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

Alexander N Greiner, MD

Individual provider Allergy & Immunology Physician · NPI 1609801299

Alexander N Greiner, MD is an Allergy/Immunology in San Diego, California. Graduated from State University of Ny Upstate Medical University in 1998, 28 years ago. Practices with Rady Children's Hospital San Diego, a 161-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
28
Trained at
State University of Ny Upstate Medical University
Licensed in
CA
In the registry since
2006
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

5776 Ruffin Rd
San Diego, CA 92123-1013
Phone: (858) 292-1144
Fax: (858) 268-5145
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Allergy & Immunology Physician (primary) Taxonomy 207K00000X · Licence A77327 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A77327 (CA)

Record details

NPI number1609801299
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 11, 2006
Last updated in NPPESMarch 14, 2016

Medicare enrollment

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

Medicare specialtyALLERGY/IMMUNOLOGY
Medical schoolSTATE UNIVERSITY OF NY UPSTATE MEDICAL UNIVERSITY
Graduated 1998 (28 years in practice)
Group practice Rady Children'S Hospital San Diego — 161 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 on file with Medicare

Other providers in San Diego