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

Timothy M Sowerby, MD

Individual provider Gastroenterology Physician · NPI 1063475952

Timothy M Sowerby, MD is a Gastroenterology Physician in Petaluma, California. Licensed in California. Registered with an NPI since 2006.

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

3900 Lakeville Hwy
Petaluma, CA 94954-5698
Phone: (707) 765-3900
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence A50116 (CA)
Gastroenterology Physician Taxonomy 207RG0100X · Licence A050116 (CA)

Record details

NPI number1063475952
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 11, 2006
Last updated in NPPESJanuary 15, 2026
Certification dateJanuary 15, 2026
Mailing address3900 Lakeville Hwy, Petaluma, CA 94954-5698

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