Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

James M. Horner, MD

Pediatric Endocrinology Physician in Toledo, OH · enumerated 2005.

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

National Provider Identifier

1801881602

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Registry record

Entity type Individual (Type 1)

Name James M. Horner

Credential MD

Sex Male

Practice address 2222 Cherry St, Suite 2300, Toledo, OH, 43608

Phone (419) 251-8025

Enumeration date Sep 19, 2005

Last updated in NPPES Jan 25, 2012

Taxonomy & licenses

2080P0205X Pediatric Endocrinology Physician Allopathic & Osteopathic Physicians · License 35043478 (OH) 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
0399242	Medicaid	OH	-
1801881602	Medicaid	MI	-

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

What specialty is James Horner?

James Horner is registered in NPPES with the primary taxonomy of Pediatric Endocrinology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

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Bikram Johar Nephrology Physician · Toledo, OH NPI 1558364679 Ramalingareddy Polamreddy Pediatric Pulmonology Physician · Toledo, OH NPI 1427051168 Patrick Mccormick Neurological Surgery Physician · Toledo, OH NPI 1124021514 James Hennessy Pediatric Cardiology Physician · Toledo, OH NPI 1588666838 Mercy Health - St Vincent Medical Center LLC Children's Hospital · Toledo, OH NPI 1184629115 Stephen Strobel Anatomic Pathology & Clinical Pathology Physician · Toledo, OH NPI 1992701379 Balhinder Brar Nephrology Physician · Toledo, OH NPI 1760489025 Syed Abidi Nephrology Physician · Toledo, OH NPI 1831196195

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-01-25.