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Official Description

Selective catheter placement (first-order), main renal artery and any accessory renal artery(s) for renal angiography, including arterial puncture and catheter placement(s), fluoroscopy, contrast injection(s), image postprocessing, permanent recording of images, and radiological supervision and interpretation, including pressure gradient measurements when performed, and flush aortogram when performed; unilateral

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

A selective catheter placement in the main renal artery and any accessory renal arteries is a specialized procedure performed for renal angiography. This procedure involves the introduction of a catheter into the renal arteries to visualize the blood vessels supplying the kidneys. The process begins with the insertion of a catheter into an extremity artery, typically the femoral artery located in the groin area. A small incision is made at the insertion site to facilitate access. An introducer sheath is then placed into the artery, followed by the insertion of a guidewire. If the right femoral artery is selected, the guidewire is carefully navigated through the femoral and iliac arteries, advancing into the aorta under fluoroscopic guidance, which allows real-time imaging of the procedure. Once the guidewire is positioned correctly, a catheter is advanced over it into the aorta. The guidewire is then maneuvered into the main renal artery and any accessory renal arteries, allowing the physician to position the catheter precisely at the desired location for optimal imaging. After the guidewire is removed, the physician may inject radiopaque contrast media to enhance the visibility of the renal arteries during imaging. Additionally, pressure gradient measurements can be taken to assess any narrowing in the renal arteries that may be impacting blood flow to the kidneys. The entire procedure is documented through the acquisition of images, which are processed and permanently recorded. The physician subsequently reviews these images and recordings, providing a comprehensive written report of the findings. This procedure is coded as 36251 for a selective unilateral renal angiogram, while a selective bilateral study is coded as 36252.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The selective catheter placement in the main renal artery and any accessory renal arteries is indicated for various clinical scenarios, including:

  • Evaluation of Renal Artery Stenosis This procedure is performed to assess for narrowing of the renal arteries, which can lead to hypertension and renal impairment.
  • Investigation of Renal Masses It is utilized to visualize blood supply to renal tumors or masses, aiding in diagnosis and treatment planning.
  • Assessment of Renal Vascular Conditions The procedure helps in evaluating conditions such as renal artery aneurysms or arteriovenous malformations.
  • Preoperative Planning It is often indicated prior to surgical interventions on the kidneys or renal arteries to ensure proper anatomical understanding.

2. Procedure

The procedure involves several critical steps to ensure successful catheter placement and imaging:

  • Step 1: Accessing the Femoral Artery The procedure begins with the patient positioned appropriately, and a small incision is made over the femoral artery in the groin. An introducer sheath is then inserted into the artery to facilitate the introduction of the catheter.
  • Step 2: Insertion of the Guidewire A guidewire is carefully advanced through the introducer sheath into the femoral artery. Under fluoroscopic guidance, the guidewire is navigated through the femoral and iliac arteries and into the aorta, ensuring accurate placement.
  • Step 3: Advancing the Catheter Once the guidewire is in place within the aorta, a catheter is advanced over the guidewire. The physician manipulates the catheter to reach the main renal artery and any accessory renal arteries, positioning it for optimal imaging.
  • Step 4: Contrast Injection After the catheter is correctly positioned, the physician may inject radiopaque contrast media to enhance the visibility of the renal arteries during imaging. This step is crucial for obtaining clear images of the vascular structures.
  • Step 5: Pressure Gradient Measurements If necessary, pressure gradient measurements are taken to evaluate any significant narrowing in the renal arteries that could affect blood flow to the kidneys.
  • Step 6: Image Acquisition and Processing The physician obtains images of the renal arteries, which are processed and permanently recorded for further analysis. This documentation is essential for accurate diagnosis and treatment planning.
  • Step 7: Review and Reporting Finally, the physician reviews the acquired images and recordings, compiling a written report of the findings to communicate the results effectively.

3. Post-Procedure

After the procedure, patients are typically monitored for any complications related to the catheter placement, such as bleeding or infection at the insertion site. Recovery may involve observation for a few hours, and patients are advised to limit physical activity for a short period to ensure proper healing. The physician will provide specific post-procedure care instructions, including signs of complications to watch for and follow-up appointments for reviewing the results of the angiography. The written report generated from the procedure will guide further management and treatment decisions based on the findings.

Short Descr INS CATH REN ART 1ST UNILAT
Medium Descr SLCTV CATH 1STORD W/WO ART PUNCT/FLUORO/S&I UN
Long Descr Selective catheter placement (first-order), main renal artery and any accessory renal artery(s) for renal angiography, including arterial puncture and catheter placement(s), fluoroscopy, contrast injection(s), image postprocessing, permanent recording of images, and radiological supervision and interpretation, including pressure gradient measurements when performed, and flush aortogram when performed; unilateral
Status Code Active Code
Global Days 000 - Endoscopic or 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 T-Packaged Codes
ASC Payment Indicator Packaged service/item; no separate payment made.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P2F - Major procedure, cardiovascular-Other
MUE 1
CCS Clinical Classification 54 - Other vascular catheterization, not heart

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

37252 Addon Code MPFS Status: Active Code APC N ASC N1 Intravascular ultrasound (noncoronary vessel) during diagnostic evaluation and/or therapeutic intervention, including radiological supervision and interpretation; initial noncoronary vessel (List separately in addition to code for primary procedure)
37253 Addon Code MPFS Status: Active Code APC N ASC N1 Intravascular ultrasound (noncoronary vessel) during diagnostic evaluation and/or therapeutic intervention, including radiological supervision and interpretation; each additional noncoronary vessel (List separately in addition to code for primary procedure)
RT Right side (used to identify procedures performed on the right 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).
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.
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).
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.
77 Repeat procedure by another physician or other qualified health care professional: it may be necessary to indicate that a basic procedure or service was repeated by another physician or other qualified health care professional subsequent to the original procedure or service. this circumstance may be reported by adding modifier 77 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.)
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).
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
GW Service not related to the hospice patient's terminal condition
GX Notice of liability issued, voluntary under payer policy
GZ Item or service expected to be denied as not reasonable and necessary
LT Left side (used to identify procedures performed on the left side of the body)
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
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
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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2017-01-01 Changed Moderate (Conscious) Sedation flag removed. See new Moderate Sedation category.
2013-01-01 Changed Medium Descriptor changed.
2012-01-01 Added Added
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