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

Alexander Jeziorek

Marriage & Family Therapist in Berkeley, CA · enumerated 2021.

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

National Provider Identifier

1457018152

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Registry record

Entity type Individual (Type 1)

Name Alexander Jeziorek

Sex Male

Practice address Berkeley, CA, 94705

Phone (510) 982-6469

Enumeration date Nov 17, 2021

Last updated in NPPES Jan 27, 2025

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

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers Primary

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

What specialty is Alexander Jeziorek?

Alexander Jeziorek is registered in NPPES with the primary taxonomy of Marriage & Family Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Donna Moriguchi Clinical Psychologist · Berkeley, CA NPI 1659622413

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-01-27.