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

John Sullivan, MD

Individual provider Internal Medicine Physician · NPI 1558756262

John Sullivan, MD is an Internal Medicine Physician in Thousand Oaks, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2015
Specialties on file
3
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

1 Amgen Center Dr 38-4-C
Thousand Oaks, CA 91320-1730
Phone: (805) 447-4429
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 50369 (CA)
Addiction Medicine (Internal Medicine) Physician Taxonomy 207RA0401X · Licence 50369 (CA)
Clinical Pharmacology Physician Taxonomy 208U00000X · Licence 50369 (CA)

Record details

NPI number1558756262
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMarch 30, 2015
Last updated in NPPESMarch 30, 2015
Mailing address1 Amgen Center Dr, 38-4-C, Thousand Oaks, CA 91320-1730

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