NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Brian Hornby, MD

Ophthalmology Physician in Old Saybrook, CT · enumerated 2006 · practices at Eye MD LLC.

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

National Provider Identifier

1881601581

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Registry record

Entity type Individual (Type 1)
Name Dr. John Brian Hornby
Credential MD
Sex Male
Practice address 48 Main St, Old Saybrook, CT, 06475
Phone (860) 388-1251
Fax (860) 388-1253
Enumeration date Aug 2, 2006
Last updated in NPPES Nov 27, 2012

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License CT026165 (CT) 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
026165 Other - CONNECTICARE
001261650 Medicaid CT -
010026165CT01 Other CT ANTHEM BCBS
OV0462 Other CT HEALTH NET

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 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.
What specialty is John Hornby?
John Hornby is registered in NPPES with the primary taxonomy of Ophthalmology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-11-27.