Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Rob A. Maestretti, PA

Medical Physician Assistant in Oakland, CA · enumerated 2007.

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

National Provider Identifier

1558556423

Verified

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Registry record

Entity type Individual (Type 1)

Name Mr. Rob A. Maestretti

Credential PA

Sex Male

Practice address 275 W Macarthur Blvd, Oakland, CA, 94611

Phone (510) 752-1000

Enumeration date Sep 13, 2007

Last updated in NPPES Jan 3, 2022

Taxonomy & licenses

225200000X Physical Therapy Assistant Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License AT 5950 (CA) Secondary

363AM0700X Medical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 20208 (CA) Primary

PA · Physician Assistant: A licensed clinician who practices medicine in collaboration with physicians, trained in a graduate PA program. About the PA credential

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Rob Maestretti practice?

The practice location on file with NPPES is in Oakland, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Rob Maestretti?

The National Provider Identifier (NPI) for Rob Maestretti is 1558556423, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-01-03.