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

Robert I Ostroff, MD

Individual provider Internal Medicine Physician · NPI 1912109240

Robert I Ostroff, MD is an Internal Medicine Physician in Petaluma, California. Licensed in California. Registered with an NPI since 2007.

Licensed in
CA
In the registry since
2007
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

400 N McDowell Blvd
Petaluma, CA 94954-2339
Phone: (707) 778-1111
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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 G23046 (CA)

Record details

NPI number1912109240
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 31, 2007
Last updated in NPPESJuly 24, 2007
Mailing address1310 Commerce St, Suite B, Petaluma, CA 94954-1469

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