Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mrs. Mary Katherine Horner, PA-C
Physician Assistant in Lewes, DE · enumerated 2016.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1366803645
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Registry record
Entity type Individual (Type 1)
Name Mrs. Mary Katherine Horner
Credential PA-C
Sex Female
Practice address 33672 Bayview Medical Dr Fl 1, Lewes, DE, 19958
Phone (302) 645-2437
Fax (833) 629-0820
Enumeration date Mar 14, 2016
Last updated in NPPES Nov 8, 2024
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License C5-0001050 (DE) Primary
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 103366963001 | Medicaid | PA | - |
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.
Frequently asked questions
Where does Mary Horner practice?
The practice location on file with NPPES is in Lewes, DE. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Mary Horner?
The National Provider Identifier (NPI) for Mary Horner is 1366803645, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-11-08.