Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Stefanie Lynn Addington, M.D.

Internal Medicine Physician in Frisco, TX · enumerated 2006.

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

National Provider Identifier

1639197759

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Registry record

Entity type Individual (Type 1)

Name Stefanie Lynn Addington

Credential M.D.

Sex Female

Practice address 8350 Dallas Pkwy Ste 300, Frisco, TX, 75034

Phone (972) 468-9999

Fax (972) 981-3600

Enumeration date Jul 17, 2006

Last updated in NPPES Feb 22, 2023

Taxonomy & licenses

207RE0101X Endocrinology, Diabetes & Metabolism Physician Allopathic & Osteopathic Physicians · License L8255 (TX) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License L8255 (TX) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
166136503	Medicaid	TX	-

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

Where does Stefanie Addington practice?

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

What is the NPI number for Stefanie Addington?

The National Provider Identifier (NPI) for Stefanie Addington is 1639197759, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-02-22.