CPT 78466Radiology

Heart infarct image

CPT code 78466 is used for nuclear medicine imaging of the heart to detect dead or damaged heart tissue following a heart attack. This specialized scan helps doctors determine the extent and location of heart muscle injury.

Showing rates for

National Average

Base Medicare rate

$154.94

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

0.69

PE RVU (NF)

4.04

MP RVU

0.06

Total RVU

4.79

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

NCCI bundling edits

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Billing tips

Always verify whether billing global service (no modifier), professional component only (modifier 26), or technical component only (modifier TC) based on your practice arrangement
Impact: Incorrect component billing can result in 70-80% underpayment or overpayment requiring refunds
Document the specific radiopharmaceutical used and dosage administered, as this supports medical necessity and proper coding versus other cardiac imaging codes
Impact: Missing radiopharmaceutical documentation is a leading cause of denials and downcoding to lower-paying codes
Link to appropriate ICD-10 codes for acute myocardial infarction (I21.x series) or suspected MI to establish medical necessity
Impact: Improper diagnosis coding leads to approximately 35% of initial denials for this procedure
Bill within 24-48 hours of service performance as delayed billing can trigger payer scrutiny regarding medical necessity timing
Impact: Timely billing supports the acute nature of the service and reduces coordination of benefits issues
Do not unbundle with other nuclear cardiology codes performed on same day unless separate sessions with distinct clinical indications are documented
Impact: Unbundling violations can trigger audits and recoupment of $154.94 plus penalties
Verify pre-authorization requirements with commercial payers before performing study, as many require prior approval for nuclear cardiology procedures
Impact: Missing pre-authorization results in automatic denial of the $154.94 charge requiring lengthy appeals

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Frequently asked questions

What is the Medicare reimbursement rate for CPT code 78466 in 2025?

The 2025 Medicare national average reimbursement rate for CPT 78466 is $154.94 for both facility and non-facility settings. This rate is based on 4.79 total RVUs multiplied by the 2025 conversion factor of 32.3465. Local Medicare Administrative Contractors (MACs) may have slightly different rates based on geographic adjustments.

How does CPT 78466 differ from other cardiac nuclear imaging codes?

CPT 78466 specifically describes infarct-avid imaging using radiopharmaceuticals that bind to necrotic myocardial tissue to visualize heart attacks. This differs from myocardial perfusion imaging (78451-78454) which assesses blood flow, and from MUGA scans (78472-78473) which measure cardiac function. The infarct imaging is typically performed 24-72 hours post-MI when diagnosis is unclear.

Can CPT 78466 be billed with modifier 26 for professional component only?

Yes, modifier 26 should be appended when billing only the professional component (physician interpretation and report) of the myocardial infarct imaging. This is common in hospital settings where the facility bills the technical component separately with modifier TC. The professional component represents approximately 20-30% of the total reimbursement.

What diagnosis codes support medical necessity for CPT 78466?

Primary diagnosis codes supporting CPT 78466 include acute myocardial infarction codes (I21.x series), subsequent MI codes (I22.x), and chest pain codes (R07.x) when MI is suspected. The documentation must demonstrate clinical uncertainty requiring definitive imaging beyond standard cardiac enzyme and ECG findings.

How many RVUs is CPT code 78466 worth in 2025?

CPT 78466 has a total of 4.79 RVUs in 2025, comprising 0.69 work RVUs, 4.04 practice expense RVUs, and 0.06 malpractice RVUs. The practice expense RVU is the same (4.04) for both facility and non-facility settings, which is unusual for imaging codes.

Do I need prior authorization for CPT 78466 with commercial insurance?

Most commercial payers and Medicare Advantage plans require prior authorization for CPT 78466 due to the availability of alternative diagnostic methods and the specialized nature of nuclear cardiology procedures. Always verify authorization requirements before performing the study to avoid claim denials.

Can CPT 78466 be billed on the same day as a myocardial perfusion scan?

Generally no, unless the services are performed in separate sessions with distinct clinical indications documented. Most payers apply Correct Coding Initiative (CCI) edits that bundle related cardiac imaging performed on the same day. Modifier 59 may be appropriate only when documentation clearly supports separate and medically necessary services.