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

Alexander Louis Kostrinsky-Thomas, DO

Individual provider Student in an Organized Health Care Education/Training Program · NPI 1700528833

Alexander Louis Kostrinsky-Thomas, DO is a Hospitalist in San Francisco, California. Qualified in 2022, 4 years ago. Practices with Regents of the University of California, a 717-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
4
Licensed in
CA
In the registry since
2022
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

Student / training record This NPI belongs to someone enrolled in a health care training programme. It carries no licence and no practice of its own, so no address or phone number is published for it.

San Francisco, CA

Additional practice locations (1)

  • 751 S Bascom Ave, San Jose, CA 95128-2604 — (408) 885-5000

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence 20A21736 (CA)
Student in an Organized Health Care Education/Training Program Taxonomy 390200000X

Record details

NPI number1700528833
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 9, 2022
Last updated in NPPESJune 7, 2025
Certification dateJune 7, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2022 (4 years in practice)
Group practice Regents Of The University Of California — 717 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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