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

Stephen W. Loo, DO

Individual provider Internal Medicine Physician · NPI 1174607162

Stephen W. Loo, DO is an Internal Medicine Physician in San Rafael, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
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.

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Practice location Address checks out

99 Montecillo Rd
San Rafael, CA 94903-3308
Phone: (415) 444-2000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 20A5422 (CA)

Record details

NPI number1174607162
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedOctober 25, 2006
Last updated in NPPESDecember 13, 2021
Mailing address1800 Harrison St Fl 7, Oakland, CA 94612-3466

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