Patrick Fitzsimmons, M.D.
NPI 1528109550 · Psychiatry Physician · Los Gatos, CA
Patrick Fitzsimmons, M.D. is a Psychiatry Physician provider in Los Gatos, CA (NPI 1528109550).
Provider details
- NPI number
- 1528109550
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- G70088 (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 · 24 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Olanzapine | 51 |
| Clonazepam | 47 |
| Lorazepam | 46 |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 35 |
| Alprazolam | 32 |
| Fluoxetine Hcl | 26 |
| Duloxetine Hcl | 25 |
| Quetiapine Fumarate | 24 |
| Sertraline Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-11
- Last updated
- 2007-07-08
Frequently asked questions
- What is Patrick Fitzsimmons's NPI number?
- Patrick Fitzsimmons's National Provider Identifier (NPI) is 1528109550, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Patrick Fitzsimmons's specialty?
- Patrick Fitzsimmons is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Patrick Fitzsimmons located?
- Patrick Fitzsimmons's practice location on file with NPPES is 400 Carlton Ave, Los Gatos, CA 95032-2629.
- What is Patrick Fitzsimmons's phone number?
- The practice phone number listed in the NPPES registry for Patrick Fitzsimmons is (408) 358-2822.
- Is Patrick Fitzsimmons's NPI active?
- Yes — Patrick Fitzsimmons's NPI (1528109550) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.