Thomas Williamson, MD

Kelsey-Seybold Medical Group Provider
PointerLanguage(s): English
560 Meyerland Plaza Mall,
Houston,
TX
77096
Joined Kelsey-Seybold: July 2002
Ways to Schedule an Appointment
My Video Profile
My Biography
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Professional Background
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Professional Associations
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Hobbies and Interests
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Awards & Publications
After graduating from Ohio State University in 1997, Dr. Williamson completed his Internal Medicine internship at Ohio State University in 1999. In 2000, he completed his residency in Internal Medicine at The University of Texas Medical School at Houston. After completing his residency, Dr. Williamson was in private practice in the Dallas area for two years prior to moving to Houston. He began working for Kelsey-Seybold on July 29, 2002 at the Kingwood location and practiced there for seven years prior to transferring to the Main Campus in 2009.
Dr. Williamson is a member of the Alpha Omega Alpha Honor Medical Society.
When he’s not caring for his patients, Dr. Williamson enjoys cycling, traveling and reading.
Dr. Williamson has been recognized with a prestigious national certification for excellence in caring for diabetic patients, awarded by the National Committee for Quality Assurance (NCQA). Certification through NCQA’s national Diabetes Recognition Program comes after a comprehensive, individualized review process to verify a physician’s adherence to national standards of excellence in caring for patients diagnosed with diabetes.
In addition, Dr. Williamson has been recognized for providing outstanding cardiovascular and stroke care by the National Committee for Quality Assurance (NCQA) and American Heart Association/American Stroke Association (AHA/ASA) Heart/Stroke Recognition Program. Recognition through the Heart/Stroke Recognition program is achieved as the result of a comprehensive, individualized review process that verifies a physician’s adherence to national standards of excellence in caring for patients with cardiovascular disease or who have had a stroke.
Hospital Affiliations
- Cornerstone - Houston Medical Center
- Kindred - Houston Medical Center
Accepted Insurance
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Humana Plans
Humana
- KelseyCare Humana (learn more)
- Humana Choice POS
- Humana COT National POS Open Access
- Humana EPO PPO Open Access
- Humana National EPO
- Humana HMO Premier (Open Access)
- Humana PPO
- Humana Preferred PPO
- Humana Preferred POS (Open Access)
- Humana/ ChoiceCare Network PPO
- Humana/ChoiceCare+ Network PPO
- Humana National POS- Open Access
- Humana National POS-Open Access Plus
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Blue Cross Blue Shield Plans
Blue Cross Blue Shield
The specific BCBSTX PPO and HMO plans in which Kelsey-Seybold participates are:
- Blue Edge PPO
- Blue Essentials HMO Click here to learn more about selecting a Kelsey Primary Care Physician
- Blue Choice PPO
- Blue Cross Blue Shield of Texas
- Blue Cross Blue Shield Federal Employee Program (Basic and Standard Option)
- Health Select of Texas - ERS
- TRS-ActiveCare Primary Click here to learn more about selecting a Kelsey Primary Care Physician
- TRS-ActiveCare Primary+ Click here to learn more about selecting a Kelsey Primary Care Physician
- TRS-ActiveCare HD
- TRS-ActiveCare 2
- UT SELECT
Kelsey-Seybold will not participate in the following BCBSTX plans: Blue Premier, Blue High-Performance network, Marketplace plans: My Blue Health, and Blue Advantage HMO, or any BCBSTX Medicare products.View FAQ (pdf)
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Cigna Plans
Cigna
- KelseyCare powered by Cigna (learn more)
- Choice Fund PPO
- Choice Fund Open Access Plus (OAP)
- Cigna EPO
- Cigna HMO
- Cigna KelseyCare
- Cigna HMO Open Access (OA)
- Cigna HMO Open Access Plus (OAP)
- Cigna POS
- Cigna PPO
- Cigna Consumer Driven Health Plan (CDHP)
- Cigna Surefit
- LocalPlus
- LocalPlus IN
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UnitedHealthcare Plans
UnitedHealthcare (UHC)
- United Charter Kelsey-Seybold (learn more)
- UnitedHealthcare Charter
- UnitedHealthcare Choice
- UnitedHealthcare Choice Plus
- UnitedHealthcare Core
- UnitedHealthcare Core Plus
- UnitedHealthcare Navigate
- UnitedHealthcare Navigate Plus
- UnitedHealthcare NexusACO
- UnitedHealthcare Options PPO
- UnitedHealthcare Select
- UnitedHealthcare Select Plus
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Aetna Plans
Aetna KelseyCare (learn more)
Aetna PPO, POS, and EPO Plans
Kelsey-Seybold Clinic is an in-network provider for most Aetna PPO, POS, and EPO plans*, including:
- Aetna Select
- Open Access Select
- Elect Choice
- Aetna Open Access Elect Choice
- Aetna Choice POS II
- Managed Choice
- Open Choice PPO
Aetna CVS Health Marketplace Plans
Effective January 1, 2023
- Bronze S
- Silver 1
- Silver 2
- Silver 3
- Silver 4
- Silver S
- Gold
- Gold S
*All Houston area Aetna CVS Health plans are accepted at Kelsey-Seybold Clinic*
*Kelsey-Seybold does not participate in any commercial Aetna HMO and HNO plans, including Aetna QPOS.
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KelseyCare Health Plans
Local employers can add a KelseyCare plan alongside current plan offerings. Over 400 Houston-area employers offer the choice of a KelseyCare plan to their employees.
KelseyCare plans include:
- Aetna KelseyCare (learn more)
- KelseyCare powered by Cigna (learn more)
- KelseyCare Humana (learn more)
- United Charter Kelsey-Seybold (learn more)
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Other Plans
Allied Benefit Systems/NGBS
Federal Employee Health Benefits (FEHB)
- APWU Health Plan Nationwide – CDHP with UnitedHealthcare PPO
- APWU Health Plan Nationwide – High Option with Cigna PPO
- GEHA Benefit Plan Nationwide – High & Standard Options with UnitedHealthcare Choice Plus
- NALC Nationwide with Cigna OAP
- NALC Value Option Nationwide with Cigna OAP
- SAMBA Nationwide – High & Standard with Cigna OAP
- Blue Cross Blue Shield – Standard Option
- Blue Cross Blue Shield – Basic Option
First Health
Great West Healthcare (also known as Cigna-GWH)
- POS
- PPO
- Open Access
HealthSmart PPO
Medicare
Kelsey-Seybold Clinic accepts the following Medicare Advantage Plans: KelseyCare Advantage, Aetna Medicare Advantage, WellCare TexanPlus, Humana Medicare and select UnitedHealthcare plans. Effective January 1, 2009, Kelsey-Seybold Clinic does not accept new patients with traditional Medicare.
MultiPlan PPO
Private Healthcare Systems PPO (PHCS)
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Medicare Advantage Plans