FoxIndex / Methodology
v.2026
How we define quality

FoxIndex

Measure what matters: outcomes.

FoxIndex helps employers and employees compare providers and facilities using risk-adjusted clinical outcomes, before care happens.

Provider performance analytics

Provider performance analytics for better healthcare decisions.

Better decisions start with better data.

Most employees have no way to evaluate the clinical quality of a provider or facility.

FoxIndex scores providers and facilities on real-world clinical outcomes across 100M+ patient episodes annually. It measures what actually matters: complication rates, readmissions, emergency visits, and recovery patterns. The Outfox answer engine pairs that with your plan's contracted rates so employees can compare cost and quality before they get care.

What we measure

Outcomes measured across the full episode of care.

Built from longitudinal claims data that captures what happens before, during, and after care.

Episode of care · structure Day 0 → Day 30–90
Trigger
Diagnosis or procedure
Care
Treatment, surgery, hospitalization
Recovery window
30–90 days, condition-dependent
Outcomes
What we measure
Complications Readmissions ER visits Length of stay Mortality (where applicable)
Day 0 The episode starts at the trigger event — the moment care begins.
Recovery window Length of the window depends on the condition. Knee replacement: 90 days. Acute MI: 30 days. Defined per condition, not arbitrary.
Outcome capture Every claim inside the window is attributed to the episode — even visits to other providers.
250+ episodes defined across acute, surgical, chronic, and behavioral conditions. Adapted from CMS BPCI episode definitions.
Methodology

Provider benchmarking using risk-adjusted outcomes.

Six steps from raw claims to a simple quality tier. Risk adjustment ensures providers are benchmarked fairly against peers in the same specialty and local market — based on the patients they actually treat.

01
SourceReal-world, multi-payer claims
Built from commercial and Medicare claims. Broad data allows apples-to-apples comparison across providers with different patient populations.
02
MeasureOutcomes across the episode
We track complications, readmissions, ER visits, and length of stay during the recovery window. Mortality is included where relevant.
03
AdjustRisk adjustment for patient complexity
Results are adjusted for age, comorbidities, HCC risk scores, prior utilization, and care setting. Providers are evaluated based on how their patients perform relative to expectations.
04
CompareObserved vs. expected
Performance is calculated as an observed-to-expected ratio. Below 1.0 indicates better-than-expected outcomes. Above 1.0 indicates worse.
05
BenchmarkSame specialty, same market
Providers are compared to peers in the same specialty and local market. This ensures fair, relevant comparisons.
06
TranslateSimple tiers and star ratings
Results are translated into clear tiers and star ratings so anyone can understand and act on them.
Better than peers
In line with peers
Worse than peers
Scale & coverage

What data powers FoxIndex?

Massive scale, local precision. Healthcare quality analytics built on a multi-payer claims data set spanning commercial and Medicare — enabling fair comparison within the same market.

100M+
People annually
National claims footprint
Multi-payer claims spanning commercial and Medicare.
ProvidersClinicians evaluated
745,000+
Provider groupsPractices and physician organizations
267,000+
HospitalsAcute-care facilities
5,900
Surgical centersAmbulatory surgical centers
5,200
Episodes definedEpisodes of care defined
250+
Numbers reflect the active FoxIndex panel as of Q1 2026. Score generation requires a minimum case volume per provider per episode to ensure statistical reliability; providers below threshold are reported as insufficient data rather than being miscategorized.
Facility comparison

Facility-level care decisions inside the network you already have.

The largest differences in healthcare spending often come from where care is delivered, not who delivers it.

FoxIndex scores every provider and facility on clinical outcomes. The Outfox answer engine shows what it will cost on your plan. Together, employees can compare hospitals, outpatient centers, imaging facilities, and surgery centers inside the network they already have — no carrier changes, no narrow networks.

Status Quo

Find a provider in-network

A directory listing. A star rating from patient reviews. No way to know if the facility is actually good or what it will actually cost.

With FoxIndex

Compare on cost and quality

Clinical outcomes and your price for each provider and facility, before you choose. Quality and cost, visible — like any other market.

Product

Cost and quality, shown together. So better decisions are possible.

A higher price doesn't mean better care, and the cheapest option isn't always the right one. Outfox's answer engine draws on two separate sources: Transparency in Coverage MRF data for contracted rates, and FoxIndex for clinical outcomes. Cost and quality are shown side by side, never blended into a single score.

MR

Marcus Reyes, MD

Orthopedic Surgery Charlotte, NC NPI 1043•••
Quality score
4 / 5
Better In line Worse
Areas of expertise · Knee replacement (90-day) vs. peers in same specialty
Complication rate major + minor
Much better than peers
30-day readmission any cause
Better than peers
ER visit rate within episode
In line with peers
Plan contracted rate
$24,180Total knee replacement, all-in
Metro median
$31,64049 in-network options
Cost and quality, side by side · never blended
i Benchmarked against orthopedic surgeons in the Charlotte, NC metro market. Adjusted for patient risk: age, comorbidities, HCC, prior utilization, care setting.
Beyond price transparency

Why price transparency alone is not enough.

Before price is even relevant, employees need to know what their plan covers, whether a provider is in network, and whether the care they're considering is the right care at all. A price file doesn't answer any of that.

The Outfox answer engine closes that gap. It answers plan design questions, checks network status, guides employees to the right site of care, and shows FoxIndex quality scores alongside contracted rates — so employees have everything they need to make a better decision, not just a cheaper one.

Employees still need help understanding
  • what their plan covers
  • where to go
  • how providers differ
  • whether higher-cost care actually delivers better outcomes
Frequently asked

Common questions about FoxIndex.

What is FoxIndex?

FoxIndex is Outfox Health's provider and facility quality scoring system. It uses risk-adjusted clinical outcomes — not consumer reviews — to help employees compare care options before they receive care.

Built on commercial and Medicare claims covering more than 100M lives annually, with 250+ episode types defined across acute, surgical, chronic, and behavioral conditions.

What data does FoxIndex use?

FoxIndex uses risk-adjusted clinical outcomes from real-world claims data. Source data spans commercial and Medicare claims covering more than 100M lives annually. Contracted rates come from Transparency in Coverage machine-readable files (MRF) and are shown alongside quality scores in the Outfox platform, not factored into FoxIndex scoring.

What is provider benchmarking in healthcare?

Provider benchmarking compares providers or facilities against similar peers using measures tied to healthcare outcomes, utilization patterns, and quality performance. FoxIndex benchmarks within the same specialty and local market, so comparisons reflect real alternatives a patient could choose.

How does FoxIndex support facility-level care decisions?

FoxIndex scores providers and facilities using risk-adjusted clinical outcomes. The Outfox answer engine brings in contracted rates from Transparency in Coverage MRF data so employees can compare cost and quality within their existing network — including hospitals, outpatient centers, imaging facilities, and ambulatory surgery centers. Rather than changing carriers or building narrow networks, employers can guide employees toward higher-value care using the network they already have.

How is FoxIndex different from healthcare price transparency tools?

Most price transparency tools show market or network averages and leave employees to figure out the rest. Outfox is different because it combines your plan's actual contracted rates, facility-level guidance, FoxIndex clinical outcomes, and a plain-language answer engine — so employees can compare cost and quality before they get care. FoxIndex is the quality layer: risk-adjusted outcomes benchmarked against local peers, built from a large-scale claims database.

How are providers risk-adjusted?

Results are adjusted for patient age, comorbidities, HCC risk scores, prior utilization, and care setting. Performance is calculated as an observed-to-expected ratio so providers are evaluated based on how their patients perform relative to expectations — not based on how complex their case mix happens to be.

Can employers license FoxIndex data separately?

No. FoxIndex is built into the Outfox platform and is included within both the Outfox Answer Engine and Den experiences.

FoxIndex is designed to support healthcare guidance and employee decision support inside the Outfox platform. It is not sold as a standalone data feed or separate analytics product. This allows Outfox to surface provider quality analytics and contracted rates side by side, within a single experience, from separate data sources.

See it on your network

Your plan already has high-quality providers. FoxIndex helps your employees find them.

See FoxIndex scores for your plan's network.

Book a demo