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CPT 93563 covers the injection procedure during cardiac catheterization used to visualize coronary arteries through selective angiography. This code represents the technical work of injecting contrast dye into specific coronary vessels to create detailed images of blood flow.
RVU breakdown
Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High
Billing tips
Bill 93563 separately for each selective coronary artery injection performed (right coronary, left main, left anterior descending, circumflex, bypass grafts)
Impact: Can increase reimbursement by $48.84 per additional vessel injected; typical diagnostic procedure involves 2-4 injections totaling $97.68-$195.36
Ensure documentation clearly specifies each vessel selectively catheterized and injected with contrast, not just vessels visualized
Impact: Prevents denials for lack of medical necessity; underdocumentation can result in downcoding to single injection only, losing $48.84-$146.52 per case
Do not bill 93563 with 93454-93461 (comprehensive catheterization codes) as these bundles already include selective injections
Impact: Unbundling will result in 100% denial of 93563 charges; use 93563 only when billing component codes separately or for additional injections beyond what's included
Verify payer-specific policies on maximum billable units per session, as some limit to 3-4 selective injections
Impact: Exceeding payer limits without prior authorization can result in denial of excess units; typically affects 10-15% of complex cases with multiple grafts
Report 93563 in addition to add-on codes like 93564 for each additional selective injection when appropriate
Impact: 93564 reimburses at lower rate for 2nd and subsequent injections; correct sequencing maximizes appropriate payment
Use time-based documentation showing separate catheter repositioning for each selective injection to support multiple units
Impact: Strengthens medical necessity documentation for multiple injections; reduces audit risk and supports appeals for denied additional units
Common denials
Bundling denial when billed with comprehensive cardiac catheterization codes (93454-93461)
How to appeal: Review the comprehensive code descriptor to confirm selective injections are included; only appeal if additional injections beyond standard protocol were performed and documented as medically necessary with separate vessel identification
Excessive units denial when multiple injections claimed without adequate documentation of distinct vessel catheterization
How to appeal: Submit operative report highlighting specific documentation of catheter repositioning into each named vessel ostium with separate contrast injection; include fluoroscopy timestamps showing distinct injections
Medical necessity denial for repeat injections in same vessel during single session
How to appeal: Provide clinical rationale for repeat injection (inadequate initial opacification, arrhythmia during first injection, need for additional projections); include physician attestation of medical necessity
Lack of documentation supporting selective versus non-selective injection
How to appeal: Submit catheterization report clearly documenting selective engagement of coronary ostium, catheter size and type used, and specific vessel injected; distinguish from non-selective aortic root injections
Frequently asked questions
What is the Medicare reimbursement rate for CPT 93563 in 2025?
The 2025 Medicare national average payment rate for CPT 93563 is $48.84 for both facility and non-facility settings, based on 1.51 total RVUs and the 2025 conversion factor of 32.3465.
How many times can CPT 93563 be billed per catheterization procedure?
CPT 93563 can be billed once for each selective coronary artery injection performed. A typical diagnostic catheterization involves 2-4 selective injections (right coronary, left main, and potentially separate injections for LAD and circumflex), though the exact number depends on patient anatomy and clinical indication.
Can CPT 93563 be billed with cardiac catheterization codes 93454-93461?
No, CPT 93563 should not be billed separately when using comprehensive cardiac catheterization codes (93454-93461), as these codes already include selective coronary angiography injections in their descriptors. Billing both together will result in bundling denials.
What is the difference between CPT 93563 and 93564?
CPT 93563 is for the initial selective coronary angiography injection, while 93564 is an add-on code for each additional selective injection during the same session. Code 93564 should be reported in conjunction with 93563 and is listed separately for the second and subsequent vessels injected.
What documentation is required to bill multiple units of CPT 93563?
Documentation must clearly identify each vessel selectively catheterized, describe catheter repositioning into each specific coronary ostium, specify contrast injection for each vessel, and include angiographic findings for each injection. Simply visualizing multiple vessels from one injection does not support billing multiple units.
Does CPT 93563 include both professional and technical components?
Yes, CPT 93563 is a complete procedure code that includes both professional (physician work of performing injection and interpretation) and technical components (equipment, contrast material, supplies). Modifier 26 or TC can be appended when billing components separately.
What are the RVU values for CPT code 93563 in 2025?
For 2025, CPT 93563 has a work RVU of 1.00, practice expense RVU of 0.35 (both facility and non-facility), and malpractice RVU of 0.16, for a total of 1.51 RVUs. These values are from the CMS Medicare Physician Fee Schedule RVU25A released December 23, 2024.