UnitedHealth Group · Rate Limits
Unitedhealth Rate Limits
UnitedHealth Group does not publish public, numeric API rate limits. Throughput on the CMS Patient Access FHIR endpoints is governed by app-registration and member-consent flows; commercial Optum / UHC integrations have throughput defined per partner agreement.
2 Limits
Throttle: 429
HealthcareFHIRRate LimitingB2B
Limits
Patient Access FHIR app
see UHC / Optum developer portal app onboarding
CMS Patient Access endpoints; throughput tied to registered app and member consent.
Commercial integration contract
see Optum / UHC commercial agreement
Policies
App Registration
Patient Access FHIR clients must register through the UHC / Optum developer portal and meet CMS Patient Access conformance requirements.
Commercial Onboarding
Commercial throughput, concurrency, and SLAs are negotiated as part of Optum / UHC integration contracts, not published publicly.