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Mrs. Melissa A Callahan, CRNP

Gerontology Nurse Practitioner in Exton, PA · enumerated 2006.

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

National Provider Identifier

1669411393

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Registry record

Entity type Individual (Type 1)
Name Mrs. Melissa A Callahan
Credential CRNP
Sex Female
Practice address 320 Exton Cmns, Exton, PA, 19341
Phone (866) 268-6609
Fax (866) 610-4542
Enumeration date Jun 6, 2006
Last updated in NPPES Feb 26, 2024

Taxonomy & licenses

363LG0600X Gerontology Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License TP006181H (PA) Primary
363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License TP006182C (PA) Secondary

Other identifiers

Identifier Type State Issuer
102510472 0001 Other PA PROMISE NUMBER
032688YCCW Other PA MEDICARE NUMBER

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

Where does Melissa Callahan practice?
The practice location on file with NPPES is in Exton, PA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Melissa Callahan?
The National Provider Identifier (NPI) for Melissa Callahan is 1669411393, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-02-26.