CPT 93566Cardiology

Njx car cth slctv rv/ra ang

CPT code 93566 represents the injection of contrast dye into the right side of the heart (right ventricle or right atrium) during a cardiac catheterization procedure to create specialized X-ray images (angiography) of these chambers.

Showing rates for

National Average

Base Medicare rate

$24.58

This calculator gives a typical-case estimate using standard Medicare modifier rules. Actual payment depends on payer policies, documentation, code-specific CMS status indicators, and locality. Verify before billing.

RVU breakdown

Work RVU

0.5

PE RVU (NF)

0.18

MP RVU

0.08

Total RVU

0.76

Conversion factor: 32.3465 · Source: CMS MPFS RVU25A · Confidence: High

NCCI bundling edits

Loading bundling edits…

Billing tips

Always bill 93566 as an add-on code with a primary catheterization procedure code (93451-93461, 93530-93533). Never bill as standalone.
Impact: Prevents automatic denial; 93566 is listed as an add-on code and will reject without appropriate primary procedure
Document the specific chamber injected (right ventricle vs right atrium), volume of contrast used, and clinical indication for selective injection separate from any right heart catheter placement.
Impact: Reduces denial risk by 60-70%; payers frequently audit for duplicate billing with basic catheterization codes
Verify National Correct Coding Initiative (NCCI) edits before billing with multiple injection codes (93563-93568) to determine if modifier 59/XU is needed.
Impact: Prevents bundling denials; improper modifier use can delay payment 30-60 days pending review
For pediatric congenital cases, ensure diagnosis codes clearly support medical necessity for selective right-sided angiography beyond standard hemodynamic assessment.
Impact: Critical for payment; congenital heart disease codes (Q20-Q26) typically support medical necessity better than generic heart failure codes
Bill facility and professional components separately when applicable; verify if your practice owns the cath lab equipment or if hospital bills technical component.
Impact: Ensures correct payment allocation; billing both components when hospital owns equipment causes overpayment recovery
Review operative report to confirm imaging was actually obtained and interpreted; simple contrast injection without imaging documentation will not support 93566.

Live Field Datano reports yet

Real billers contribute denial patterns and appeal strategies for this code. Once 5+ reports come in, you’ll see live aggregated data here — the only place this exists, free.

Working with CPT 93566?

Get the free Revenue Protection Toolkit — the denial triggers, modifier pitfalls, and bundling conflicts that quietly cost you reimbursement. Instant download.

Help build the field knowledge

MedPayIQ gets smarter as billers contribute. If you've had this code denied, share what happened so others learn from it. Anonymous, no patient info.

Related actions

Frequently asked questions

What is the Medicare reimbursement rate for CPT 93566 in 2025?

The 2025 Medicare national average reimbursement rate for CPT 93566 is $24.58 for both facility and non-facility settings. This rate is based on 0.76 total RVUs multiplied by the 2025 conversion factor of 32.3465. Actual reimbursement may vary by geographic locality based on the Medicare Geographic Practice Cost Index (GPCI).

Can CPT 93566 be billed alone without another procedure code?

No, CPT 93566 is an add-on code and cannot be billed independently. It must be reported with a primary cardiac catheterization procedure code such as 93451-93461 or 93530-93533. Billing 93566 without an appropriate primary procedure will result in automatic claim denial.

What is the difference between CPT 93566 and other cardiac injection codes?

CPT 93566 specifically describes selective injection into the right ventricle or right atrium for angiography. CPT 93563 covers injection for selective left ventricular angiography, 93565 covers left atrial injection, 93567 covers supravalvular aortography, and 93568 covers pulmonary angiography. Each code represents injection into a different anatomic location and requires separate documentation.

How many work RVUs is CPT 93566 worth?

CPT 93566 has a work RVU value of 0.5 for 2025. The total RVU is 0.76, which includes 0.5 work RVU, 0.18 practice expense RVU (both facility and non-facility), and 0.08 malpractice RVU.

What documentation is required to support billing CPT 93566?

Required documentation includes identification of the specific chamber injected (right ventricle or right atrium), type and volume of contrast used, selective catheter placement technique, angiographic views obtained, clinical indication for the selective injection, and physician interpretation of the angiographic findings. The documentation must clearly distinguish the selective injection from routine catheter positioning during the primary catheterization procedure.

Can CPT 93566 be billed with modifier 26 for professional component only?

Yes, modifier 26 can be appended to CPT 93566 when billing only the professional component (physician interpretation) separately from the technical component. This typically occurs when the facility bills the technical component for equipment and staff. The reimbursement is reduced to reflect only the professional component, typically 40-60% of the total allowable.

What are common reasons for denial of CPT 93566 claims?

Common denial reasons include billing without an appropriate primary catheterization code, lack of medical necessity documentation distinguishing selective injection from basic catheterization, bundling with other injection codes due to NCCI edits without proper modifiers, and insufficient documentation of imaging obtained and interpreted. Each denial type requires specific appeal strategies with supporting documentation.