Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexander Robert Jack, M.D.

Dermatology Physician in Ladera Ranch, CA · enumerated 2009 · practices at Elizabeth V. Lener, M.D., Inc..

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

National Provider Identifier

1346482627

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Registry record

Entity type Individual (Type 1)

Name Alexander Robert Jack

Credential M.D.

Sex Male

Practice address 600 Corporate Dr Ste 240, Ladera Ranch, CA, 92694

Phone (949) 364-8411

Enumeration date Apr 1, 2009

Last updated in NPPES Dec 22, 2022

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License C179601 (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

Where does Alexander Jack practice?

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

What is the NPI number for Alexander Jack?

The National Provider Identifier (NPI) for Alexander Jack is 1346482627, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Elizabeth V. Lener, M.D., Inc. Dermatology Physician · Ladera Ranch, CA NPI 1407989148

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-12-22.