Multiple procedure payment reduction (MPPR)

When a provider—or two providers within the same group practice—furnishes more than one qualifying procedure to the same patient on the same day, Medicare does not pay full price for every service. Instead, it ranks procedures by value, pays 100% for the top-ranked code, and applies a percentage reduction to subsequent codes. For the technical component (TC) of diagnostic imaging such as MRI or CT, that reduction is 50% of the fee schedule amount for each secondary procedure. For the professional component (PC) of imaging, the reduction is 5% (i.e., payment at 95%) for each subsequent procedure as of January 1, 2017—down from 25% under the prior rule. For outpatient therapy services designated as "always therapy" codes, the practice expense (PE) relative value unit is cut by 50% for every second and subsequent procedure or unit billed on that date.

The policy rests on the straightforward economic premise that delivering two related imaging studies or therapy services on the same visit involves shared overhead—the patient is already present, equipment is already running, staff are already engaged—so the full PE cost attributed to a standalone service does not recur in full. Congress first authorized imaging MPPRs through the Balanced Budget Act of 2005; CMS implemented the TC reduction in the 2006 Physician Fee Schedule Final Rule and later expanded the policy to the PC. The Consolidated Appropriations Act of 2016 then softened the PC reduction from 25% to 5%, recognizing that interpretation work does not diminish proportionally the way equipment costs do.

In orthopedics, the procedures most frequently touched by MPPR are multisequence or multi-region MRI studies (e.g., bilateral knees or combined hip-and-pelvis imaging ordered the same day), CT scans of adjacent body segments, and outpatient physical or occupational therapy visits in which several timed CPT codes are billed in a single session. Work RVUs (wRVUs) are not reduced under MPPR—only the practice expense component is affected. That distinction matters for physician compensation models that track wRVUs separately from collections.

Failing to account for MPPR when projecting revenue for high-volume imaging days or post-surgical therapy episodes leads to systematic over-forecasting of collections. More critically, if a practice's billing system does not apply MPPR reductions before submitting claims, Medicare will apply them on adjudication anyway—and any resulting overpayments must be refunded. CMS and Medicare Advantage auditors treat MPPR as a bright-line rule; a pattern of claims that ignore it can trigger a comparative-billing report or a pre-payment review. On the clinical side, understanding MPPR helps orthopedic surgeons make smarter same-day ordering decisions: bundling two MRI studies into one visit is often efficient for the patient but will generate less imaging revenue than the sum of two standalone orders—a real factor in service-line financial modeling.