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Official Description

Endovenous ablation therapy of incompetent vein, extremity, inclusive of all imaging guidance and monitoring, percutaneous, radiofrequency; subsequent vein(s) treated in a single extremity, each through separate access sites (List separately in addition to code for primary procedure)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

Endovenous ablation therapy of incompetent veins is a minimally invasive procedure performed on the extremities to treat varicose veins and other venous insufficiencies. This specific technique utilizes radiofrequency energy to close off incompetent veins, which are veins that are unable to effectively return blood to the heart due to valve dysfunction. The procedure is conducted percutaneously, meaning it is performed through the skin, and involves the use of imaging guidance to accurately locate and treat the targeted vein. The process begins with the preparation of the treatment site, followed by the administration of local anesthesia to ensure patient comfort. A small incision is made to access the vein, and a series of specialized instruments, including a guidewire and a radiofrequency ablation catheter, are used to deliver the treatment. The procedure is designed to be efficient and effective, allowing for the treatment of multiple veins in a single session, provided they are accessed through separate entry points. This code, CPT® 36476, specifically refers to the treatment of subsequent veins in the same extremity after the primary vein has been addressed, ensuring that each treated vein is documented and billed appropriately.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The endovenous ablation therapy of incompetent veins is indicated for patients presenting with symptoms related to venous insufficiency. These symptoms may include:

  • Varicose Veins - Enlarged, twisted veins that are often visible under the skin, causing discomfort and cosmetic concerns.
  • Chronic Venous Insufficiency - A condition where the veins cannot pump enough blood back to the heart, leading to swelling, pain, and skin changes.
  • Leg Pain or Discomfort - Patients may experience aching, heaviness, or fatigue in the legs, particularly after prolonged standing or sitting.
  • Swelling - Edema in the legs or ankles that may worsen throughout the day.
  • Skin Changes - Alterations in skin color or texture, including the development of ulcers or dermatitis due to poor circulation.

2. Procedure

The procedure for endovenous ablation therapy involves several critical steps to ensure effective treatment of the incompetent vein. Each step is designed to facilitate the safe and accurate delivery of radiofrequency energy to the targeted vein.

  • Step 1: Preparation - The physician begins by preparing the treatment site, ensuring that all necessary equipment is ready and functioning. This includes setting up the radiofrequency ablation catheter and testing the equipment to confirm its operational status.
  • Step 2: Imaging Guidance - Imaging guidance is employed to locate the targeted vein accurately. This may involve ultrasound or other imaging techniques to map and mark the entire length of the vein that will be treated.
  • Step 3: Anesthesia Administration - Local anesthetic is administered at the access site to minimize discomfort during the procedure. This step is crucial for patient comfort and cooperation.
  • Step 4: Venotomy - A small incision is made in the skin, and a venotomy is performed to access the vein. This allows for the introduction of instruments needed for the procedure.
  • Step 5: Guidewire Introduction - A guidewire is introduced into the vein through the venotomy. This guidewire serves as a pathway for subsequent instruments.
  • Step 6: Dilator and Sheath Placement - A dilator is advanced over the guidewire to facilitate the insertion of a sheath. The sheath is then secured in place with a suture, providing a stable access point for the radiofrequency probe.
  • Step 7: Radiofrequency Probe Insertion - The guidewire is removed, and the radiofrequency probe is introduced through the sheath. The probe is advanced along the vein under continuous imaging guidance.
  • Step 8: Anesthetic Infiltration - An anesthetic solution is infiltrated into the perivenous space along the entire length of the vein to further ensure patient comfort during the application of radiofrequency energy.
  • Step 9: Application of Radiofrequency Energy - The physician monitors impedance, power, and vein wall temperature throughout the procedure. Radiofrequency energy is applied as the probe is withdrawn, effectively closing off the incompetent vein.

3. Post-Procedure

After the endovenous ablation therapy is completed, patients are typically monitored for a short period to ensure there are no immediate complications. Post-procedure care may include instructions for activity modification, such as avoiding strenuous exercise for a specified duration. Patients may also be advised to wear compression stockings to support the healing process and improve circulation in the treated area. Follow-up appointments are often scheduled to assess the treatment's effectiveness and monitor for any potential complications or recurrence of symptoms. It is essential for patients to adhere to the post-procedure guidelines provided by their healthcare provider to ensure optimal recovery and outcomes.

Short Descr ENDOVENOUS RF VEIN ADD-ON
Medium Descr ENDOVEN ABLTJ INCMPTNT VEIN XTR RF 2ND+ VEINS
Long Descr Endovenous ablation therapy of incompetent vein, extremity, inclusive of all imaging guidance and monitoring, percutaneous, radiofrequency; subsequent vein(s) treated in a single extremity, each through separate access sites (List separately in addition to code for primary procedure)
Status Code Active Code
Global Days ZZZ - Code Related to Another Service
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 0 - No 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 Items and Services Packaged into APC Rates
ASC Payment Indicator Packaged service/item; no separate payment made.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P1G - Major procedure - Other
MUE 2
CCS Clinical Classification 63 - Other non-OR therapeutic cardiovascular procedures

This is an add-on code that must be used in conjunction with one of these primary codes.

36475 MPFS Status: Active Code APC J1 ASC A2 CPT Assistant Article Illustration for Code Endovenous ablation therapy of incompetent vein, extremity, inclusive of all imaging guidance and monitoring, percutaneous, radiofrequency; first vein treated
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)
XS Separate structure, a service that is distinct because it was performed on a separate organ/structure
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.
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.
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.
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.)
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).
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).
53 Discontinued procedure: under certain circumstances, the physician or other qualified health care professional may elect to terminate a surgical or diagnostic procedure. due to extenuating circumstances or those that threaten the well being of the patient, it may be necessary to indicate that a surgical or diagnostic procedure was started but discontinued. this circumstance may be reported by adding modifier 53 to the code reported by the individual for the discontinued procedure. note: this modifier is not used to report the elective cancellation of a procedure prior to the patient's anesthesia induction and/or surgical preparation in the operating suite. for outpatient hospital/ambulatory surgery center (asc) 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).
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.)
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).
AQ Physician providing a service in an unlisted health professional shortage area (hpsa)
CC Procedure code change (use 'cc' when the procedure code submitted was changed either for administrative reasons or because an incorrect code was filed)
GA Waiver of liability statement issued as required by payer policy, individual case
GC This service has been performed in part by a resident under the direction of a teaching physician
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
GY Item or service statutorily excluded, does not meet the definition of any medicare benefit or, for non-medicare insurers, is not a contract benefit
GZ Item or service expected to be denied as not reasonable and necessary
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
X4 Episodic/focused services: for reporting services by clinicians who provide focused care on particular types of treatment limited to a defined period and circumstance; the patient has a problem, acute or chronic, that will be treated with surgery, radiation, or some other type of generally time-limited intervention; reporting clinician service examples include but are not limited to, the orthopedic surgeon performing a knee replacement and seeing the patient through the postoperative period
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
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
2017-01-01 Changed Long description changed. Guidelines changed.
2011-11-30 Changed AMA Guidelines revised per "Corrections Notice" for 2012.
2011-01-01 Changed Short description changed.
2005-01-01 Added First appearance in code book in 2005.
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