Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Katherine A Horner, CRNP

Registered Nurse in Frederick, MD · enumerated 2005.

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

National Provider Identifier

1144205071

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Registry record

Entity type Individual (Type 1)

Name Katherine A Horner

Credential CRNP

Sex Female

Practice address 61 Thomas Johnson Dr, Frederick, MD, 21702

Phone (301) 663-6171

Fax (301) 695-4469

Enumeration date Dec 14, 2005

Last updated in NPPES Oct 17, 2011

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License R106852 (MD) Primary

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 Katherine Horner?

Katherine Horner is registered in NPPES with the primary taxonomy of Registered Nurse. 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 2011-10-17.