Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael T Duffy, M.D.

Specialist in Beverly Hills, CA · enumerated 2006.

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

National Provider Identifier

1689635328

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Registry record

Entity type Individual (Type 1)

Name Michael T Duffy

Credential M.D.

Sex Male

Practice address 9400 Brighton Way, Suite 201, Beverly Hills, CA, 90210

Phone (310) 271-6229

Fax (310) 271-9139

Enumeration date Mar 31, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

174400000X Specialist Other Service Providers · License G59599 (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
00G595992	Medicaid	CA	-

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

How do I verify Michael Duffy's NPI record?

Cross-check NPI 1689635328 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1689635328 active?

Yes, as of the latest NPPES snapshot, NPI 1689635328 is active (record last updated 2007-07-08).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.