CPT 93306 (complete transthoracic echocardiography with Doppler) carries 1.42 work RVU, 4.39 practice expense RVU, and 0.08 malpractice RVU under the 2026 Medicare Physician Fee Schedule (MPFS), for a total of 5.89 RVUs before geographic adjustment. That total RVU figure, not the work RVU alone, is what drives the Medicare payment calculation.
CPT 93306 RVU Components for 2026
| Component | 2026 Value | What It Represents |
|---|---|---|
| Work RVU | 1.42 | Physician time, skill, and cognitive effort to acquire, review, and interpret the complete echo study |
| Practice Expense (PE) RVU | 4.39 | Ultrasound equipment, sonographer labor, disposable supplies, and facility overhead |
| Malpractice (MP) RVU | 0.08 | Professional liability insurance cost allocated to this service |
| Total RVU | 5.89 | Sum of all three components before GPCI adjustment |
Notice that the PE component (4.39) is more than three times larger than the work component (1.42). That’s typical for imaging services: the equipment and technical labor cost more, relative to physician cognitive work, than a purely cognitive service like an office visit. This is why CPT 93306’s payment behaves differently across settings and why using the work RVU alone to estimate payment produces a badly understated number.
What Each RVU Component Actually Measures
A Relative Value Unit (RVU) is not a dollar figure. It’s a weighted score that CMS assigns to a CPT or HCPCS code to reflect the relative resources needed to furnish that service compared with other services on the Medicare Physician Fee Schedule. Three separate RVU components exist because CMS tracks three distinct types of resource consumption:
- Work RVU (wRVU) reflects physician time, technical skill, mental effort, and stress associated with the service. This is the component most often cited in physician productivity reports and RVU-based compensation plans.
- Practice expense RVU (PE RVU) reflects the cost of running the practice or facility where the service is furnished — staff, equipment, supplies, and space. PE RVU commonly differs between the non-facility setting (independent office, where the practice bears equipment and staff costs) and the facility setting (hospital or ASC, where the facility bears most of those costs). For CPT 93306, the non-facility and facility PE RVU are the same, since the equipment and sonographer cost structure doesn’t shift materially by site of service.
- Malpractice RVU (MP RVU) reflects the professional liability insurance cost allocated to the service based on its risk profile.
These three components are additive. Total RVU is not the same as work RVU, and total RVU is still not the same as a dollar payment amount — that conversion requires geographic adjustment and a conversion factor, covered below.
From RVU to Medicare Payment
Medicare doesn’t pay based on raw RVUs. Each component is first adjusted by a Geographic Practice Cost Index (GPCI) specific to the physician’s locality, then the adjusted total is multiplied by the conversion factor (CF) — a dollar-per-RVU figure set annually by CMS. The formula is:
Medicare Payment = ((Work RVU × Work GPCI) + (PE RVU × PE GPCI) + (MP RVU × MP GPCI)) × Conversion Factor
For CY 2026, CMS finalized two separate conversion factors for the first time: $33.5675 for clinicians who qualify as Advanced Alternative Payment Model (APM) participants (QPs), and $33.4009 for everyone else (non-QPs). Which one applies depends on the billing clinician’s QP status for that year, not on the CPT code itself — this is a detail that’s easy to miss and materially affects the payment estimate.
Using the national unadjusted GPCI values (which average to roughly 1.0 across components) and the 2026 non-QP conversion factor, CPT 93306 works out to approximately:
(1.42 × 1.0 + 4.39 × 1.0 + 0.08 × 1.0) × $33.4009 = 5.89 × $33.4009 ≈ $196.73
That $196.73 figure is a national average estimate, not a specific locality’s payment. Real localities have GPCI values above or below 1.0 depending on local labor and rent costs. For example, if a hypothetical high-cost locality carried illustrative GPCI values of 1.08 (work), 1.15 (PE), and 0.95 (MP) — these are example numbers only, not actual CMS locality data — the calculation would shift to:
(1.42 × 1.08 + 4.39 × 1.15 + 0.08 × 0.95) × $33.4009 ≈ (1.53 + 5.05 + 0.08) × $33.4009 ≈ $222.39
That roughly 13% difference between a national estimate and a high-cost locality estimate illustrates why PE RVU’s outsized weight in CPT 93306 makes locality selection meaningful. For an exact figure tied to a specific state or Medicare Administrative Contractor locality, running the code through a GPCI calculator alongside the RVU calculator produces a locality-specific result rather than a national approximation.
wRVU Compensation vs. Medicare Payment RVU — Two Different Uses of the Same Number
CPT 93306’s 1.42 work RVU shows up in two contexts that are frequently conflated, and mixing them produces bad financial assumptions.
| Context | What 1.42 wRVU Means | What It Does Not Mean |
|---|---|---|
| Medicare payment calculation | One input, combined with PE RVU, MP RVU, GPCI, and the conversion factor, to estimate the Medicare-allowed amount for the claim | It is not itself a dollar figure and cannot be multiplied by the CF alone to get a payment |
| Physician compensation model | An internal productivity credit the employer applies per unit of work, at a negotiated dollar-per-wRVU rate (e.g., $50–$90/wRVU depending on specialty and market) | It has no fixed relationship to what Medicare — or any commercial payer — actually reimburses for the claim |
A cardiology group might credit a physician $60 per wRVU for a completed and interpreted echo, producing $85.20 in internal compensation credit for that 1.42 wRVU (1.42 × $60). That $85.20 has no fixed relationship to the $196.73 Medicare payment estimate above — one is an internal compensation formula set by contract, the other is a claim-level Medicare reimbursement estimate involving PE and MP components plus geographic adjustment. Commercial payer contracts add a third variable entirely, since most commercial payers don’t publish RVU-based fee schedules the way Medicare does, and many negotiate rates as a percentage of the Medicare fee schedule rather than adopting it directly.
Whether the 1.42 wRVU is even creditable to a given physician also depends on the employment agreement: whether it credits professional-only interpretation, global service, technical component, or supervision, and whether hospital-based interpretations are counted the same as outpatient ones. Two cardiologists both reading a 93306 study can have very different compensation outcomes if their contracts define “credited service” differently — a review question that belongs in contract analysis, not in the RVU table itself.
CPT 93306 Compared With Adjacent Cardiology and E/M Codes
Comparing RVU inputs across services — before locality adjustment — helps frame how imaging work stacks against stress testing and office visits in a productivity or contract model. The figures below reflect 2026 non-facility values.
| CPT | Service | Work RVU | PE RVU (Non-Facility) | MP RVU | Total RVU (Non-Facility) |
|---|---|---|---|---|---|
| 93306 | Complete TTE with Doppler | 1.42 | 4.39 | 0.08 | 5.89 |
| 93015 | Cardiovascular stress test, global (supervision, tracing, interpretation) | 0.75 | 1.36 | 0.09 | 2.20 |
| 99214 | Established patient office visit, level 4 | 1.92 | 2.00 | 0.14 | 4.06 |
A few things stand out in this comparison. First, 93306’s work RVU (1.42) is lower than a level-4 office visit (1.92), even though the echo generally takes comparable or greater physician time in many practice settings — this is a known point of discussion in cardiology compensation planning, since work RVU reflects CMS’s valuation methodology, not simply time spent. Second, 93306’s PE RVU (4.39) dwarfs both comparison codes, driven by ultrasound equipment and sonographer cost. Third, CPT 93015 is billed as a global code in this comparison (supervision, tracing, and interpretation combined); if a physician only bills the professional interpretation component, the work RVU and total RVU are proportionally lower — an important distinction to check against the specific claim modifier used. For a deeper breakdown of 93015 by component, the CPT 93015 RVU guide covers professional-only versus global billing separately.
Applying 93306 to a Cardiology Productivity or Contract Review
Before treating 93306’s RVU data as evidence for or against a compensation target, confirm three things against the actual written agreement: which services are credited (global, professional-only, technical, or supervision), whether the RVU schedule year referenced in the contract matches the 2026 data being used, and whether imaging access in the physician’s actual role supports the assumed echo volume. A cardiologist in an imaging-heavy hospital-employed role and a cardiologist in a clinic-heavy outpatient role with limited echo lab access will have very different realistic annual wRVU totals from this single code, even under identical contract terms.
A simplified compensation projection might look like:
Estimated annual echo compensation = (Number of 93306 studies interpreted annually) × 1.42 wRVU × Negotiated $/wRVU rate
If a physician interprets 400 complete echo studies annually under a global-crediting agreement paying $65/wRVU, that’s 400 × 1.42 × $65 ≈ $36,920 in annual compensation credit from this one code — separate entirely from what Medicare, or any other payer, actually reimburses the practice for those same 400 claims. Running the full specialty mix (echo, stress testing, ECG, E/M, hospital consults) through cardiology wRVU benchmarks gives better context for whether an annual target built partly around echo volume is realistic for a given role.
Where This RVU Data Fits in a Broader Workflow
The 93306 RVU figures above are useful once complete transthoracic echo with Doppler is already the confirmed and documented CPT code — this data doesn’t help decide between complete versus limited echo, whether a Doppler add-on applies, or whether only the professional component should be billed. Once the code is confirmed, the RVU calculator converts these component values into a payment estimate for a specific locality, the GPCI calculator isolates how much of that estimate comes from geographic adjustment alone, and the CPT 93015 RVU guide provides the equivalent breakdown for stress testing when building a full cardiology service comparison.