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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Cynthia Diane Martinez, FNP

Family Nurse Practitioner in Mckinney, TX · enumerated 2019 · practices at Heart Rhythm Specialists Pllc.

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

National Provider Identifier

1710545470

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Registry record

Entity type Individual (Type 1)
Name Cynthia Diane Martinez
Credential FNP
Sex Female
Practice address Mckinney, TX, 75070
Phone (972) 372-4505
Enumeration date May 29, 2019
Last updated in NPPES Mar 18, 2026

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AP139387 (TX) Primary
FNP · Family Nurse Practitioner: A nurse practitioner certified in family practice across the lifespan. About the FNP credential

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

What specialty is Cynthia Martinez?
Cynthia Martinez is registered in NPPES with the primary taxonomy of Family Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-03-18.