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ALEXANDRA A HORWITZ M.D.
NPI 1164416855
Pediatrics - Pediatric Allergy/Immunology in Hershey, PA

Active since September 08, 2005PECOS Enrolled
500 UNIVERSITY DR, HERSHEY, PA 17033(800) 243-1455(717) 531-0397 Get Directions Write a Review

NPPES record last updated: July 23, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Alexandra A Horwitz M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ALEXANDRA A HORWITZ M.D. (NPI 1164416855) is an individual pediatric allergy/immunology provider in Hershey, Pennsylvania, licensed in Pennsylvania (MD426965) and active in the NPI registry since September 2005. She is enrolled in Medicare PECOS and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1164416855
Entity TypeIndividualFemale
Primary Taxonomy2080P0201X
Provider Legal NameALEXANDRA A HORWITZCredential: M.D.
Location Address500 UNIVERSITY DRHershey, PA 17033-2360
Mailing AddressPo Box 858, Mc A410Hershey, PA 17033-0858 · (800) 243-1455
Phone(800) 243-1455
Fax(717) 531-0397
Sole ProprietorNo
Enumeration DateSeptember 8, 2005
Last NPPES UpdateJuly 23, 2021
NPPES CertifiedJuly 23, 2021
✔ NPI 1164416855 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric Allergy/ImmunologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0201X
License✔ Licensed in PA · MD426965
Definition
A pediatrician who specializes in the diagnosis and treatment of allergies, allergic reactions, and immunologic diseases in children.
Also ListedAllergy & ImmunologyTaxonomy 207K00000X · License MD426965 (PA)
500 UNIVERSITY DR, Hershey, PA 17033
Open in Google Maps ↗

Secondary Practice Locations 3

Location 1476 Rolling Ridge DrState College, PA 16801-7639 · Phone (800) 243-1455
Location 230 Hope DrHershey, PA 17033-2036 · Phone (800) 243-1455
Location 32221 Noll DrLancaster, PA 17603-7614 · Phone (800) 243-1455

Other Identifiers 1

Medicaid101354444PA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Alexandra A Horwitz M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Alexandra Horwitz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

The Milton S Hershey Medical Center Physicians Group
Same address
Critical Care Medicine
500 UNIVERSITY DR
Hershey, PA 17033
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 2,216 clinicians in this Medicare group
NPI 1073687497 (800) 243-1455

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MR. DANIEL MICHAEL WEISS I PA-C
Physician Assistant
500 UNIVERSITY DR
HERSHEY, PA 17033
Dauphin County (717) 531-7299
NICOLE SWALLOW M.D.
Internal Medicine
500 UNIVERSITY DR, H088
HERSHEY, PA 17033
Dauphin County (717) 531-1692
NEERAV GOYAL M.D.
Otolaryngology
500 UNIVERSITY DR
HERSHEY, PA 17033
Dauphin County (717) 531-8521
KARIMA C FITZGERALD M.D.
Surgery (Trauma Surgery)
500 UNIVERSITY DR
HERSHEY, PA 17033
Dauphin County (717) 531-8887
DR. ANTHONY SIMON BONAVIA M.D.
Anesthesiology (Critical Care Medicine)
500 UNIVERSITY DR, BOX 3951, DAVISON BLDG, TRENT DRIVE
HERSHEY, PA 17033
Dauphin County (717) 531-8521
DR. HIROKO SHIKE MD
Pathology (Clinical Pathology/Laboratory Medicine)
500 UNIVERSITY DR, HERSHEY MEDICAL CENTER
HERSHEY, PA 17033
Dauphin County (717) 531-8615
MARIUM TARIQ M.D.
Family Medicine
500 UNIVERSITY DR
HERSHEY, PA 17033
Dauphin County (717) 531-8521
KANTHI BANGALORE KRISHNA MBBS
Pediatrics (Pediatric Endocrinology)
500 UNIVERSITY DR
HERSHEY, PA 17033
Dauphin County (800) 243-1455

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Alexandra Horwitz's NPI number?

The NPI number for Alexandra Horwitz is 1164416855. It was assigned to this individual provider in the NPPES registry on September 8, 2005.

Where is Alexandra Horwitz located?

Alexandra Horwitz practices at 500 University Dr, Hershey, PA 17033. The listed phone number is (800) 243-1455.

What is Alexandra Horwitz's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Allergy/Immunology, with taxonomy code 2080P0201X.

Is Alexandra Horwitz enrolled in Medicare?

Yes. Alexandra Horwitz is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Alexandra Horwitz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alexandra Horwitz reassigns Medicare benefits to The Milton S Hershey Medical Center Physicians Group (Hershey, PA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Alexandra Horwitz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Alexandra Horwitz was last updated on July 23, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.