Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexander Doru Stein, MD

Dermatology Physician in Chula Vista, CA · enumerated 2006.

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

National Provider Identifier

1760431654

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Registry record

Entity type Individual (Type 1)

Name Alexander Doru Stein

Credential MD

Sex Male

Practice address 340 Fourth Ave Ste 14, Chula Vista, CA, 91910

Phone (718) 753-6536

Fax (619) 258-0028

Enumeration date May 8, 2006

Last updated in NPPES Feb 17, 2021

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License MD036056 (DC) Secondary

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License A106295 (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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Alexander Stein?

The National Provider Identifier (NPI) for Alexander Stein is 1760431654, a Type 1 (individual) record in the CMS NPPES registry.

Where does Alexander Stein practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-02-17.