Zachary Bonzell, MD
NPI 1669111720 · Psychiatry Physician · San Francisco, CA
Zachary Bonzell, MD is a Psychiatry Physician provider in San Francisco, CA (NPI 1669111720).
Provider details
- NPI number
- 1669111720
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A201283 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
4 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 7 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Aripiprazole | 24 |
| Quetiapine Fumarate | 21 |
| Risperidone | 20 |
| Citalopram Hydrobromidebrand: Citalopram Hbr | 16 |
| Trazodone Hcl | 16 |
| Benztropine Mesylate | 13 |
| Escitalopram Oxalate | 12 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$402 across 7 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1801 Vicente StSan Francisco, CA 94116-2923Phone: (415) 681-3211
Registry dates
- Enumerated
- 2022-05-27
- Last updated
- 2025-11-03
- Certified
- 2025-11-03
Frequently asked questions
- What is Zachary Bonzell's NPI number?
- Zachary Bonzell's National Provider Identifier (NPI) is 1669111720, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zachary Bonzell's specialty?
- Zachary Bonzell is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Zachary Bonzell located?
- Zachary Bonzell's practice location on file with NPPES is 675 18th St, San Francisco, CA 94143-4200.
- What is Zachary Bonzell's phone number?
- The practice phone number listed in the NPPES registry for Zachary Bonzell is (510) 333-1390.
- Is Zachary Bonzell's NPI active?
- Yes — Zachary Bonzell's NPI (1669111720) is active in the NPPES registry as of the last update on 2025-11-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.