Physician Profile
Regina P. Castillo, D.M.D.
Unclaimed ProfileAbout Dr. Castillo
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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.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (510) 786-4501
- Email not available
Practice Locations
28472 HESPERIAN BLVD
Hayward, CA 94545
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 dentists at this location 1
Same specialty, same street address — most likely the same department or group.
Common questions
What kind of doctor is Regina P. Castillo?
Regina P. Castillo is a dentist in Hayward, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “General Practice Dentistry”.
NPI registry
What is Regina P. Castillo's address?
Regina P. Castillo is listed at 28472 Hesperian Blvd, Hayward, CA 94545. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Regina P. Castillo?
The number on file is (510) 786-4501. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Regina P. Castillo's NPI number?
Regina P. Castillo's National Provider Identifier is 1821209966. 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 Regina P. Castillo been practicing?
Regina P. Castillo has 19+ years experience. Registered with an NPI since 2007. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
Has Regina P. Castillo confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Regina P. Castillo. 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.