Ernest De Guzman, M.D.
NPI 1801914544 · Psychiatry Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ernest De Guzman, M.D. is a Psychiatry Physician provider in San Diego, CA (NPI 1801914544).
Provider details
- NPI number
- 1801914544
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A95424 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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 · 39 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 191 | 32 |
| Alprazolam | 172 | 31 |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 170 | 23 |
| Bupropion Hclbrand: Bupropion Xl | 163 | 22 |
| Trazodone Hcl | 143 | 26 |
| Fluoxetine Hcl | 119 | 21 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-27
- Last updated
- 2014-09-19
Frequently asked questions
- What is Ernest De Guzman's NPI number?
- Ernest De Guzman's National Provider Identifier (NPI) is 1801914544, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ernest De Guzman's specialty?
- Ernest De Guzman is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Ernest De Guzman located?
- Ernest De Guzman's practice location on file with NPPES is 6973 Linda Vista Road, San Diego, CA 92111-6342.
- What is Ernest De Guzman's phone number?
- The practice phone number listed in the NPPES registry for Ernest De Guzman is (858) 279-9676.
- Does Ernest De Guzman accept Medicare?
- Ernest De Guzman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ernest De Guzman's NPI active?
- Yes — Ernest De Guzman's NPI (1801914544) is active in the NPPES registry as of the last update on 2014-09-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.