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Ann Phillips Seide, MD

Hospitalist Physician in Thousand Oaks, CA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1649203084

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Registry record

Entity type Individual (Type 1)
Name Ann Phillips Seide
Credential MD
Sex Female
Practice address 215 W Janss Rd, Thousand Oaks, CA, 91360
Phone (805) 497-2727
Enumeration date Jul 9, 2006
Last updated in NPPES Jun 16, 2018

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License MD00040843 (WA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
1649203084 Medicaid WA -
0158007 Other WA L&I
P01250820 Other WA RR MEDICARE

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

What is the NPI number for Ann Seide?
The National Provider Identifier (NPI) for Ann Seide is 1649203084, a Type 1 (individual) record in the CMS NPPES registry.
Where does Ann Seide practice?
The practice location on file with NPPES is in Thousand Oaks, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-06-16.