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DR. ZACHARY BONZELL MD
NPI 1669111720
Psychiatry & Neurology - Psychiatry in San Francisco, CA

Active since May 27, 2022PECOS Enrolled
675 18TH ST, SAN FRANCISCO, CA 94143(510) 333-1390 Get Directions Write a Review

NPPES record last updated: November 3, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 3, 2025, Jun 30, 2025, May 27, 2022 (3 updates tracked since 2022).

About Dr. Zachary Bonzell Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. ZACHARY BONZELL MD (NPI 1669111720) is an individual psychiatry provider in San Francisco, California, licensed in California (A201283) and active in the NPI registry since May 2022. He is enrolled in Medicare PECOS, maintains a secondary practice location in San Francisco, and is a graduate of University Of Southern California Keck School Of Medicine (2022).

NPPES Registry Identity

NPI1669111720
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameDR. ZACHARY BONZELLCredential: MD
Location Address675 18TH STSan Francisco, CA 94143-4200
Mailing Address5649 Castle DrOakland, CA 94611-2727 · (510) 333-1390
Phone(510) 333-1390
Sole ProprietorNo
Medical School CMSUniversity Of Southern California Keck School Of MedicineGraduated 2022
Enumeration DateMay 27, 2022
Last NPPES UpdateNovember 3, 20253 updates tracked since enumeration
NPPES CertifiedNovember 3, 2025
✔ NPI 1669111720 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in CA · A201283
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
675 18TH ST, San Francisco, CA 94143
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Secondary Practice Location 1

Location 11801 Vicente StSan Francisco, CA 94116-2923 · Phone (415) 681-3211

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Zachary Bonzell Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID3870061492
PECOS Enrollment IDI20260501001753
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Zachary Bonzell reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Alameda Health System
8.9 mi
Clinic/Center
501 S SHORE CTR W, SUITE A-F
Alameda, CA 94501
  • Reassigned Medicare billing, California enrollment
  • 900 clinicians in this Medicare group
NPI 1124446158 (510) 814-4630
County Of Santa Clara
28 mi
Clinic/Center
2741 MIDDLEFIELD RD
Palo Alto, CA 94306
  • Reassigned Medicare billing, California enrollment
  • 2,460 clinicians in this Medicare group
NPI 1285228080 (408) 885-5000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94143 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$202.35 typical visit price
range $69.00 – $202.35
Typical copayment $50.58 (range $17.25 – $50.58)
Most-billed visit code 99205
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

CAROLINE CHIU
Student in an Organized Health Care Education/Training Program
675 18TH ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-7000
TIFFANY ROXANA GHADIMI MD
Psychiatry & Neurology (Psychiatry)
675 18TH ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-7527
DR. TAE UN KIM DO
Psychiatry & Neurology (Psychiatry)
675 18TH ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-7000
MR. DAMON JOHNSON LCSW
Social Worker
675 18TH ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-7000
ELIZABETH CADY SMITH MD
Psychiatry & Neurology (Psychiatry)
675 18TH ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-7527
SARAH DOLAN
Student in an Organized Health Care Education/Training Program
675 18TH ST
SAN FRANCISCO, CA 94143
San Francisco County (628) 588-6399
ERIN ELIZABETH REILLY PHD
Psychologist (Clinical Child & Adolescent)
675 18TH ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 514-6869
RACHEL N. NIEZRECKI MD
Psychiatry & Neurology (Psychiatry)
675 18TH ST
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-7000

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Zachary Bonzell's NPI number?

The NPI number for Zachary Bonzell is 1669111720. It was assigned to this individual provider in the NPPES registry on May 27, 2022.

Where is Zachary Bonzell located?

Zachary Bonzell practices at 675 18th St, San Francisco, CA 94143. The listed phone number is (510) 333-1390.

What is Zachary Bonzell's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Zachary Bonzell enrolled in Medicare?

Yes. Zachary Bonzell is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Zachary Bonzell's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Zachary Bonzell reassigns Medicare benefits to 2 organizations: Alameda Health System (Alameda, CA) and County Of Santa Clara (Palo Alto, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Zachary Bonzell's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Zachary Bonzell was last updated on November 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.