Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexander Stempel

Physician Assistant in Madera, CA · enumerated 2015.

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

National Provider Identifier

1659764611

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Registry record

Entity type Individual (Type 1)

Name Alexander Stempel

Sex Male

Practice address 1250 E Almond Ave, Madera, CA, 93637

Phone (559) 675-5555

Enumeration date Mar 13, 2015

Last updated in NPPES Dec 22, 2023

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 52363 (CA) 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

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.

What specialty is Alexander Stempel?

Alexander Stempel is registered in NPPES with the primary taxonomy of Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Arthur Fontaine Diagnostic Radiology Physician · Madera, CA NPI 1225020845 California Emergency Physicians General Acute Care Hospital · Madera, CA NPI 1154310282 Christine Paley Nurse Practitioner · Madera, CA NPI 1336139708 Paula Duclo Family Nurse Practitioner · Madera, CA NPI 1952382350 Todd Spencer MD Medical Group, Inc. Specialist · Madera, CA NPI 1023082591 Valley Nuclear Medical Group Inc. Nuclear Imaging & Therapy Physician · Madera, CA NPI 1013961721 Karen Philp Certified Registered Nurse Anesthetist · Madera, CA NPI 1508812389 Todd Spencer Specialist · Madera, CA NPI 1639102536

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-12-22.