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Official Description

Arteriovenous anastomosis, open; direct, any site (eg, Cimino type) (separate procedure)

© Copyright 2026 American Medical Association. All rights reserved.

Common Language Description

A direct arteriovenous anastomosis is a surgical procedure that creates a connection between an artery and a vein, allowing for increased blood flow to the vein. This is particularly important for patients requiring hemodialysis, as it provides a reliable access point for the dialysis process. The procedure is commonly known as a Cimino-type arteriovenous anastomosis or Cimino fistula, named after Dr. Belding H. Scribner, who developed this technique to improve dialysis access. The most frequently chosen site for this procedure is at the wrist, although other locations in the arm may also be utilized based on the patient's anatomy and clinical considerations. During the procedure, local anesthesia or a brachial plexus nerve block is typically administered to minimize discomfort. The surgical technique involves careful dissection and connection of the radial artery and the cephalic vein, ensuring that the anastomosis is performed in a manner that optimizes blood flow and minimizes complications. This procedure is classified as a separate procedure, indicating that it is distinct from other surgical interventions that may be performed concurrently.

© Copyright 2026 Coding Ahead. All rights reserved.

1. Indications

The direct arteriovenous anastomosis procedure is indicated for patients who require hemodialysis access. This procedure is particularly beneficial for individuals with chronic kidney disease or end-stage renal disease who need a reliable vascular access point for dialysis treatment. The following conditions may warrant the performance of this procedure:

  • Chronic Kidney Disease (CKD) Patients with advanced stages of CKD often require hemodialysis to manage their condition and maintain kidney function.
  • End-Stage Renal Disease (ESRD) Individuals diagnosed with ESRD typically need hemodialysis as a life-sustaining treatment, necessitating the creation of a vascular access point.
  • Need for Reliable Vascular Access Patients who have exhausted other options for vascular access may require a Cimino fistula to ensure effective dialysis treatment.

2. Procedure

The procedure for creating a direct arteriovenous anastomosis involves several critical steps to ensure successful access for hemodialysis. Each step is performed with precision to optimize the outcome.

  • Step 1: Anesthesia Administration The procedure begins with the administration of local infiltration anesthetic or a brachial plexus nerve block to minimize discomfort during the surgery.
  • Step 2: Arm Preparation The patient's arm is prepared by palpating the pulses and applying a blood pressure cuff to the upper arm. This action restricts blood flow, making the veins more prominent and easier to identify.
  • Step 3: Vein Marking The cephalic vein is marked using indelible ink to guide the surgical incision and ensure accurate dissection during the procedure.
  • Step 4: Incision and Exposure A longitudinal incision is made in the skin over the radial artery to expose it adequately. This incision allows the surgeon to access both the artery and the vein for the anastomosis.
  • Step 5: Vein Dissection The cephalic vein is carefully dissected free from subcutaneous fat, and any tributaries are ligated to prepare the vein for connection to the artery.
  • Step 6: Mobilization of the Artery The radial artery is mobilized to facilitate the anastomosis. This step is crucial for ensuring that the artery can be adequately connected to the vein.
  • Step 7: Anastomosis Creation The artery and vein are then connected (anastomosed) in one of four configurations: side-to-side, arterial end to vein side, vein end to arterial side, or end-to-end. The specific configuration is chosen based on the anatomy and clinical considerations.
  • Step 8: Suturing A fistula is created by incising the vein and/or artery, depending on the chosen configuration, and suturing the vein and artery together to establish a functional connection.

3. Post-Procedure

After the completion of the arteriovenous anastomosis, the patient is monitored for any immediate complications. Post-procedure care typically includes observing the site for signs of infection, ensuring proper blood flow through the newly created fistula, and managing any discomfort. Patients may be advised on how to care for the access site and the importance of monitoring for any changes in the fistula's function. Follow-up appointments are essential to assess the patency of the fistula and to plan for the initiation of hemodialysis when appropriate.

Short Descr AV FUSION DIRECT ANY SITE
Medium Descr ARTERIOVENOUS ANASTOMOSIS OPEN DIRECT
Long Descr Arteriovenous anastomosis, open; direct, any site (eg, Cimino type) (separate procedure)
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) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
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) 1 - Co-surgeons could be paid, though supporting documentation is required...
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) P2F - Major procedure, cardiovascular-Other
MUE 2
CCS Clinical Classification 57 - Creation, revision and removal of arteriovenous fistula or vessel-to-vessel cannula for dialysis

This is a primary code that can be used with these additional add-on codes.

36907 CPT Add On MPFS Status: Active Code APC N ASC N1 Transluminal balloon angioplasty, central dialysis segment, performed through dialysis circuit, including all imaging and radiological supervision and interpretation required to perform the angioplasty (List separately in addition to code for primary procedure)
36908 CPT Add On MPFS Status: Active Code APC N ASC N1 Transcatheter placement of intravascular stent(s), central dialysis segment, performed through dialysis circuit, including all imaging and radiological supervision and interpretation required to perform the stenting, and all angioplasty in the central dialysis segment (List separately in addition to code for primary procedure)
LT Left side (used to identify procedures performed on the left side of the body)
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
RT Right side (used to identify procedures performed on the right side of the body)
80 Assistant surgeon: surgical assistant services may be identified by adding modifier 80 to the usual procedure number(s).
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.
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.)
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).
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).
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.
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).
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.
73 Discontinued out-patient hospital/ambulatory surgery center (asc) procedure prior to the administration of anesthesia: due to extenuating circumstances or those that threaten the well being of the patient, the physician may cancel a surgical or diagnostic procedure subsequent to the patient's surgical preparation (including sedation when provided, and being taken to the room where the procedure is to be performed), but prior to the administration of anesthesia (local, regional block(s) or general). under these circumstances, the intended service that is prepared for but cancelled can be reported by its usual procedure number and the addition of modifier 73. note: the elective cancellation of a service prior to the administration of anesthesia and/or surgical preparation of the patient should not be reported. for physician reporting of a discontinued procedure, see modifier 53.
74 Discontinued out-patient hospital/ambulatory surgery center (asc) procedure after administration of anesthesia: due to extenuating circumstances or those that threaten the well being of the patient, the physician may terminate a surgical or diagnostic procedure after the administration of anesthesia (local, regional block(s), general) or after the procedure was started (incision made, intubation started, scope inserted, etc). under these circumstances, the procedure started but terminated can be reported by its usual procedure number and the addition of modifier 74. note: the elective cancellation of a service prior to the administration of anesthesia and/or surgical preparation of the patient should not be reported. for physician reporting of a discontinued procedure, see modifier 53.
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.)
81 Minimum assistant surgeon: minimum surgical assistant services are identified by adding modifier 81 to the usual procedure number.
AG Primary physician
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)
CR Catastrophe/disaster related
GA Waiver of liability statement issued as required by payer policy, individual case
GV Attending physician not employed or paid under arrangement by the patient's hospice provider
GW Service not related to the hospice patient's terminal condition
Q0 Investigational clinical service provided in a clinical research study that is in an approved clinical research study
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
SG Ambulatory surgical center (asc) facility service
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
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
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2011-01-01 Changed Medium description changed.
Pre-1990 Added Code added.
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