CPT 45380 (colonoscopy with biopsy, single or multiple) carries a work RVU of approximately 3.47 under the CY 2026 Medicare Physician Fee Schedule (MPFS), down from prior years because CMS applied a new “efficiency adjustment” that cut intraservice work RVUs by 2.5% for non-time-based procedures, including most endoscopic codes. That single number, however, tells you almost nothing about what the code actually pays or how it should be treated in a compensation plan — you need the full RVU structure, the applicable conversion factor, and geographic adjustment to get there.
What the RVU Actually Measures
A Relative Value Unit is not a dollar amount. It’s a relative weighting system CMS uses to compare the resources involved in furnishing one CPT/HCPCS service against another. Every code has three RVU components, and each one is adjusted differently before payment is calculated.
| Component | What It Reflects | Adjusted By |
|---|---|---|
| Work RVU (wRVU) | Physician time, skill, mental effort, and stress in performing the service | Work GPCI |
| Practice Expense RVU (PE RVU) | Clinical staff, equipment, supplies, and overhead — differs by site of service | PE GPCI |
| Malpractice RVU (MP RVU) | Professional liability insurance cost allocated to the service | MP GPCI |
For CPT 45380, CMS separates practice expense into two values depending on where the procedure is performed. The non-facility PE RVU applies when the physician’s own practice bears the full cost of space, staff, and endoscopy equipment (for example, an office-based endoscopy suite). The facility PE RVU is lower because it assumes the hospital or ambulatory surgery center is absorbing most of the overhead — the physician is only billing for professional work in that setting.
CPT 45380 RVU Snapshot (CY 2026)
Based on the CY 2026 MPFS data cycle, aggregated third-party RVU trackers report the following approximate national values for CPT 45380 before geographic adjustment:
| Metric | Value (2026, national, pre-GPCI) |
|---|---|
| Work RVU | ~3.47 |
| Total non-facility RVU | ~14.37 |
| Estimated non-facility Medicare payment | ~$479.97 |
These figures reflect the -2.5% efficiency adjustment CMS finalized for CY 2026 on non-time-based services like colonoscopy, and they use the non-qualifying-participant (non-QP) conversion factor of $33.4009. If you’ve seen a work RVU closer to 3.36 for this code elsewhere, verify which data year or dataset was used; QP status changes the conversion factor, not the work RVU. RVU data updates annually, and CY 2025 and CY 2026 values are not interchangeable. Always check the CPT page and confirm the fee schedule year before using a value in a payment or productivity model.
Why 2026 Changed the Math for Endoscopy Codes
CMS finalized two structural changes in the CY 2026 MPFS final rule that directly affect colonoscopy RVU values and should be factored into any 2026 estimate:
- A new efficiency adjustment cuts the intraservice time (and corresponding work RVU) by 2.5% for existing, non-time-based services — a category that includes most endoscopic procedures, drawing criticism from gastroenterology societies over the assumption that these procedures have gotten proportionally faster.
- For the first time, CMS is using two separate conversion factors: $33.57 for clinicians who are qualifying participants (QPs) in an Advanced Alternative Payment Model, and $33.4009 for everyone else.
This matters because two physicians performing the identical CPT 45380 procedure could see different Medicare-allowed amounts purely based on their APM participation status — not because the underlying RVU components changed. Any 2026 payment estimate for this code needs to specify which conversion factor applies.
From RVU to Medicare Payment
Work RVU alone does not equal reimbursement. Medicare payment for CPT 45380 combines all three RVU components, each adjusted by its own Geographic Practice Cost Index (GPCI) value for the physician’s locality, then multiplied by the applicable conversion factor:
Medicare Payment = [(Work RVU × Work GPCI) + (Selected PE RVU × PE GPCI) + (MP RVU × MP GPCI)] × Conversion Factor
Illustrative example (using rounded, non-official figures purely to demonstrate the mechanics — not current CMS data):
Assume a locality where Work GPCI = 1.05, PE GPCI = 1.02, and MP GPCI = 0.95, and a physician bills CPT 45380 in a facility setting.
- Work component: 3.47 × 1.05 = 3.6435
- Facility PE component (example value 1.43) × 1.02 = 1.4586
- Malpractice component (example value 0.42) × 0.95 = 0.3990
- Total GPCI-adjusted RVU: 3.6435 + 1.4586 + 0.3990 = 5.5011
- Payment at non-QP CF ($33.4009): 5.5011 × 33.4009 ≈ $183.74
Compare that to a non-facility setting, where practice expense RVU is materially higher because the physician’s practice is covering the endoscopy suite and staffing costs directly — the national non-facility estimate runs closer to $407 before GPCI. The gap between facility and non-facility payment is one of the most common sources of confusion when people pull a single RVU number without specifying setting.
Run this scenario for an actual locality using the RVU calculator or the GPCI calculator rather than applying the example multipliers above — GPCI values vary meaningfully by Medicare locality, and rounding a national estimate over a specific market can misstate revenue by a wide margin for high-volume procedures like colonoscopy.
CPT 45380 vs. 45385: Why Higher RVU Doesn’t Mean “Better Code”
CPT 45380 (biopsy) and CPT 45385 (colonoscopy with removal of lesion by snare technique) are distinct procedures with different documentation requirements — they are not two payment tiers of the same service. Based on aggregated CY 2026 RVU data:
| CPT | Procedure | Work RVU (2026) | Non-Facility Total RVU | Est. Non-Facility Payment |
|---|---|---|---|---|
| 45380 | Colonoscopy with biopsy | ~3.47 | ~14.37 | ~$479.97 |
| 45385 | Colonoscopy with lesion removal by snare | ~4.46 | ~14.97 | ~$500 |
The RVU spread between these two codes exists because snare removal involves more physician work and different supply costs than biopsy forceps sampling — not because one code is a “better” or “higher-paying” version of the other. CPT rules, operative documentation, and what the physician actually did during the procedure determine which code applies; the RVU value is only relevant after that determination is made. A related upper endoscopy code, CPT 43239 (EGD with biopsy), follows the same logic but sits on a completely different RVU scale because it’s an upper GI, not lower GI, procedure — see the dedicated CPT 43239 RVU guide for its current-year values rather than assuming a proportional relationship to colonoscopy codes.
wRVU Compensation Is Not the Same Question as Medicare Payment
This is where the two most common misreadings of RVU data collide. Medicare payment for CPT 45380 uses total RVU (work + practice expense + malpractice, GPCI-adjusted, times the conversion factor) to determine what CMS pays for the claim. Physician compensation plans, by contrast, typically use work RVU only, multiplied by a negotiated dollar-per-wRVU rate that has nothing to do with the Medicare conversion factor.
| Medicare Payment | wRVU-Based Compensation | |
|---|---|---|
| RVU component used | Work + PE + MP (total RVU) | Work RVU only |
| Rate applied | CMS conversion factor ($33.4009 or $33.57 for 2026) | Practice- or employer-negotiated $/wRVU rate |
| Adjusted for locality? | Yes, via GPCI | Sometimes, depending on contract terms |
| Who sets the rate | CMS, via annual rulemaking | Employer or group, via compensation agreement |
If a GI group pays $55 per wRVU and a physician bills 400 units of CPT 45380 in a year, the compensation-side calculation is straightforward: 400 × 3.47 wRVU × $55 = $76,340 in wRVU-based compensation. That figure is entirely separate from what Medicare actually reimburses the practice for those same 400 claims, which depends on total RVU, GPCI, payer mix, and how many of those cases were billed to Medicare versus a commercial payer at a different contracted rate. Treating the two numbers as interchangeable — assuming higher Medicare reimbursement automatically means higher physician pay, or vice versa — is one of the most frequent errors in productivity discussions.
It’s also worth noting that Medicare’s payment rules apply specifically to Medicare claims. Commercial payers frequently use MPFS RVU data as a reference point in their fee schedules, but they are not obligated to use CMS’s conversion factor, GPCI values, or even the current-year RVU set — a commercial contract might still be anchored to an older MPFS vintage. Any reimbursement estimate built from RVU data should specify whether it represents Medicare’s allowed amount or a payer-specific rate.
Reviewing GI Productivity Beyond a Single Procedure Code
For gastroenterology compensation review, CPT 45380 only contributes wRVU credit if the physician’s written compensation agreement recognizes the service under the RVU schedule year and crediting rules the practice actually applies — some plans exclude certain modifiers or cap credit for repeat procedures in a single session. Colonoscopy volume can be a large share of annual production for a GI physician, but a complete productivity review also needs to account for:
- Clinic E/M visits, consults, EGD, and ERCP volume alongside colonoscopy.
- Call coverage obligations and how (or whether) they’re credited.
- Endoscopy block access and referral volume, which cap how many procedures a physician can physically perform regardless of demand.
- Payer mix, since Medicare-rate estimates don’t reflect commercial or Medicaid reimbursement for the same code.
A colonoscopy RVU value supports compensation modeling, but it can’t independently confirm whether an annual wRVU target is realistic — that depends on the practice environment and the specific crediting language in the contract. Reviewing a compensation target against a benchmark, such as the gastroenterology wRVU benchmarks reference, or checking a contract for threshold and guarantee structure with the contract red flags guide, fills in the parts a single CPT-level RVU number can’t answer on its own.
Building the Full Estimate
To take CPT 45380 from a reference value to a usable number, the sequence generally runs: confirm the current-year work, PE, and MP RVU values for the code; select facility or non-facility setting; apply the correct locality’s GPCI values to each component separately; and multiply by the conversion factor that matches the physician’s APM participation status. The RVU calculator handles the component math directly, and the GPCI calculator isolates the geographic adjustment step for locality comparisons. Because CY 2026 introduced both the efficiency adjustment and the split conversion factor, re-running any estimate built on CY 2025 or earlier data is worth doing before using it in a revenue projection or compensation conversation.