Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Alexander Horwitz, MD

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1891317954

Dr. Alexander Horwitz, MD is a Student in an Organized Health Care Education/Training Program in Napa, California. Works from 4 locations. Licensed in California.

Licensed in
CA
In the registry since
2020
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2100 Napa Vallejo Hwy
Napa, CA 94558-6234
Phone: (707) 253-5000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 10333 El Camino Real, Atascadero, CA 93422-5808 — (805) 468-2000
  • Hillmont Psychiatric Center, Ventura, CA 93003 — (805) 652-6729
  • 147 N Brent St, Ventura, CA 93003-2854 — (805) 948-5672

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence A181639 (CA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X · Licence A181639 (CA)

Record details

NPI number1891317954
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 12, 2020
Last updated in NPPESAugust 10, 2025
Certification dateAugust 10, 2025
Mailing address2100 Napa Vallejo Hwy, Napa, CA 94558-6234

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