Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Headdox Inc

Physiological Laboratory in Chicago, IL · enumerated 2022 · authorized official Frank Gray, Director.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1871212449

Verified

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Registry record

Entity type Organization (Type 2)

Legal business name Headdox Inc

Practice address 2625 N Clark St Unit 1s, Chicago, IL, 60614

Phone (844) 212-5321

Fax (214) 594-9559

Enumeration date Aug 25, 2022

Last updated in NPPES Aug 25, 2022

Taxonomy & classification

293D00000X Physiological Laboratory Laboratories Primary

Authorized official

Name Frank Gray

Title Director

Phone (844) 212-5321

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2022-08-25. Verify at npiregistry.cms.hhs.gov.

Where is Headdox Inc located?

The practice location on file with NPPES is in Chicago, IL.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-25.