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

Loretta Margaret Obrien, MD

Individual provider Infectious Disease Physician · NPI 1750379657

Loretta Margaret Obrien, MD is an Infectious Disease Physician in Livermore, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2005
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

4951 Arroyo Rd Livermore Division General Medical Clinic
Livermore, CA 94550-9650
Phone: (925) 373-4700
Show map & directions

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

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence G 87855 (CA)

Record details

NPI number1750379657
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 13, 2005
Last updated in NPPESOctober 23, 2008