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Dr. Ann Margaret Petru, M.D.

Pediatric Infectious Diseases Physician in Oakland, CA · enumerated 2006.

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

National Provider Identifier

1568490878

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Registry record

Entity type Individual (Type 1)
Name Dr. Ann Margaret Petru
Credential M.D.
Sex Female
Practice address 747 Fifty-Second Street, Oakland, CA, 94609
Phone (510) 428-3337
Fax (510) 601-3957
Enumeration date Jun 28, 2006
Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License G40627 (CA) Secondary
2080P0208X Pediatric Infectious Diseases Physician Allopathic & Osteopathic Physicians · License G40627 (CA) 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
CGP160130 Other CA CCS CONSULTANT NUMBER
00G406270 Medicaid CA -
CGP 089750 Other CA CCS PROVIDER NUMBER

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 specialty is Ann Petru?
Ann Petru is registered in NPPES with the primary taxonomy of Pediatric Infectious Diseases Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.