Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Thomas J Williamson, MD

Individual provider Internal Medicine Physician · NPI 1013003201

Thomas J Williamson, MD is an Internal Medicine in Houston, Texas. Graduated from Ohio State University College of Medicine in 1997, 29 years ago. Practices with Kelsey-Seybold Medical Group, PLLC, a 942-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
29
Trained at
Ohio State University College of Medicine
Licensed in
TX
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

560 Meyerland Plaza Mall
Houston, TX 77096-1615
Phone: (713) 442-3222
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence L0701 (TX)

Record details

NPI number1013003201
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 5, 2006
Last updated in NPPESJune 23, 2021
Certification dateJune 23, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOHIO STATE UNIVERSITY COLLEGE OF MEDICINE
Graduated 1997 (29 years in practice)
Group practice Kelsey-Seybold Medical Group, Pllc — 942 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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