MIPS Performance Categories: Quality, Cost, PI, IA

MIPS, the Merit-Based Incentive Payment System, scores Medicare Part B clinicians across four performance categories: Quality (30%), Cost (30%), Promoting Interoperability (25%), and Improvement Activities (15%) for the 2026 performance year. 

CMS combines the four weighted scores into a MIPS final score on a 0 to 100 scale. The final score is compared to the 75-point performance threshold. This is done to set each clinician’s payment adjustment, up to plus or minus 9 percent of Medicare Part B allowed charges, applied two years later.

Read the article below to understand all of the performance categories in detail. After going through this guide, you will have a firm grip on the weightage of each performance category, reweighting redistribution, and other related concepts. 

What are MIPS Performance Categories?

MIPS Performance Categories are the four scoring areas CMS uses to evaluate clinician performance under the Quality Payment Program. Each category is scored on an internal 100-point scale, weighted, and summed to produce the MIPS final score. MIPS scores clinicians across four performance categories, including Quality, Cost, Promoting Interoperability, and Improvement Activities.

The 2026 standard weights are Quality 30 percent, Cost 30 percent, Promoting Interoperability 25 percent, and Improvement Activities 15 percent, per the November 5, 2025 Physician Fee Schedule Final Rule. The four category scores combine into a MIPS final score on a 0 to 100 point scale. 

The following table shows the 2026 standard weights, what each category measures, and which party is responsible for submitting the data.

Category	2026 Weight	What It Measures	Who Submits
Quality	30%	Clinical care delivery via 6 clinician-selected measures from a 187-measure inventory	Clinician
Cost	30%	Resource use measured via Medicare Part B claims data	CMS calculates, no clinician submission
Promoting Interoperability (PI)	25%	Electronic health information exchange using CEHRT	Clinician
Improvement Activities (IA)	15%	Practice-improvement work across approximately 100 activities	Clinician

Quality and Cost each carry equal weight at 30 percent, making them the two largest scoring components. The following sections cover each MIPS Performance Category in the order CMS lists the categories in the title. 

What is the MIPS Quality Category?

The MIPS Quality category measures clinical care delivery and accounts for 30 percent of the 2026 MIPS final score. CMS finalized 187 MIPS Quality measures for the 2026 performance year, including 5 new measures, 10 retired measures, and 30 substantively modified measures.

Clinicians select 6 measures from the 187-measure inventory, with at least 1 outcome or high-priority measure required. Quality measures require 75 percent data completeness for the 2026 performance year. CMS scores each submitted measure against a decile benchmark derived from prior-year national performance data.

Key Quality category requirements for the 2026 performance year:

• Measure Selection: 6 measures from 187 total, including at least 1 outcome or high-priority measure per CMS guidelines.
• Data Completeness: 75 percent of submitted cases must meet the completeness criterion or the measure receives a score of zero.
• Benchmarking: CMS scores each measure against a decile performance band using prior-year national performance data as the reference population.
• Topped-out Measures: CMS caps the scoring contribution for measures where national performance consistently exceeds the top decile, limiting maximum point accrual.

Weighted at 30 percent, the Quality category is one of the two highest-weighted MIPS Performance Categories alongside Cost. 

What is the MIPS Cost Category?

The MIPS Cost category measures resource use and accounts for 30 percent of the 2026 MIPS final score. The Cost category includes 35 measures for 2026: Total Per Capita Cost (TPCC), Medicare Spending Per Beneficiary (MSPB), and 32 episode-based cost measures.

CMS calculates Cost performance directly from Medicare Part B claims. Clinicians do not submit Cost data. New cost measures enter a two-year informational-only feedback period before counting in the MIPS final score, allowing practices to review attribution data before the measure affects payment.

Cost category key facts for 2026:

• Total measures: 35 total, structured as TPCC, MSPB, and 32 episode-based cost measures.
• Submission requirement: None. CMS calculates the Cost category entirely from Medicare Part B claims.
• New-measure transition: A two-year informational-only feedback period applies to newly adopted cost measures.
• Attribution review: Practices benefit from auditing their claims attribution to understand which Cost measures apply before payment calculations are finalized.

What is the MIPS Promoting Interoperability (PI) Category?

The MIPS Promoting Interoperability (PI) category measures electronic health information exchange and accounts for 25 percent of the 2026 MIPS final score. PI replaced the Medicare EHR Incentive Program (Meaningful Use) in 2017 under the Quality Payment Program framework.

The PI category requires Certified Electronic Health Record Technology (CEHRT), specifically the 2015 Edition Cures Update, for the 2026 performance year. Clinicians must use CEHRT for a continuous 180-day minimum reporting period during the performance year.

Key 2026 updates to the PI category include:

• Security Risk Analysis (SRA): The SRA now requires two yes-attestations under the HIPAA Security Rule starting in PY 2026, replacing the prior single-attestation standard.
• 2025 SAFER Guides: CMS adopted the 2025 SAFER Guides as the current self-assessment framework for PI reporting readiness.
• TEFCA Bonus Measure: A new optional Public Health Reporting bonus measure under the Trusted Exchange Framework and Common Agreement (TEFCA) is available for clinicians participating in a national interoperability network.

What is the MIPS Improvement Activities (IA) Category?

The MIPS Improvement Activities (IA) category measures practice-improvement work and accounts for 15 percent of the 2026 MIPS final score. The IA inventory includes approximately 100 activities organized across CMS-defined subcategories.

Clinicians attest to 2 activities (or 1 activity with a qualifying special status) for a minimum of 90 continuous days during the performance year. Each activity carries a defined weight toward the 40-point IA maximum score.

IA activity weights and requirements for 2026:

• High-weighted Activities: Each high-weighted IA is worth 20 points toward the 40-point maximum.
• Medium-weighted Activities: Each medium-weighted IA is worth 10 points toward the 40-point maximum.
• Minimum Duration: 90 continuous days of activity performance per attestation period.
• 2026 Subcategory Change: The Advancing Health and Wellness (AHW) subcategory replaces the Achieving Health Equity (AHE) subcategory, per the November 5, 2025 Final Rule. Three new activities were added and 8 were removed.

How does MIPS Reweighting Redistribute Category Weights?

Reweighting is the process by which CMS redistributes the weight of a MIPS Performance Category reduced to 0 percent across the remaining three scored categories. Three conditions trigger reweighting: 

• A qualifying special status
• An approved hardship exception
• An inability to score a category due to insufficient data.

When Promoting Interoperability is reweighted to 0 percent, the redistribution path differs for large practices and small practices (15 eligible clinicians or fewer). For large practices, the 25 percent PI weight redistributes equally between Quality and Cost. For small practices, the PI weight flows to Quality and IA rather than to Cost.

The following table shows the standard 2026 weights alongside four reweighting scenarios for large practices and small practices.

Scenario	Quality	Cost	PI	IA
Standard (all categories scored)	30%	30%	25%	15%
PI = 0% (large practice)	42.5%	42.5%	0%	15%
PI = 0% (small practice with ≤15 clinicians)	40%	30%	0%	30%
Quality = 0% (approved exception)	0%	37.5%	37.5%	25%
IA = 0% (approved exception)	34.3%	34.3%	31.4%	0%

Small practices with no PI submission are auto-reweighted to Quality 40 percent and IA 30 percent under the traditional MIPS 2026 structure. 

What is Automatic vs. Manual Reweighting?

Automatic reweighting means CMS applies the category weight redistribution without any clinician action, triggered by a qualifying special status. Manual reweighting means a clinician submits an approved Hardship Exception or Extreme and Uncontrollable Circumstances (EUC) application to request redistribution.

Clinicians who receive automatic reweighting for Promoting Interoperability can still override the automatic status by voluntarily submitting PI data during the performance year. Voluntary PI submission restores the standard 25 percent PI weight and removes the automatic reweighting from the final score calculation.

Which Special Statuses Trigger Automatic Reweighting of PI?

Four special statuses trigger automatic reweighting of Promoting Interoperability to 0 percent. CMS applies the redistribution without any clinician action when a qualifying status is confirmed for the performance year.

Special Status	Qualifying Threshold	PI Redistribution (Large Practice)	PI Redistribution (Small Practice with ≤15)
ASC-based Clinician (POS code 24)	≥75% of Medicare services billed with POS 24	25% split: Quality +12.5%, Cost +12.5%	25% split: Quality +10%, IA +15%
Hospital-based Clinician	≥75% of Medicare services in hospital settings (POS 21, 22, or 23)	25% split: Quality +12.5%, Cost +12.5%	25% split: Quality +10%, IA +15%
Non-patient-facing Clinician	≤100 patient-facing encounters in the prior performance year	25% split: Quality +12.5%, Cost +12.5%	25% split: Quality +10%, IA +15%
Small Practice	≤15 eligible clinicians in the group	25% split: Quality +12.5%, Cost +12.5%	25% split: Quality +10%, IA +15%

Clinicians who qualify under any of the four automatic reweighting statuses may still submit Promoting Interoperability data voluntarily. Voluntary PI submission overrides automatic reweighting and restores the standard 25 percent PI weight in the MIPS final score calculation. 

How Do the Four MIPS Category Scores Combine into the MIPS Final Score?

The four MIPS Performance Category scores combine into the MIPS final score using the following formula: 

(Quality Score × 0.30) + (Cost Score × 0.30) + (Pi Score × 0.25) + (Ia Score × 0.15) + Applicable Bonus Points. 

The MIPS performance threshold is 75 points for performance year 2026, held through 2028.

A worked example shows the calculation for a clinician scoring 80 percent on Quality, 70 percent on Cost, 88 percent on PI, and 100 percent on IA:

• Quality: 80 × 0.30 = 24.0 points
• Cost: 70 × 0.30 = 21.0 points
• Promoting Interoperability: 88 × 0.25 = 22.0 points
• Improvement Activities: 100 × 0.15 = 15.0 points
• Base MIPS final score: 82.0 points

A base score of 82.0 exceeds the 75-point threshold, placing the clinician above the performance threshold and qualifying for a positive payment adjustment. MIPS adjusts Medicare Part B payments by up to plus or minus 9 percent based on final score position relative to the threshold and the performance benchmark.

A final score below 75 points triggers up to a negative 9 percent Medicare Part B adjustment. The complex-patient bonus and other applicable bonuses are added to the base calculation after the four weighted category scores are summed. PY 2026 performance results affect 2028 Medicare Part B payments.

What Changed in the Four MIPS Performance Categories for 2026?

CMS finalized four-category updates for 2026 in the November 5, 2025 Physician Fee Schedule Final Rule. Each MIPS Performance Category received distinct changes to its measure inventory, reporting rules, or subcategory structure.

Category	What Changed for 2026	What Did Not Change
Quality	5 new measures added; 10 retired; 30 substantively modified — 187 total measures	6-measure selection rule; 75% data completeness requirement; decile benchmarking structure
Cost	No new measures added; 35 measures retained from 2025	TPCC, MSPB, and episode-based structure; no-submission rule; two-year informational-only period
Promoting Interoperability (PI)	SRA now requires two yes-attestations; 2025 SAFER Guides adopted; TEFCA bonus measure added	180-day continuous reporting period; 2015 Edition Cures Update CEHRT requirement
Improvement Activities (IA)	3 new activities added; 8 activities removed; AHW subcategory replaces AHE subcategory	90-day continuous attestation period; high-weighted (20 pts) and medium-weighted (10 pts) structure

The 2026 Final Rule also added 6 new specialty types to MIPS Value Pathways (MVPs), bringing the total MVP count to 27 active pathways for the performance year.

Which of The Four MIPS Categories Changed Most for 2026?

Promoting Interoperability changed most for 2026. The SRA two-attestation requirement is the largest single-rule shift across all four MIPS Performance Categories, as the change replaces a long-standing single-attestation standard with a dual-attestation requirement under the HIPAA Security Rule.

Improvement Activities ranks second in change depth, with the Advancing Health and Wellness (AHW) subcategory replacing Achieving Health Equity (AHE) and 8 activities removed from the inventory. Quality and Cost received measure-inventory updates but no rule-level changes to selection methodology or submission requirements. Rule changes carry greater scoring impact than inventory updates alone.

Which MIPS Performance Category Should a Practice Prioritize First?

Category prioritization depends on four factors specific to each practice. The fastest path to the 75-point performance threshold varies based on special status, CEHRT readiness, existing Quality data maturity, and available time in the performance year.

• Check special status first. ASC-based, hospital-based, non-patient-facing, and small practices receive automatic PI reweighting to 0 percent. Practices with PI auto-reweighted skip PI preparation entirely and reallocate that effort to Quality, Cost attribution, and IA.
• Lock PI early if CEHRT is installed. PI accounts for 25 percent of the MIPS final score. A practice with a functioning 2015 Edition Cures Update CEHRT system that secures a strong PI score early builds a large portion of the threshold in one category.
• Prioritize Quality when the measured inventory is mature. Six measures averaging the 7th or 8th decile yield 21 to 24 points of the 30-point Quality weight. Quality performance compounds across performance years as benchmark positions improve.
• Use IA for the fastest single-quarter lift. One or two activity attestations covering 90 continuous days earns the full 15-point IA contribution. IA is the quickest incremental path to the threshold for practices starting below 75 points.

Cost is CMS-calculated from Medicare Part B claims. The Cost category requires attribution review rather than direct submission, so practices focus on confirming which episode-based measures apply to their patient population. 

MIPS Value Pathways offer specialty-specific measure bundles covering all four MIPS Performance Categories for practices in one of the 27 available MVPs. 

How Does Quality Compare to IA for Fast Threshold Attainment?

IA wins on speed: 1 to 2 attestations covering 90 continuous days earns the full 15-point IA contribution toward the performance threshold. Quality wins on ceiling: 6 measures averaging the 7th or 8th decile yield 21 to 24 points of the 30-point Quality weight over a full performance year.

Category Lever	Time to Full Points	Maximum Contribution to Final Score
Improvement Activities (IA)	90 continuous days	15 points
Quality	Full 12-month performance year	30 points

For practices scoring below the 75-point threshold, an IA-first combined with Quality-second sequence is the fastest dual-lever path to threshold attainment. The two categories together contribute up to 45 points of the 75-point minimum target.

How Does Macralytics Support Practices Across All Four MIPS Performance Categories?

Macralytics conducts category-by-category audits for each of the four MIPS Performance Categories as part of the MIPS Reporting Services workflow. The Macralytics process covers Quality measure selection from the 187-measure inventory, PI attestation management for the two-attestation SRA requirement, Cost attribution review, and IA activity identification to reach the 75-point threshold.

Practices that work with Macralytics receive a structured review of each MIPS Performance Category before the performance year begins. The review covers applicable special statuses, CEHRT readiness for PI, measure-selection logic for the Quality category, and eligible activities for IA. 

What are the Most Common MIPS Performance Category Questions?

Five questions surface consistently when clinicians review the four MIPS Performance Categories. Here we will answer them to clear doubts related to MIPS performance categories. 

Are the four MIPS performance categories weighted equally?

No, the four MIPS Performance Categories carry different weights for 2026: Quality at 30 percent, Cost at 30 percent, Promoting Interoperability at 25 percent, and Improvement Activities at 15 percent. Weights shift through reweighting when a category is reduced to 0 percent and the weight redistributes across the remaining three scored categories.

Did MIPS performance category weights change for 2026?

No, CMS held the standard weights unchanged from 2025: Quality 30 percent, Cost 30 percent, Promoting Interoperability 25 percent, and Improvement Activities 15 percent, per the November 5, 2025 Physician Fee Schedule Final Rule.

Can a MIPS performance category be reweighted to zero percent?

Yes, CMS automatically reweights Promoting Interoperability to 0 percent for ASC-based, hospital-based, non-patient-facing, and small-practice clinicians (15 eligible clinicians or fewer). Other MIPS Performance Categories can be reweighted to 0 percent through an approved Hardship Exception or when insufficient data prevents CMS from scoring the category.

Is Cost the only MIPS category CMS calculates without clinician submission?

Yes, CMS calculates Cost performance directly from Medicare Part B claims, as clinicians submit no Cost data. The other three MIPS Performance Categories (Quality, Promoting Interoperability, and Improvement Activities) require active clinician submission during the performance year.

Do the four MIPS performance categories apply to MVP reporting?

Yes, MIPS Value Pathways cover all four MIPS Performance Categories. Promoting Interoperability functions as a foundation layer across all 27 MVPs for 2026, and each MVP bundles specialty-specific Quality, IA, and Cost measures alongside the PI foundation layer.