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

Dr. Aaron Barak Neinstein, MD

Individual provider Clinical Informatics Physician · NPI 1205074028

Dr. Aaron Barak Neinstein, MD is an Endocrinology in San Francisco, California. Graduated from University of Southern California Keck School of Medicine in 2007, 19 years ago. Practices with Regents of the University of California, a 717-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
19
Trained at
University of Southern California Keck School of Medicine
Licensed in
CA
In the registry since
2009
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

400 Parnassus Ave Ste A550
San Francisco, CA 94143
Phone: (415) 353-2350
Fax: (415) 353-2337
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Endocrinology, Diabetes & Metabolism Physician (primary) Taxonomy 207RE0101X · Licence A106501 (CA)
Clinical Informatics Physician Taxonomy 2083C0008X · Licence A106501 (CA)

Record details

NPI number1205074028
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 2, 2009
Last updated in NPPESMay 15, 2018

Medicare enrollment

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

Medicare specialtyENDOCRINOLOGY
Also practisesINTERNAL MEDICINE
Medical schoolUNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE
Graduated 2007 (19 years in practice)
Group practice Regents Of The University Of California — 717 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Other providers in San Francisco