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Official Description

Injection procedure during cardiac catheterization including imaging supervision, interpretation, and report; for selective pulmonary arterial angiography, bilateral (List separately in addition to code for primary procedure)

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

The CPT® Code 93573 refers to an injection procedure performed during cardiac catheterization specifically for selective pulmonary arterial angiography on a bilateral basis. This procedure is typically conducted in conjunction with a primary right heart catheterization, which is a diagnostic technique used to assess the heart's function and blood flow. The selective pulmonary arterial angiography is particularly relevant for evaluating congenital heart defects, especially in pediatric patients, although it can also be applicable to adults with acquired conditions. During this procedure, a diagnostic catheter is strategically positioned within the main pulmonary artery, allowing for the administration of contrast media. This contrast agent is essential for opacifying the pulmonary artery, enabling detailed visualization of its structure and function. The procedure aims to identify any abnormalities such as valve regurgitation, irregular blood flow, or vascular anomalies. The process involves careful monitoring of the patient's vital signs, including arterial pressure, heart rhythm, and oxygen saturation, throughout the procedure and during the recovery phase to ensure patient safety and to detect any potential complications, such as allergic reactions or kidney damage. The results of the angiography are meticulously reviewed by the physician, who provides a comprehensive written interpretation of the findings, which is crucial for guiding further clinical decisions.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The procedure associated with CPT® Code 93573 is indicated for the following conditions:

  • Congenital Heart Defects - This procedure is often performed on pediatric patients to evaluate structural abnormalities in the heart and pulmonary arteries.
  • Acquired Conditions - Adults with conditions affecting the pulmonary arteries may also require this angiography to assess their heart function and blood flow.
  • Assessment of Valve Regurgitation - The procedure helps in evaluating any regurgitation occurring at the pulmonary valve, which can impact overall cardiac function.
  • Evaluation of Blood Flow - It is used to assess branching blood flow within the pulmonary arteries, which is critical for diagnosing various cardiovascular issues.
  • Detection of Vessel Abnormalities - The angiography can identify any abnormalities in the vessels, such as stenosis or other structural issues that may require intervention.

2. Procedure

The procedure for CPT® Code 93573 involves several critical steps to ensure accurate and effective selective pulmonary arterial angiography:

  • Step 1: Catheter Positioning - A diagnostic catheter is first positioned in the main pulmonary artery. This positioning is crucial as it allows for the effective delivery of contrast media into the pulmonary circulation.
  • Step 2: Connection to Power Injector - The catheter is then connected to a power injector, which is used to administer the contrast media. This connection is essential for achieving the necessary pressure and volume of contrast for optimal imaging.
  • Step 3: Contrast Media Injection - Contrast media is injected at specific locations to opacify the main pulmonary artery. This step is vital for visualizing the artery and assessing its structure and function.
  • Step 4: Selective Catheterization - For more detailed imaging, a guidewire is introduced through the diagnostic catheter into a distal segmental branch of the pulmonary artery. This allows for selective, unilateral catheterization, which can provide more focused information about specific areas of concern.
  • Step 5: Manual Contrast Injection or Catheter Exchange - The guidewire may be removed, and a manual contrast injection can be performed, or the catheter can be exchanged for an angiographic catheter. This step ensures that the catheter is optimally positioned for the best imaging results.
  • Step 6: Repeat Injection from Different Angles - If necessary, the injection may be repeated from different angles to thoroughly assess any suspected defects, such as pulmonary branch stenosis, particularly following surgical repairs like those for Tetralogy of Fallot.
  • Step 7: Image Processing and Review - The resulting angiograms are processed and reviewed by the physician, who will interpret the findings and document them in a written report.

3. Post-Procedure

After the completion of the selective pulmonary arterial angiography, the patient is closely monitored for any potential complications. This includes observing for allergic reactions to the contrast media, arrhythmias, or signs of kidney damage, which can occur due to the contrast agent used during the procedure. The patient's arterial pressure, heart rhythm, and oxygen levels are continuously assessed to ensure stability. Recovery may vary depending on the individual patient's condition, but careful monitoring is essential to address any immediate post-procedural concerns. The physician will provide instructions for follow-up care and any necessary additional evaluations based on the findings from the angiography.

Short Descr NJX CATH SLCT P-ART ANGRP BI
Medium Descr NJX DRG C-CATHJ SLCTV P-ART ANGIOGRAPHY BI
Long Descr Injection procedure during cardiac catheterization including imaging supervision, interpretation, and report; for selective pulmonary arterial angiography, bilateral (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) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 0 - 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
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) none
MUE 1

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

33361 MPFS Status: Active Code APC C Transcatheter aortic valve replacement (TAVR/TAVI) with prosthetic valve; percutaneous femoral artery approach
33362 MPFS Status: Active Code APC C Transcatheter aortic valve replacement (TAVR/TAVI) with prosthetic valve; open femoral artery approach
33363 MPFS Status: Active Code APC C Transcatheter aortic valve replacement (TAVR/TAVI) with prosthetic valve; open axillary artery approach
33364 MPFS Status: Active Code APC C Transcatheter aortic valve replacement (TAVR/TAVI) with prosthetic valve; open iliac artery approach
33365 MPFS Status: Active Code APC C Transcatheter aortic valve replacement (TAVR/TAVI) with prosthetic valve; transaortic approach (eg, median sternotomy, mediastinotomy)
33366 MPFS Status: Active Code APC C Transcatheter aortic valve replacement (TAVR/TAVI) with prosthetic valve; transapical exposure (eg, left thoracotomy)
33418 MPFS Status: Active Code APC C Transcatheter mitral valve repair, percutaneous approach, including transseptal puncture when performed; initial prosthesis
33419 Addon Code MPFS Status: Active Code APC N ASC N1 Transcatheter mitral valve repair, percutaneous approach, including transseptal puncture when performed; additional prosthesis(es) during same session (List separately in addition to code for primary procedure)
33477 MPFS Status: Active Code APC C Transcatheter pulmonary valve implantation, percutaneous approach, including pre-stenting of the valve delivery site, when performed
33741 Modifier 63 Exempt MPFS Status: Active Code APC C Transcatheter atrial septostomy (TAS) for congenital cardiac anomalies to create effective atrial flow, including all imaging guidance by the proceduralist, when performed, any method (eg, Rashkind, Sang-Park, balloon, cutting balloon, blade)
33745 MPFS Status: Active Code APC C Transcatheter intracardiac shunt (TIS) creation by stent placement for congenital cardiac anomalies to establish effective intracardiac flow, including all imaging guidance by the proceduralist, when performed, left and right heart diagnostic cardiac catheterization for congenital cardiac anomalies, and target zone angioplasty, when performed (eg, atrial septum, Fontan fenestration, right ventricular outflow tract, Mustard/Senning/Warden baffles); initial intracardiac shunt
33894 MPFS Status: Active Code APC C Endovascular stent repair of coarctation of the ascending, transverse, or descending thoracic or abdominal aorta, involving stent placement; across major side branches
33895 MPFS Status: Active Code APC C Endovascular stent repair of coarctation of the ascending, transverse, or descending thoracic or abdominal aorta, involving stent placement; not crossing major side branches
33900 MPFS Status: Active Code APC J1 ASC J8 Percutaneous pulmonary artery revascularization by stent placement, initial; normal native connections, unilateral
33901 MPFS Status: Active Code APC J1 ASC J8 Percutaneous pulmonary artery revascularization by stent placement, initial; normal native connections, bilateral
33902 MPFS Status: Active Code APC J1 ASC J8 Percutaneous pulmonary artery revascularization by stent placement, initial; abnormal connections, unilateral
33903 MPFS Status: Active Code APC J1 ASC J8 Percutaneous pulmonary artery revascularization by stent placement, initial; abnormal connections, bilateral
33904 Add-on Code MPFS Status: Active Code APC N Percutaneous pulmonary artery revascularization by stent placement, each additional vessel or separate lesion, normal or abnormal connections (List separately in addition to code for primary procedure)
37187 MPFS Status: Active Code APC J1 ASC J8 Physician Quality Reporting Illustration for Code Percutaneous transluminal mechanical thrombectomy, vein(s), including intraprocedural pharmacological thrombolytic injections and fluoroscopic guidance
37188 MPFS Status: Active Code APC J1 ASC J8 Physician Quality Reporting Illustration for Code Percutaneous transluminal mechanical thrombectomy, vein(s), including intraprocedural pharmacological thrombolytic injections and fluoroscopic guidance, repeat treatment on subsequent day during course of thrombolytic therapy
37236 MPFS Status: Active Code APC J1 ASC J8 Transcatheter placement of an intravascular stent(s) (except lower extremity artery(s) for occlusive disease, cervical carotid, extracranial vertebral or intrathoracic carotid, intracranial, or coronary), open or percutaneous, including radiological supervision and interpretation and including all angioplasty within the same vessel, when performed; initial artery
37237 Addon Code MPFS Status: Active Code APC N ASC N1 Transcatheter placement of an intravascular stent(s) (except lower extremity artery(s) for occlusive disease, cervical carotid, extracranial vertebral or intrathoracic carotid, intracranial, or coronary), open or percutaneous, including radiological supervision and interpretation and including all angioplasty within the same vessel, when performed; each additional artery (List separately in addition to code for primary procedure)
37238 MPFS Status: Active Code APC J1 ASC J8 Transcatheter placement of an intravascular stent(s), open or percutaneous, including radiological supervision and interpretation and including angioplasty within the same vessel, when performed; initial vein
37246 CPT Resequenced MPFS Status: Active Code APC J1 ASC J8 Transluminal balloon angioplasty (except lower extremity artery(ies) for occlusive disease, intracranial, coronary, pulmonary, or dialysis circuit), open or percutaneous, including all imaging and radiological supervision and interpretation necessary to perform the angioplasty within the same artery; initial artery
37248 CPT Resequenced MPFS Status: Active Code APC J1 ASC J8 Transluminal balloon angioplasty (except dialysis circuit), open or percutaneous, including all imaging and radiological supervision and interpretation necessary to perform the angioplasty within the same vein; initial vein
92997 MPFS Status: Active Code APC J1 CPT Assistant Article Illustration for Code Percutaneous transluminal pulmonary artery balloon angioplasty; single vessel
92998 Addon Code MPFS Status: Active Code APC N CPT Assistant Article Illustration for Code Percutaneous transluminal pulmonary artery balloon angioplasty; each additional vessel (List separately in addition to code for primary procedure)
93451 MPFS Status: Active Code APC J1 ASC G2 Right heart catheterization including measurement(s) of oxygen saturation and cardiac output, when performed
93453 MPFS Status: Active Code APC J1 ASC G2 Combined right and left heart catheterization including intraprocedural injection(s) for left ventriculography, imaging supervision and interpretation, when performed
93456 MPFS Status: Active Code APC J1 ASC G2 Catheter placement in coronary artery(s) for coronary angiography, including intraprocedural injection(s) for coronary angiography, imaging supervision and interpretation; with right heart catheterization
93457 MPFS Status: Active Code APC J1 ASC G2 Catheter placement in coronary artery(s) for coronary angiography, including intraprocedural injection(s) for coronary angiography, imaging supervision and interpretation; with catheter placement(s) in bypass graft(s) (internal mammary, free arterial, venous grafts) including intraprocedural injection(s) for bypass graft angiography and right heart catheterization
93460 MPFS Status: Active Code APC J1 ASC G2 Catheter placement in coronary artery(s) for coronary angiography, including intraprocedural injection(s) for coronary angiography, imaging supervision and interpretation; with right and left heart catheterization including intraprocedural injection(s) for left ventriculography, when performed
93461 MPFS Status: Active Code APC J1 ASC G2 Catheter placement in coronary artery(s) for coronary angiography, including intraprocedural injection(s) for coronary angiography, imaging supervision and interpretation; with right and left heart catheterization including intraprocedural injection(s) for left ventriculography, when performed, catheter placement(s) in bypass graft(s) (internal mammary, free arterial, venous grafts) with bypass graft angiography
93505 MPFS Status: Active Code APC J1 CPT Assistant Article Illustration for Code Endomyocardial biopsy
93580 MPFS Status: Active Code APC J1 CPT Assistant Article Illustration for Code Percutaneous transcatheter closure of congenital interatrial communication (ie, Fontan fenestration, atrial septal defect) with implant
93581 MPFS Status: Active Code APC J1 CPT Assistant Article Illustration for Code Percutaneous transcatheter closure of a congenital ventricular septal defect with implant
93582 MPFS Status: Active Code APC J1 Percutaneous transcatheter closure of patent ductus arteriosus
93583 MPFS Status: Active Code APC C Percutaneous transcatheter septal reduction therapy (eg, alcohol septal ablation) including temporary pacemaker insertion when performed
93593 MPFS Status: Carrier Priced APC J1 Right heart catheterization for congenital heart defect(s) including imaging guidance by the proceduralist to advance the catheter to the target zone; normal native connections
93594 MPFS Status: Carrier Priced APC J1 Right heart catheterization for congenital heart defect(s) including imaging guidance by the proceduralist to advance the catheter to the target zone; abnormal native connections
93595 MPFS Status: Carrier Priced APC J1 Left heart catheterization for congenital heart defect(s) including imaging guidance by the proceduralist to advance the catheter to the target zone, normal or abnormal native connections
93596 MPFS Status: Carrier Priced APC J1 Right and left heart catheterization for congenital heart defect(s) including imaging guidance by the proceduralist to advance the catheter to the target zone(s); normal native connections
93597 MPFS Status: Carrier Priced APC J1 Right and left heart catheterization for congenital heart defect(s) including imaging guidance by the proceduralist to advance the catheter to the target zone(s); abnormal native connections
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.
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).
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)
Q1 Routine clinical service provided in a clinical research study that is in an approved clinical research study
RT Right side (used to identify procedures performed on the right side of the body)
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
2023-01-01 Added Code added.
Code
Description
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