Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Robert S. Ferretti, M. D.

Orthopaedic Surgery Physician in Greenbrae, CA · enumerated 2006.

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

National Provider Identifier

1598701211

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Registry record

Entity type Individual (Type 1)

Name Dr. Robert S. Ferretti

Credential M. D.

Sex Male

Practice address 599 Sir Francis Drake Blvd, #302, Greenbrae, CA, 94904

Phone (415) 925-3521

Fax (415) 461-4971

Enumeration date Jun 21, 2006

Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License G18512 (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
00G185120	Other	CA	BLUE SHIELD PROVIDER #
00G185120	Medicaid	CA	-
00G185120	Other	CA	BLUE CROSS PROVIDER #

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

Is NPI 1598701211 active?

Yes, as of the latest NPPES snapshot, NPI 1598701211 is active (record last updated 2007-07-09).

How do I verify Robert Ferretti's NPI record?

Cross-check NPI 1598701211 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.