Roy Guillermo
NPI 1548100456 · Addiction (Substance Use Disorder) Counselor · San Diego, CA
Roy Guillermo is a Addiction (Substance Use Disorder) Counselor provider in San Diego, CA (NPI 1548100456).
Provider details
- NPI number
- 1548100456
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in registry
- Profile completeness38% of score
83% 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2026-03-30
- Last updated
- 2026-04-22
- Certified
- 2026-04-22
Frequently asked questions
- What is Roy Guillermo's NPI number?
- Roy Guillermo's National Provider Identifier (NPI) is 1548100456, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Roy Guillermo's specialty?
- Roy Guillermo is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is Roy Guillermo located?
- Roy Guillermo's practice location on file with NPPES is 3288 El Cajon Blvd, San Diego, CA 92104-1430.
- What is Roy Guillermo's phone number?
- The practice phone number listed in the NPPES registry for Roy Guillermo is (619) 232-6454.
- Is Roy Guillermo's NPI active?
- Yes — Roy Guillermo's NPI (1548100456) is active in the NPPES registry as of the last update on 2026-04-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.