Gregory Mazzie, PHARMD
NPI 1639954753 · Psychiatric Pharmacist · San Jose, CA
Gregory Mazzie, PHARMD is a Psychiatric Pharmacist provider in San Jose, CA (NPI 1639954753).
Provider details
- NPI number
- 1639954753
- Entity type
- Individual
- Primary specialty
- Psychiatric PharmacistPharmacy Service Providers
- Credential
- PHARMD
- Sex
- Male
- Sole proprietor
- No
- License
- 88049 (CA)
Specialties & taxonomies
Pharmacy Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
2 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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 33 | 25 |
| Lamotrigine | 22 | 19 |
| Aripiprazole | 19 | 11 |
| Risperidone | 19 | 13 |
| Gabapentin | 17 | 12 |
| Sertraline Hcl | 15 | — |
| Trazodone Hcl | 14 | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-08-28
- Last updated
- 2023-08-28
- Certified
- 2023-08-28
Frequently asked questions
- What is Gregory Mazzie's NPI number?
- Gregory Mazzie's National Provider Identifier (NPI) is 1639954753, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Mazzie's specialty?
- Gregory Mazzie is listed in the NPPES registry with a primary specialty of Psychiatric Pharmacist (Pharmacy Service Providers).
- Where is Gregory Mazzie located?
- Gregory Mazzie's practice location on file with NPPES is 250 Hospital Pkwy, San Jose, CA 95119-1103.
- What is Gregory Mazzie's phone number?
- The practice phone number listed in the NPPES registry for Gregory Mazzie is (408) 972-3000.
- Is Gregory Mazzie's NPI active?
- Yes — Gregory Mazzie's NPI (1639954753) is active in the NPPES registry as of the last update on 2023-08-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.