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

Injection of sinus tract; therapeutic (separate procedure)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Injection of sinus tract, as described by CPT® Code 20500, refers to a therapeutic procedure aimed at addressing sinus tracts that may arise in the musculoskeletal system. These sinus tracts often develop as a consequence of an infection stemming from a puncture wound, or they may occur due to osteomyelitis, which is an infection of the bone that can follow an injury such as an open fracture or a surgical intervention. During this procedure, a sterile catheter is carefully inserted into the sinus tract and advanced until it meets resistance, indicating the end of the tract. To facilitate the treatment, sterile saline may be injected to cleanse the area by flushing out any accumulated fluid and debris. Following this, an antibiotic or another therapeutic agent is administered through the catheter to effectively treat the underlying infection. This procedure is classified as a separate therapeutic intervention, distinct from the diagnostic procedure identified by CPT® Code 20501, which involves the use of radiographic supervision to assess the sinus tract's characteristics.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

Injection of sinus tract (CPT® Code 20500) is indicated for the treatment of conditions associated with sinus tracts in the musculoskeletal system. These indications include:

  • Puncture Wound Infection - Sinus tracts may develop as a result of an infection following a puncture wound.
  • Osteomyelitis - The procedure is indicated for treating sinus tracts that arise due to osteomyelitis, which can occur after an open fracture or surgical procedure.

2. Procedure

The procedure for the injection of a sinus tract involves several key steps, which are detailed as follows:

  • Step 1: Preparation - The area surrounding the sinus tract is prepared and sterilized to minimize the risk of infection. This may involve cleaning the skin with an antiseptic solution.
  • Step 2: Catheter Insertion - A sterile catheter is carefully inserted into the sinus tract. The clinician advances the catheter until resistance is encountered, which indicates that the end of the tract has been reached.
  • Step 3: Flushing the Tract - Once the catheter is in place, sterile saline is injected through the catheter. This step is crucial as it helps to flush out any fluid, debris, or infectious material that may be present within the sinus tract.
  • Step 4: Therapeutic Injection - After flushing, an antibiotic or other therapeutic substance is injected through the catheter. This medication is intended to treat the infection and promote healing within the sinus tract.

3. Post-Procedure

Post-procedure care following the injection of a sinus tract may include monitoring the patient for any immediate adverse reactions to the injected substances. Patients may be advised to keep the area clean and dry, and to observe for any signs of continued infection or complications. Follow-up appointments may be necessary to assess the effectiveness of the treatment and to determine if further interventions are required.

Short Descr INJECTION OF SINUS TRACT
Medium Descr INJECTION SINUS TRACT THERAPEUTIC SEPARATE PROC
Long Descr Injection of sinus tract; therapeutic (separate procedure)
Status Code Active Code
Global Days 010 - Minor Procedure
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
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 Office-based surgical procedure added to ASC list in CY 2008 or later with MPFS nonfacility PE RVUs; payment based on MPFS nonfacility PE RVUs.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P6B - Minor procedures - musculoskeletal
MUE 2
CCS Clinical Classification 156 - Injections and aspirations of muscles, tendons, bursa, joints and soft tissue
RT Right side (used to identify procedures performed on the right side of the body)
LT Left side (used to identify procedures performed on the left side of the body)
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.)
F1 Left hand, second digit
F2 Left hand, third digit
F3 Left hand, fourth digit
F4 Left hand, fifth digit
F5 Right hand, thumb
F6 Right hand, second digit
F7 Right hand, third digit
F8 Right hand, fourth digit
F9 Right hand, fifth digit
FA Left hand, thumb
GC This service has been performed in part by a resident under the direction of a teaching physician
SG Ambulatory surgical center (asc) facility service
TA Left foot, great toe
X5 Diagnostic services requested by another clinician: for reporting services by a clinician who furnishes care to the patient only as requested by another clinician or subsequent and related services requested by another clinician; this modifier is reported for patient relationships that may not be adequately captured by the above alternative categories; reporting clinician service examples include but are not limited to, the radiologist's interpretation of an imaging study requested by another clinician
XE Separate encounter, a service that is distinct because it occurred during a separate encounter
XP Separate practitioner, a service that is distinct because it was performed by a different practitioner
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
Action
Notes
Pre-1990 Added Code added.
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"