What is Guillermo Castillo's NPI number?

Guillermo Castillo's National Provider Identifier (NPI) is 1003916818, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Guillermo Castillo's specialty?

Guillermo Castillo is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).

Where is Guillermo Castillo located?

Guillermo Castillo's practice location on file with NPPES is 930 E Florida Ave, Hemet, CA 92543-4530.

What is Guillermo Castillo's phone number?

The practice phone number listed in the NPPES registry for Guillermo Castillo is (951) 652-1312.

Is Guillermo Castillo's NPI active?

Yes — Guillermo Castillo's NPI (1003916818) is active in the NPPES registry as of the last update on 2008-08-20.

IndividualActive

Guillermo Castillo, D.D.S.

NPI 1003916818 · General Practice Dentistry · Hemet, CA

Guillermo Castillo, D.D.S. is a General Practice Dentistry provider in Hemet, CA (NPI 1003916818).

Provider details

NPI number: 1003916818
Entity type: Individual
Primary specialty: General Practice DentistryDental Providers
Credential: D.D.S.
Sex: Male
Sole proprietor: No
License: 50896 (CA)

Practice location

930 E Florida Ave

Suite B

Hemet, CA 92543-4530

Phone: (951) 652-1312

Fax: (951) 652-0771

Street-level locationGet directions

More CA providers

Mailing address

930 E Florida Ave

Hemet, CA 92543-4530

Specialties & taxonomies

General Practice DentistryPrimary1223G0001XLicense 50896 (CA)
Dental Providers

Profile Score

Detailed profile(91/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
20 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

What this provider prescribes (Medicare Part D)

Top drugs by Medicare Part D claim volume, 2024 · 1 distinct drug on file.

Drug	Part D claims (2024)	Beneficiaries
Amoxicillin	14	12

Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do not include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.

Enumerated: 2006-09-22
Last updated: 2008-08-20

Frequently asked questions

What is Guillermo Castillo's NPI number?: Guillermo Castillo's National Provider Identifier (NPI) is 1003916818, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Guillermo Castillo's specialty?: Guillermo Castillo is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
Where is Guillermo Castillo located?: Guillermo Castillo's practice location on file with NPPES is 930 E Florida Ave, Hemet, CA 92543-4530.
What is Guillermo Castillo's phone number?: The practice phone number listed in the NPPES registry for Guillermo Castillo is (951) 652-1312.
Is Guillermo Castillo's NPI active?: Yes — Guillermo Castillo's NPI (1003916818) is active in the NPPES registry as of the last update on 2008-08-20.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

What this provider prescribes (Medicare Part D)

Registry dates

Frequently asked questions

Specialties & taxonomies

Profile Score

What this provider prescribes (Medicare Part D)

Frequently asked questions