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

Theodore Hsu, DO

Physical Medicine & Rehabilitation Physician in Hummelstown, PA · enumerated 2019 · practices at The Milton S Hershey Medical Center Physicians Group.

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

National Provider Identifier

1134689979

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Registry record

Entity type Individual (Type 1)

Name Theodore Hsu

Credential DO

Sex Male

Practice address Hummelstown, PA, 17036

Phone (717) 531-7010

Enumeration date Mar 20, 2019

Last updated in NPPES Sep 27, 2023

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

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians · License OS021013 (PA) Primary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License OT020104 (PA) Secondary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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.

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Frequently asked questions

Is NPI 1134689979 active?

Yes, as of the latest NPPES snapshot, NPI 1134689979 is active (record last updated 2023-09-27).

How do I verify Theodore Hsu's NPI record?

Cross-check NPI 1134689979 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-09-27.