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ROY GUILLERMO
NPI 1548100456
Counselor - Addiction (Substance Use Disorder) in San Diego, CA

Active since March 30, 2026
3288 EL CAJON BLVD, SAN DIEGO, CA 92104(619) 232-6454 Get Directions Write a Review

NPPES record last updated: April 22, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Apr 22, 2026, Mar 30, 2026 (2 updates tracked since 2026).

About Roy Guillermo NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ROY GUILLERMO (NPI 1548100456) is an individual addiction (substance use disorder) provider in San Diego, California and active in the NPI registry since March 2026.

NPPES Registry Identity

NPI1548100456
Entity TypeIndividualMale
Primary Taxonomy101YA0400X
Provider Legal NameROY GUILLERMO
Location Address3288 EL CAJON BLVDSan Diego, CA 92104-1430
Mailing Address3288 El Cajon BlvdSan Diego, CA 92104-1430
Phone(619) 232-6454
Sole ProprietorNo
Enumeration DateMarch 30, 2026
Last NPPES UpdateApril 22, 20262 updates tracked since enumeration
NPPES CertifiedApril 22, 2026
✔ NPI 1548100456 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyCounselor · Addiction (Substance Use Disorder)Behavioral Health & Social Service Providers
Taxonomy Code101YA0400X
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
3288 EL CAJON BLVD, San Diego, CA 92104
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Other Providers at the Same Location NPPES 7

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MARTINA SHERMAN
Counselor (Addiction (Substance Use Disorder))
3288 EL CAJON BLVD
SAN DIEGO, CA 92104
San Diego County (619) 521-5720
MR. MIKE GEORGE BRENNAN M.F.T.
Marriage & Family Therapist
3288 EL CAJON BLVD, SUITE 2
SAN DIEGO, CA 92104
San Diego County (619) 944-5559
KARLA VERONICA ESPINOZA
Counselor (Addiction (Substance Use Disorder))
3288 EL CAJON BLVD
SAN DIEGO, CA 92104
San Diego County (195) 215-7206
MRS. MELLIE BAUTISTA DUDKIN
Counselor (Addiction (Substance Use Disorder))
3288 EL CAJON BLVD, SUITE 13
SAN DIEGO, CA 92104
San Diego County (619) 521-5720
MARIANA DIAZ
Marriage & Family Therapist
3288 EL CAJON BLVD
SAN DIEGO, CA 92104
San Diego County (619) 521-5720
LYNETTE GASTELUM
Counselor (Addiction (Substance Use Disorder))
3288 EL CAJON BLVD
SAN DIEGO, CA 92104
San Diego County (619) 521-5720
CURTIS EUGENE SWAFFORD I
Counselor (Addiction (Substance Use Disorder))
3288 EL CAJON BLVD
SAN DIEGO, CA 92104
San Diego County (619) 521-5720

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Roy Guillermo's NPI number?

The NPI number for Roy Guillermo is 1548100456. It was assigned to this individual provider in the NPPES registry on March 30, 2026.

Where is Roy Guillermo located?

Roy Guillermo practices at 3288 El Cajon Blvd, San Diego, CA 92104. The listed phone number is (619) 232-6454.

What is Roy Guillermo's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Addiction (Substance Use Disorder), with taxonomy code 101YA0400X.

When was this NPI record last updated?

The NPPES record for Roy Guillermo was last updated on April 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.