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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Michael Ein, MD

Infectious Disease Physician in Concord, CA · enumerated 2006.

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

National Provider Identifier

1023191459

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Registry record

Entity type Individual (Type 1)
Name Michael Ein
Credential MD
Sex Male
Practice address Concord, CA, 94519
Phone (925) 753-1986
Enumeration date Oct 21, 2006
Last updated in NPPES Mar 21, 2017

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License G277481 (CA) Primary
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

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Frequently asked questions

Where does Michael Ein practice?
The practice location on file with NPPES is in Concord, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Michael Ein?
The National Provider Identifier (NPI) for Michael Ein is 1023191459, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-03-21.