
CasePilot
Medical Coding Assistant
Case2Code
Search and Code Lookup Tool
RedactPHI
HIPAA-Compliant PHI Redaction
DetectICD10CM
ICD-10-CM Code Detection
Log in Register free account
1 code page views remaining. Guest accounts are limited to 1 page view. Register free account to get 5 more views.
Log in Register free account

Official Description

Decompression fasciotomy, thigh and/or knee, 1 compartment (flexor or extensor or adductor); with 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 a muscle compartment, which is critical in treating compartment syndrome. Compartment syndrome occurs when swelling within a muscle compartment leads to increased pressure that can compress blood vessels and nerves, potentially resulting in irreversible damage to the muscles and nerves if not addressed promptly. The muscle compartments are encased in fascia, a dense connective tissue that does not stretch, thus any swelling can lead to significant complications. In the thigh and knee regions, there are three primary compartments: the flexor, extensor, and adductor compartments. The CPT® Code 27497 specifically refers to the decompression of one of these compartments, accompanied by the debridement of any nonviable muscle and/or nerve tissue. This procedure involves making an incision over the lateral aspect of the thigh, allowing for access to the affected compartment. The surgical approach includes careful dissection of the subcutaneous tissue and iliotibial band, followed by the reflection of the vastus lateralis muscle to access the compartment. The procedure is critical in preventing long-term damage and ensuring the restoration of normal function in the affected limb.

© 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 leading to increased pressure within a muscle compartment. The following are specific indications for performing this procedure:

  • Compartment Syndrome: A condition characterized by increased pressure within a muscle compartment, leading to compromised blood flow and potential nerve and muscle damage.
  • Swelling Due to Trauma: Injuries that result in significant swelling, such as fractures or crush injuries, can necessitate a fasciotomy to relieve pressure.
  • Ischemia: Signs of reduced blood flow to the muscles and nerves within the compartment, indicating the need for surgical intervention to prevent permanent damage.

2. Procedure

The procedure for decompression fasciotomy involves several critical steps to ensure effective treatment of compartment syndrome:

  • Step 1: A skin incision is made over the lateral aspect of the thigh, starting just distal to the intertrochanteric line and extending to the lateral epicondyle. This incision provides access to the underlying structures.
  • Step 2: The subcutaneous tissue is carefully dissected to expose the iliotibial band, which is a thick band of connective tissue that runs along the outer thigh.
  • Step 3: The iliotibial band is incised in the direction of its fibers to allow for further access to the muscle compartments beneath.
  • Step 4: The vastus lateralis muscle is reflected off the lateral intermuscular septum, and the septum is opened both proximally and distally along the entire length of the incision. This step is crucial for accessing the affected compartment.
  • Step 5: Pressures within the anterior or posterior compartment are assessed. If elevated, an incision is made in the affected compartment to relieve the pressure.
  • Step 6: If the adductor compartment is involved, a medial incision is made to decompress this compartment as well.
  • Step 7: After decompression, the pressure in the affected compartment is rechecked to confirm that adequate relief has been achieved.
  • Step 8: Any bleeding is controlled using electrocautery to minimize blood loss during the procedure.
  • Step 9: The muscle tissue and nerves are inspected for viability, and any nonviable tissue is debrided using sharp excision to promote healing.
  • Step 10: The skin and fascial incisions are left open and covered with a dressing, allowing for swelling to decrease before closure.
  • Step 11: The patient is typically returned to the operating room for wound closure once the swelling subsides, usually within 24 to 72 hours.

3. Post-Procedure

After the decompression fasciotomy, the patient will require careful monitoring and post-operative care. The incisions are left open to allow for any residual swelling to decrease, and they are covered with a sterile dressing to protect the area. The patient may need to be observed for signs of infection or complications related to the procedure. Once the swelling has subsided, typically within 24 to 72 hours, the patient will return to the operating room for closure of the incisions. Rehabilitation and physical therapy may be necessary to restore function and strength in the affected limb following the procedure.

Short Descr DECOMPRESSION OF THIGH/KNEE
Medium Descr DCMPRN FASCT THIGH&/KNEE DBRDMT MUSCLE&/NERVE
Long Descr Decompression fasciotomy, thigh and/or knee, 1 compartment (flexor or extensor or adductor); with 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) 0 - Payment restriction for assistants at surgery applies to this procedure...
Co-Surgeons (62) 2 - Co-surgeons permitted and no documentation required if the two- specialty requirement is met.
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
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.
62 Two surgeons: when 2 surgeons work together as primary surgeons performing distinct part(s) of a procedure, each surgeon should report his/her distinct operative work by adding modifier 62 to the procedure code and any associated add-on code(s) for that procedure as long as both surgeons continue to work together as primary surgeons. each surgeon should report the co-surgery once using the same procedure code. if additional procedure(s) (including add-on procedure(s) are performed during the same surgical session, separate code(s) may also be reported with modifier 62 added. note: if a co-surgeon acts as an assistant in the performance of additional procedure(s), other than those reported with the modifier 62, during the same surgical session, those services may be reported using separate procedure code(s) with modifier 80 or modifier 82 added, as appropriate.
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure 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
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)
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
Date
Action
Notes
2010-01-01 Changed Code description changed.
1993-01-01 Added First appearance in code book in 1993.
Code
Description
Code
Description
Code
Description
Code
Description
Code
Description
CasePilot

Get instant expert-level medical coding assistance.

Ask about:
CPT Codes Guidelines Modifiers Crosswalks NCCI Edits Compliance Medicare Coverage
Example: "What is CPT code 99213?" or "Guidelines for E/M services"