Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Heather Nicole Mast, CNS

Q: What is the NPI number for Heather Mast?

The National Provider Identifier (NPI) for Heather Mast is 1033530258, a Type 1 (individual) record in the CMS NPPES registry.

Clinical Nurse Specialist in Round Rock, TX · enumerated 2013 · practices at Texas Diabetes and Endocrinology PA.

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

National Provider Identifier

1033530258

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Registry record

Entity type Individual (Type 1)

Name Heather Nicole Mast

Credential CNS

Sex Female

Practice address 170 Deepwood Dr, Suite 104, Round Rock, TX, 78681

Phone (512) 458-8400

Fax (512) 458-8593

Enumeration date Dec 16, 2013

Last updated in NPPES Dec 16, 2013

Taxonomy & licenses

364S00000X Clinical Nurse Specialist Physician Assistants & Advanced Practice Nursing Providers · License 811792 (TX) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Heather Mast?

The National Provider Identifier (NPI) for Heather Mast is 1033530258, a Type 1 (individual) record in the CMS NPPES registry.

Where does Heather Mast practice?

The practice location on file with NPPES is in Round Rock, TX. 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 2013-12-16.