Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michael Cassidy, M.D.

Specialist in Berkeley, CA · enumerated 2005.

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

National Provider Identifier

1780673442

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael Cassidy

Credential M.D.

Sex Male

Practice address 2001 Dwight Way, Berkeley, CA, 94704

Phone (510) 204-1591

Fax (510) 204-6440

Enumeration date Oct 17, 2005

Last updated in NPPES Jul 13, 2026

Taxonomy & licenses

174400000X Specialist Other Service Providers · License G330960 (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
GR0089940	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 Cassidy's NPI record?

Cross-check NPI 1780673442 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1780673442 active?

Yes, as of the latest NPPES snapshot, NPI 1780673442 is active (record last updated 2026-07-13).

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