CPT 93594Cardiology

R hrt cath chd abnl nt cnj

CPT code 93594 covers a right heart catheterization procedure performed on patients with congenital heart abnormalities that are not immediately adjacent to the heart (non-contiguous). This is a specialized diagnostic procedure where a catheter is inserted through blood vessels to examine blood flow and pressures in the right side of the heart in patients born with heart defects.

Showing rates for

National Average

Base Medicare rate

$275.27

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

6.1

PE RVU (NF)

2.19

MP RVU

0.22

Total RVU

8.51

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

NCCI bundling edits

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Billing tips

Document the specific congenital abnormality and its non-contiguous anatomical relationship to the heart chambers in the procedure report
Impact: Prevents downcoding to basic right heart catheterization (93453) which reimburses significantly less; protects full $275.27 payment
Ensure separate documentation of hemodynamic measurements, oxygen saturations at multiple sites, and cardiac output calculations specific to congenital anatomy
Impact: Meets medical necessity requirements and reduces audit risk; undocumented measurements account for 30-40% of denials
Verify diagnosis codes clearly indicate congenital heart disease (Q20-Q28 range) rather than acquired conditions
Impact: Mismatched diagnosis codes trigger automated denials in approximately 25% of claims; proper coding ensures first-pass payment
Bill facility and professional components separately when applicable, using modifiers 26 and TC appropriately based on your practice arrangement
Impact: Optimizes reimbursement by allowing both physician and facility to receive appropriate payment; prevents leaving money on the table
Review bundling edits before billing concurrent left heart catheterization codes; use modifier 59 only when truly distinct anatomical sites are evaluated
Impact: Inappropriate use of modifier 59 increases audit risk; proper use can preserve additional $300-500 in combined procedure payments
For patients with previous congenital heart surgery, document altered anatomy and technical challenges requiring additional physician work
Supports medical necessity and time-based components; may justify additional complexity codes in some payer systems

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Frequently asked questions

What is the Medicare reimbursement rate for CPT code 93594 in 2025?

The 2025 Medicare national average reimbursement for CPT 93594 is $275.27 for both facility and non-facility settings. This rate is based on 8.51 total RVUs (6.1 work RVU, 2.19 practice expense RVU, and 0.22 malpractice RVU) multiplied by the 2025 conversion factor of 32.3465.

What is the difference between CPT 93594 and 93593?

CPT 93594 is for right heart catheterization for congenital heart abnormalities that are NOT contiguous with the heart, while 93593 covers congenital abnormalities that ARE contiguous (directly connected to the heart chambers). The distinction depends on the anatomical location of the congenital defect being evaluated. Documentation must clearly specify the anatomical relationship to justify code selection.

Can CPT 93594 be billed with left heart catheterization codes on the same date?

Yes, CPT 93594 can be billed with left heart catheterization codes when both procedures are medically necessary and performed during the same session, but bundling edits may apply. Modifier 59 may be required to indicate distinct procedural services. Documentation must clearly demonstrate separate clinical indications and distinct anatomical evaluations to support billing both procedures.

What diagnosis codes support medical necessity for CPT 93594?

Congenital heart disease diagnosis codes from the ICD-10 Q20-Q28 range typically support CPT 93594, including codes for septal defects, pulmonary artery anomalies, systemic-to-pulmonary collaterals, and other congenital cardiac malformations. The diagnosis must specifically indicate a congenital (present from birth) abnormality rather than an acquired condition to justify this code.

How many RVUs is CPT code 93594 worth in 2025?

CPT 93594 has a total of 8.51 RVUs in 2025, consisting of 6.1 work RVUs, 2.19 practice expense RVUs (both facility and non-facility), and 0.22 malpractice RVUs. This represents a moderately complex procedure requiring significant physician work and expertise in congenital cardiac catheterization.

Who can bill CPT code 93594?

CPT 93594 can be billed by board-certified pediatric cardiologists, adult congenital cardiologists, and interventional cardiologists with specific training in congenital heart disease who perform or directly supervise the procedure. The procedure must be performed in an appropriately equipped cardiac catheterization laboratory with capabilities for congenital heart procedures.

What documentation is required to bill CPT 93594 instead of routine right heart catheterization?

Documentation must include a detailed description of the specific congenital cardiac abnormality, clear specification that the abnormality is non-contiguous with the heart chambers, hemodynamic measurements from multiple cardiac sites, oxygen saturation data demonstrating shunt evaluation if applicable, and interpretation of findings in the context of the congenital diagnosis. Simply having a congenital diagnosis is insufficient; the procedure report must demonstrate evaluation of the non-contiguous abnormality.