L hrt artery/ventricle angio
CPT 93458 covers a left heart catheterization procedure where a cardiologist inserts a thin tube through blood vessels to examine the left side of the heart and its arteries, including taking X-ray images of the heart's pumping chamber (ventricle).
RVU breakdown
Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High
Billing tips
Verify that both left ventriculography AND coronary angiography were performed; if only one component completed, use 93454 (catheter placement with angiography) or 93455 (catheter placement with ventriculography) instead
Impact: Incorrect code selection can result in overpayment audits or underpayment by $200-400 per procedure
Do not bill 93458 with add-on codes 93563-93568 for injection procedures; these are included in the base code when performed on the same vessel/chamber
Impact: Unbundling violations can trigger $962.96 recoupment plus potential False Claims Act penalties
Bill global code 93458 in non-facility settings; in hospital settings, append modifier 26 for professional component only to receive appropriate split reimbursement
Impact: Both facility and non-facility rates are $962.96 for global service; modifier 26 reduces to professional component portion only
Document the number of coronary arteries and branches visualized, specific injection sites, ventricular function assessment, and any abnormal findings to support medical necessity
Impact: Incomplete documentation is the primary cause of audits; comprehensive documentation prevents denials and supports the 5.6 work RVUs
When right heart catheterization is medically necessary on the same date, bill 93453 (combined right and left heart cath with ventriculography) instead of 93458 plus separate right heart code
Impact: Using the comprehensive code prevents bundling edits and ensures full reimbursement rather than reduced bundled payment
Submit claims within 30 days of service with complete catheterization report, imaging documentation, and pre-procedure diagnostic workup justifying invasive assessment
Impact: Timely filing with complete documentation reduces denial rate from industry average 8-12% to under 3%
Common denials
Medical necessity not established - lack of prior non-invasive testing or inadequate indication documentation
How to appeal: Submit appeal with stress test results, echocardiogram findings, clinical symptoms documentation, and published guidelines (ACC/AHA appropriateness criteria) supporting invasive assessment. Include cardiologist letter explaining why non-invasive testing was insufficient.
Bundling with percutaneous coronary intervention (PCI) codes when diagnostic catheterization and intervention performed same session
How to appeal: Append modifier 59 to 93458 and provide documentation showing: (1) diagnostic catheterization decision was made prior to intervention, (2) full diagnostic study was completed before intervention decision, and (3) separate clinical indication existed for diagnostic portion. Many payers require pre-authorization for same-day diagnostic and interventional procedures.
Duplicate service denial when billed with other cardiac catheterization codes from same family (93451-93461)
How to appeal: Review code selection to ensure most comprehensive appropriate code was billed. If multiple distinct procedures were truly performed, provide operative report with clear documentation of separate sessions, different access sites, or distinct clinical indications. Consider if comprehensive combination code (93453, 93460, 93461) should have been used instead.
Insufficient documentation of left ventriculography or coronary angiography components required for 93458
How to appeal: Submit complete catheterization report with: left ventricular injection documentation, ventriculogram interpretation, number and identification of coronary arteries injected, filming protocols, hemodynamic measurements, and physician interpretation. If component was not performed, accept downcoding to appropriate lesser code (93454 or 93455) and implement prospective documentation improvement.
Frequently asked questions
What is the Medicare reimbursement rate for CPT 93458 in 2025?
The 2025 Medicare national average payment for CPT 93458 is $962.96 for both facility and non-facility settings. This rate is based on 29.77 total RVUs multiplied by the 2025 conversion factor of 32.3465. Actual reimbursement may vary by geographic locality based on Geographic Practice Cost Indices (GPCIs).
Can CPT 93458 be billed with PCI codes on the same date of service?
Yes, but with restrictions. When diagnostic catheterization (93458) reveals coronary disease requiring immediate intervention, you may bill both the diagnostic and PCI codes with modifier 59 appended to 93458. Documentation must clearly show the diagnostic study was complete and a separate decision was made to proceed with intervention. Many Medicare contractors have specific coverage policies requiring pre-authorization or limiting same-day billing.
What is the difference between CPT 93458 and 93459?
CPT 93458 includes left heart catheterization with left ventriculography and coronary angiography examining one or more coronary arteries, while CPT 93459 adds bypass graft angiography (one or more grafts) to the same components. Use 93459 when the patient has previous coronary artery bypass surgery and both native coronary arteries and bypass grafts are studied.
How many RVUs is CPT code 93458 worth?
CPT 93458 has a total of 29.77 RVUs for 2025, consisting of 5.6 work RVUs, 23.08 practice expense RVUs (both facility and non-facility), and 1.09 malpractice RVUs. This is one of the higher RVU values in cardiology, reflecting the complexity and physician work involved in diagnostic cardiac catheterization.
What documentation is required to bill CPT 93458?
Required documentation includes: clinical indication with supporting pre-procedure testing, informed consent, arterial access site/approach, catheter specifications, complete listing of coronary arteries visualized with injection details, left ventriculography documentation with technique and interpretation, hemodynamic measurements, coronary anatomy interpretation with stenosis quantification, left ventricular function assessment, fluoroscopy time, contrast volume, and post-procedure status. Both the ventriculography and coronary angiography components must be documented to support 93458.
Does CPT 93458 include right heart catheterization?
No, CPT 93458 includes only left heart catheterization (left ventricle and coronary arteries). If both right and left heart catheterization with coronary angiography and left ventriculography are performed, use CPT 93453 instead. Do not bill 93458 and a separate right heart catheterization code together, as this creates a bundling violation.
What are common modifiers used with CPT 93458?
Common modifiers include: modifier 26 (professional component only when physician doesn't own equipment), modifier TC (technical component for facility), modifier 59 (distinct procedural service when billed with PCI or other procedures), modifier 53 (discontinued procedure), and modifier 22 (increased procedural services for unusual complexity). Modifier 59 requires exceptional documentation to avoid audit scrutiny when used with same-day interventional procedures.