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Official Description

Excision, tumor, soft tissue of thigh or knee area, subfascial (eg, intramuscular); 5 cm or greater

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 27339 refers to the excision of a tumor located in the soft tissue of the thigh or knee area, specifically when the tumor is subfascial, meaning it is situated beneath the fascia, which is a layer of connective tissue. This procedure is applicable for tumors that measure 5 centimeters or greater. Soft tissues encompass a variety of structures, including subcutaneous fat, connective tissue, fascia, muscles, tendons, blood vessels, lymph vessels, nerves, and the tissues surrounding joints. Tumors found in these soft tissues can be either benign or malignant. Typically, benign tumors are treated through excision, while small malignant or indeterminate tumors may also be excised if they have well-defined margins. The surgical approach may involve incising the skin directly over the tumor or creating and elevating a skin flap, depending on the tumor's location. During the procedure, the overlying tissue is carefully dissected to expose the soft tissue mass, which is then excised along with a margin of healthy tissue to ensure complete removal. In some cases, a frozen section may be performed to verify that the margins are free of tumor cells, which is a critical step in ensuring the thoroughness of the excision. After the tumor is removed, drains may be placed as necessary, and the surgical wound is typically closed in layers to promote proper healing. For smaller tumors located in the subcutaneous fat or connective tissue, a different code, 27337, is used for excision of soft tissue tumors measuring 3 cm or greater, while CPT® Code 27339 is specifically designated for larger subfascial tumors.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The excision of subfascial soft tissue tumors in the thigh or knee area, as described by CPT® Code 27339, is indicated for the following conditions:

  • Benign Tumors - These tumors are typically non-cancerous and may require excision to alleviate symptoms or prevent complications.
  • Malignant Tumors - Small malignant or indeterminate tumors may be excised if they have well-defined margins, to ensure complete removal and minimize the risk of recurrence.
  • Symptomatic Tumors - Tumors that cause pain, discomfort, or functional impairment in the thigh or knee area may necessitate surgical intervention.

2. Procedure

The procedure for excising a subfascial soft tissue tumor in the thigh or knee area involves several critical steps:

  • Step 1: Anesthesia Administration - The patient is positioned appropriately, and local or general anesthesia is administered to ensure comfort during the procedure.
  • Step 2: Incision - An incision is made over the tumor site. Depending on the tumor's location, this may involve directly incising the skin or creating a skin flap that is elevated to provide better access to the underlying tissue.
  • Step 3: Dissection - The surgeon carefully dissects the overlying tissue to expose the soft tissue mass. This step is crucial to ensure that the tumor is adequately visualized and that surrounding structures are preserved as much as possible.
  • Step 4: Tumor Excision - The tumor is excised along with a margin of healthy tissue to ensure complete removal. This margin is essential to reduce the risk of residual tumor cells being left behind.
  • Step 5: Frozen Section Analysis - If indicated, a frozen section may be performed during the procedure to assess the margins for tumor cells, ensuring that the excision is complete.
  • Step 6: Drain Placement - Drains may be placed as needed to prevent fluid accumulation in the surgical site, which can aid in the healing process.
  • Step 7: Wound Closure - The surgical wound is closed in layers, which helps to promote proper healing and minimize scarring.

3. Post-Procedure

After the excision of a subfascial soft tissue tumor, patients may require specific post-procedure care. This includes monitoring for signs of infection, managing pain with prescribed medications, and following up with the healthcare provider to assess healing and discuss pathology results if a frozen section was performed. Patients are typically advised on activity restrictions to allow for proper recovery, and any drains placed during the procedure will be monitored and removed as necessary. Follow-up appointments are essential to ensure that the surgical site is healing appropriately and to address any complications that may arise.

Short Descr EXC THIGH/KNEE TUM DEP 5CM/>
Medium Descr EXC TUMOR SOFT TISSUE THIGH/KNEE SUBFASC 5 CM/>
Long Descr Excision, tumor, soft tissue of thigh or knee area, subfascial (eg, intramuscular); 5 cm or greater
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 Non office-based surgical procedure added in CY 2008 or later; payment based on OPPS relative payment weight.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P5B - Ambulatory procedures - musculoskeletal
MUE 4
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.
76 Repeat procedure or service by same physician or other qualified health care professional: it may be necessary to indicate that a procedure or service was repeated by the same physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 76 to the repeated procedure or service. note: this modifier should not be appended to an e/m service.
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).
AF Specialty physician
AG Primary physician
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
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
CR Catastrophe/disaster related
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)
PT Colorectal cancer screening test; converted to diagnostic test or other procedure
Q6 Service furnished under a fee-for-time compensation arrangement by a substitute physician or by a substitute physical therapist furnishing outpatient physical therapy services in a health professional shortage area, a medically underserved area, or a rural area
RT Right side (used to identify procedures performed on the right side of the body)
SG Ambulatory surgical center (asc) facility service
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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2011-01-01 Changed Short description changed.
2010-01-01 Added -
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