A clinician who finishes the MIPS 2026 performance year below the CMS performance threshold takes a Medicare Part B pay cut in 2028 — up to 9% off every professional claim, for an entire calendar year. For a practice billing $1.2 million a year in Part B allowed charges, that's over $100,000 walking out the door for a scoring problem that was fixable in July.
The performance period runs the full calendar year, but most practices don't look at their MIPS data until January of the following year — by which point half the categories are locked in and there's nothing left to fix. If you're checking your MIPS 2026 status in the back half of the year, you still have time to close gaps in Improvement Activities, catch a missing measure in Promoting Interoperability, or confirm your Quality measures are pulling clean data from your EHR.
The Merit-based Incentive Payment System (MIPS) scores eligible clinicians on a 0-100 point scale across four performance categories, and that score determines whether your Medicare Part B payments go up, stay flat, or go down two years later. The 2026 performance year sets your 2028 payment adjustment — the two-year lag is exactly why practices lose track of the stakes until the penalty letter arrives.
CMS weights each category differently, and the weighting has stayed fairly consistent since the 2022 performance year: Quality and Cost each carry 30%, Promoting Interoperability carries 25%, and Improvement Activities carries 15%. Small practices, non-patient-facing clinicians, and certain hospital-based groups get reweighting exceptions — if Promoting Interoperability doesn't apply to you, that 25% typically shifts to Quality.
| Category | 2026 Weight | What It Measures |
|---|---|---|
| Quality | 30% | Up to 6 measures reported via registry, EHR, or claims — outcomes, process, patient experience |
| Cost | 30% | Calculated by CMS from claims data — no separate reporting required |
| Promoting Interoperability | 25% | Certified EHR use — e-prescribing, health information exchange, security risk analysis |
| Improvement Activities | 15% | Attest to activities like care coordination, patient safety, population management |
Cost is the category most practices forget about because there's nothing to submit — CMS calculates it entirely from the claims you've already billed. That means denied claims, unbundled visits, and inconsistent coding don't just cost you on the revenue side. They quietly drag your Cost score down too, since incomplete or inconsistent claims data skews the episode-based cost measures CMS attributes to you.
CMS sets a performance threshold each year — the minimum composite score needed to avoid a negative adjustment. Since the 2023 performance year, that threshold has sat in the 75-89 point range, and CMS has generally favored holding it steady rather than raising it sharply year over year. Confirm your exact 2026 threshold through your QPP eligibility and scoring lookup, since the finalized number matters more than the historical range once you're deciding how much reporting effort to put in for the rest of the year.
Score below the threshold and the penalty scales with the gap — the further under you land, the closer you get to the full 9% cut. Score above it and you're eligible for a positive adjustment, though because MIPS is budget-neutral, the upside pool is funded by penalties collected from low scorers, which keeps the actual bonus percentages modest most years — often well under 2%, even for top performers.
A 9% negative adjustment doesn't arrive as one invoice. It's applied line by line to every Medicare Part B professional claim you bill throughout 2028. For a solo practitioner billing $400,000 a year in Part B charges, that's roughly $36,000 shaved off gradually across twelve months of remits — easy to miss on any single EOB, brutal in aggregate.
Not every Medicare clinician has to report MIPS. CMS excludes clinicians who fall under any one of three low-volume threshold criteria during the determination periods: $90,000 or less in allowed Medicare Part B charges, 200 or fewer Part B beneficiaries treated, or 200 or fewer covered professional services furnished. Clinicians can also opt in voluntarily even if they qualify for exclusion, which makes sense for a growing practice that wants to build a positive-adjustment track record before it becomes mandatory.
First-year Medicare enrollees are excluded automatically. Clinicians participating in an Advanced Alternative Payment Model (APM) that meets qualifying participant thresholds are also excluded from standard MIPS scoring — they're scored under APM-specific rules instead, which is a separate conversation worth having with your billing team if your practice is part of an ACO or bundled-payment arrangement.
MIPS Value Pathways (MVPs) bundle a smaller, specialty-specific set of quality measures, improvement activities, and cost measures into a single reporting option, instead of the traditional pick-six-measures-from-a-long-list approach. CMS has been expanding the MVP library every year and has been vocal about wanting to eventually retire traditional MIPS in favor of MVPs and APMs. For the 2026 performance year, MVPs remain optional — but if your specialty has a mature MVP available, it's worth a real evaluation rather than defaulting to traditional MIPS out of habit.
The appeal is fewer, more relevant measures — a cardiology group reporting under a cardiology-specific MVP isn't wading through generic primary care quality measures that don't reflect their actual patient population. The tradeoff is less flexibility once you're locked into a pathway for the year. Talk to your billing and quality reporting team before switching mid-cycle.
CMS runs targeted and random data validation reviews on MIPS submissions, checking that reported quality measures and improvement activities are backed by actual documentation in the medical record — not just checked boxes in a registry portal. Practices selected for review typically get a records request with a short turnaround window, and a failed validation can retroactively reduce your score, which then reopens the payment adjustment calculation.
The most common failure point isn't fraud — it's a gap between what the EHR reports automatically and what's actually documented. An Improvement Activity attestation with no supporting note in the chart, or a Quality measure numerator that doesn't match the clinical documentation, is the kind of thing that surfaces in a validation review months after you've already banked the assumption that your score was solid. Keep a running folder of supporting documentation for every measure and activity you report, updated as you go rather than reconstructed after a request lands.
The billing gaps most practices don't catch until they show up as denials. Get the checklist — free, no spam.
✓ On its way! Check your inbox — we'll send it within the hour.
We don't share your info. Unsubscribe any time.
We'll pull your claims data and flag the coding and documentation gaps that are quietly dragging your Quality and Cost scores down — before they cost you in 2028.
Get Your Free Revenue AssessmentFor more on how documentation gaps drive both denials and quality scoring problems, see our guides on medical necessity documentation and running an internal coding audit. If prior auth denials are also eating into your Cost category, our 2026 prior authorization guide covers the tracking workflow that keeps those claims clean.