Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alexandra A Horwitz, M.D.

Pediatric Allergy/Immunology Physician in Hershey, PA · enumerated 2005.

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

National Provider Identifier

1164416855

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Registry record

Entity type Individual (Type 1)

Name Alexandra A Horwitz

Credential M.D.

Sex Female

Practice address 500 University Dr, Hershey, PA, 17033

Phone (800) 243-1455

Fax (717) 531-0397

Enumeration date Sep 8, 2005

Last updated in NPPES Jul 23, 2021

Taxonomy & licenses

207K00000X Allergy & Immunology Physician Allopathic & Osteopathic Physicians · License MD426965 (PA) Secondary

2080P0201X Pediatric Allergy/Immunology Physician Allopathic & Osteopathic Physicians · License MD426965 (PA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
101354444	Medicaid	PA	-

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 Alexandra Horwitz practice?

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

What is the NPI number for Alexandra Horwitz?

The National Provider Identifier (NPI) for Alexandra Horwitz is 1164416855, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Robert Aronoff Cardiovascular Disease Physician · Hershey, PA NPI 1043213226 Hy Depamphilis Internal Medicine Physician · Hershey, PA NPI 1609879691 Elaine Cochran Pediatric Nurse Practitioner · Hershey, PA NPI 1962405100 Joy Cotton Cardiovascular Disease Physician · Hershey, PA NPI 1972506137 Louis Winner Diagnostic Radiology Physician · Hershey, PA NPI 1467455576 Serdar Ural Maternal & Fetal Medicine Physician · Hershey, PA NPI 1912900812 Lisa Mcgregor Pediatric Hematology & Oncology Physician · Hershey, PA NPI 1881697662 John Briguglio Vascular & Interventional Radiology Physician · Hershey, PA NPI 1104829902

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-23.