Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michael Sullivan, MD

Anesthesiology Physician in Duarte, CA · enumerated 2006.

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

National Provider Identifier

1598722381

Verified

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael Sullivan

Credential MD

Sex Male

Practice address 1500 E Duarte Rd, Duarte, CA, 91010

Phone (626) 359-8111

Enumeration date Apr 27, 2006

Last updated in NPPES Nov 13, 2020

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License G73318 (CA) Secondary

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License G73318 (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
00G733180	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Michael Sullivan practice?

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

What is the NPI number for Michael Sullivan?

The National Provider Identifier (NPI) for Michael Sullivan is 1598722381, 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 2020-11-13.