Provider Profile
Gemma Diaz
Unclaimed ProfileAbout Gemma Diaz
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Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Contact Information
- (866) 727-8274
- Email not available
Practice Locations
337 N VINEYARD AVE STE 301
Ontario, CA 91764
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other providers at this location 8
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Common questions
Where is Gemma Diaz located?
Gemma Diaz is listed at 337 N Vineyard Ave Ste 301, Ontario, CA 91764. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Gemma Diaz's phone number?
The number on file is (866) 727-8274. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Gemma Diaz's NPI number?
Gemma Diaz's National Provider Identifier is 1407581416. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
How long has Gemma Diaz been practicing?
Gemma Diaz has 4+ years experience. Registered with an NPI since 2022. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
Has Gemma Diaz confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Gemma Diaz. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.