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Data Sources

VeriflowAPI aggregates and normalizes data from multiple authoritative government sources. This page explains what each source covers, how frequently data is refreshed, and what happens when a source is temporarily unavailable.

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Federal Sources

These sources are checked on every verification request regardless of state.

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NPPES NPI Registry

The National Plan and Provider Enumeration System is the federal database of all healthcare providers who have been assigned a National Provider Identifier.
DetailValue
CoverageAll 50 US states
Data includesName, NPI, taxonomy, practice address, credential status
Refresh frequencyDaily bulk download
Cache TTL24 hours
Managed byCenters for Medicare & Medicaid Services (CMS)
The NPPES database is the foundation of every verification. Even when a state board is temporarily unavailable, NPI data ensures you always receive a meaningful baseline response.

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OIG Exclusion List

The Office of Inspector General maintains a list of individuals and entities excluded from participation in federal healthcare programs (Medicare, Medicaid, etc.). Hiring or contracting with an excluded provider can result in significant civil penalties.
DetailValue
CoverageAll 50 US states
Data includesName, NPI, exclusion type, exclusion date, reinstatement date
Refresh frequencyMonthly official update, checked every 12 hours
Cache TTL12 hours
Managed byHHS Office of Inspector General
If oig_excluded is true, the provider must not be employed or contracted by any entity receiving federal healthcare funding. This is a hard disqualifier in most onboarding workflows.

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State Sources — Big 5

Full real-time license status is available for the five states that collectively account for approximately 40% of US telehealth volume.

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California Medical Board

DetailValue
License typesMD, DO, and postgraduate trainees
Data includesLicense number, status, expiry, disciplinary actions, probation
Cache TTL24 hours

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Texas Medical Board

DetailValue
License typesMD, DO
Data includesLicense number, status, expiry, board actions
Cache TTL24 hours

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New York Office of the Professions

DetailValue
License typesMD, DO, and 50+ other professions
Data includesLicense number, status, expiry, disciplinary history
Cache TTL24 hours

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Florida Department of Health

DetailValue
License typesMD, DO, ARNP, PA, and others
Data includesLicense number, status, expiry, complaint history
Cache TTL24 hours

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Illinois Division of Professional Regulation

DetailValue
License typesMD, DO, and allied health professions
Data includesLicense number, status, expiry
Cache TTL24 hours

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What happens when a source is down

Government websites experience downtime — planned maintenance, traffic spikes, infrastructure migrations. VeriflowAPI is architected to handle this gracefully. When a source is unavailable during a request:
  1. VeriflowAPI serves the most recent cached data for that source
  2. The response includes "source_live": false and "cached": true
  3. The cache_expires_at field tells you when fresh data will next be fetched
  4. Our monitoring system detects the outage and begins retry attempts automatically
This approach ensures our 99.9% uptime SLA holds even when individual government sites experience extended downtime. You can always check current source availability at status.veriflowapi.com.

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Remaining states

For the 45 states not in the Big 5, VeriflowAPI returns NPPES and OIG data which covers federal credential status. State-level license status for remaining states is on our roadmap. If you have an urgent need for a specific state, email support@veriflowapi.com — we prioritize state additions based on customer demand.

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Coming soon

ProfessionStatus
Registered Nurses (NURSYS)In development
Pharmacists (NABP)In development
Contractors (state by state)Planned
Mental health practitionersPlanned
Bar admission / AttorneysPlanned