Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William D Hieronimus, PT

Physical Medicine & Rehabilitation Physician in Toledo, OH · enumerated 2007.

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

National Provider Identifier

1942337340

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Registry record

Entity type Individual (Type 1)

Name William D Hieronimus

Credential PT

Sex Male

Practice address 4126 Holland Sylvania Rd, Ste 170, Toledo, OH, 43623

Phone (419) 720-0034

Fax (419) 517-0223

Enumeration date Feb 27, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians · License PT011675 (OH) Primary

PT · Physical Therapist: A licensed movement specialist treating injury and disability through exercise and rehabilitation. About the PT 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

How do I verify William Hieronimus's NPI record?

Cross-check NPI 1942337340 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1942337340 active?

Yes, as of the latest NPPES snapshot, NPI 1942337340 is active (record last updated 2007-07-08).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.