Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Heather D Mcelwain, RN

Registered Nurse in Marathon, FL · enumerated 2018.

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

National Provider Identifier

1548746126

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Registry record

Entity type Individual (Type 1)

Name Heather D Mcelwain

Credential RN

Sex Female

Practice address 3000 41st Street Ocean, Marathon, FL, 33050

Phone (305) 766-4660

Enumeration date Jul 17, 2018

Last updated in NPPES Jul 17, 2018

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License R0120409 (OK) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

Other identifiers

Identifier	Type	State	Issuer
P005179711	Other	OK	DRIVERS LICENSE

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 is the NPI number for Heather Mcelwain?

The National Provider Identifier (NPI) for Heather Mcelwain is 1548746126, a Type 1 (individual) record in the CMS NPPES registry.

Where does Heather Mcelwain practice?

The practice location on file with NPPES is in Marathon, FL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-07-17.