NPI Portal NPI Lookup & Verification

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

Dr. Margaret Hubbell, MD, PHD

Cornea and External Diseases Specialist Physician in Texarkana, TX · enumerated 2016.

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

National Provider Identifier

1821452681

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Registry record

Entity type Individual (Type 1)
Name Dr. Margaret Hubbell
Credential MD, PHD
Sex Female
Practice address Texarkana, TX, 75503
Phone (903) 614-3937
Fax (903) 614-3525
Enumeration date Apr 7, 2016
Last updated in NPPES Aug 14, 2023

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

Taxonomy & licenses

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 1699812719 (OR) Secondary
207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License U5986 (TX) Secondary
390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
207WX0120X Cornea and External Diseases Specialist Physician Allopathic & Osteopathic Physicians · License U5986 (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
MD197993 Other OR OREGON MEDICAL BOARD 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

Where does Margaret Hubbell practice?
The practice location on file with NPPES is in Texarkana, TX. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Margaret Hubbell?
The National Provider Identifier (NPI) for Margaret Hubbell is 1821452681, 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 2023-08-14.