CPT 93040Cardiology

Rhythm ecg with report

CPT 93040 covers a rhythm ECG (electrocardiogram) with a written interpretation report, which is a simple heart rhythm test that records the electrical activity of your heart over a short period to check for irregular heartbeats.

Showing rates for

National Average

Base Medicare rate

$12.94

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

0.15

PE RVU (NF)

0.23

MP RVU

0.02

Total RVU

0.4

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

NCCI bundling edits

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Billing tips

Do not bill 93040 on the same day as comprehensive ECG codes (93000-93010) without modifier 59 and clear documentation showing separate medical necessity
Impact: Prevents automatic denial and potential $12.94 revenue loss due to bundling edits
Ensure the written report explicitly states 'rhythm ECG' or 'rhythm strip' interpretation and focuses on rhythm analysis, not a full 12-lead interpretation
Impact: Distinguishes service from comprehensive ECG codes during audits; failure to differentiate can result in denial or downcoding
When billing multiple rhythm ECGs on the same day, append modifier 76 or 91 to second and subsequent services with documentation explaining clinical need for each separate reading
Impact: Captures additional $12.94 per repeat test when medically justified; without modifier, second service will be denied as duplicate
Bill 93040 separately from E/M services only when the rhythm ECG was not part of the decision-making for the encounter and represents a distinct diagnostic service
Impact: Adds $12.94 to encounter revenue when appropriately documented; improper billing may trigger medical necessity denials
Verify that rhythm ECG interpretation is signed and dated on the same date of service; delayed signatures can trigger timely filing or medical record audit issues
Impact: Prevents payment delays or denials; unsigned reports are frequently cited in audits as non-compliant documentation
Consider practice setting when billing: hospital-employed physicians may need to use place of service codes correctly to avoid facility/non-facility rate confusion

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Frequently asked questions

What is the difference between CPT 93040 and 93000?

CPT 93040 is a rhythm ECG using 1-3 leads focused solely on rhythm analysis, while CPT 93000 is a comprehensive 12-lead ECG with full interpretation. Code 93000 reimburses higher and provides complete cardiac electrical assessment, whereas 93040 is limited to rhythm evaluation only and reimburses at $12.94.

How much does Medicare pay for CPT 93040 in 2025?

Medicare pays $12.94 for CPT 93040 in 2025 (both facility and non-facility rates are identical). This is based on 0.4 total RVUs multiplied by the 2025 conversion factor of 32.3465.

Can I bill 93040 and 93000 on the same day?

Generally no, unless there is a distinct medical necessity for a separate rhythm ECG beyond the comprehensive 12-lead ECG. If both are medically necessary and documented as separate services for different clinical indications, append modifier 59 to 93040 with clear documentation explaining why both were required.

What RVU value is assigned to CPT code 93040?

CPT 93040 has a total RVU of 0.4, consisting of 0.15 work RVU, 0.23 practice expense RVU (both facility and non-facility), and 0.02 malpractice RVU for 2025.

Do I need a written report to bill 93040?

Yes, CPT 93040 explicitly requires a written interpretation report. The report must be signed and dated by the interpreting physician and include rhythm analysis, rate, and any abnormalities identified. Without a documented report, the service does not meet CPT code requirements.

When should I use modifier 26 with CPT 93040?

Use modifier 26 when you are billing only for the physician's professional interpretation and report, not the technical component (equipment and technician). This is common when the rhythm ECG was performed at a hospital or facility that bills separately for the technical component with modifier TC.

Can CPT 93040 be billed for Holter monitor interpretation?

No, CPT 93040 is for a single rhythm ECG tracing with interpretation, not extended ambulatory monitoring. Holter monitor services have separate CPT codes (93224-93227 for 24-hour monitoring, 93228-93229 for external mobile cardiovascular telemetry). Using 93040 for Holter interpretation would be incorrect coding.