Dr. Thomas J. Williamson, MD
- Medicare services, 2016
- 14
- Part D claims, 2024
- 9,867
- Industry payments
- $16
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 15655 Cypress Woods Medical Dr, Houston, TX 77014
- Practice phone
- Call (713) 442-5669
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
KS SC LLC
Houston, Texas
Find Dr. Williamson's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Thomas J. Williamson is an internist in Houston, Texas
Dr. Williamson practices at KS SC LLC in Houston, Texas.
Dr. Williamson's NPI, 1013003201, was assigned on October 5, 2006. Dr. Williamson graduated from Ohio State College of Medicine in 1997. Dr. Williamson holds Texas license L0701.
- NPI
- 1013003201NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8527963230
- NPI enumeration date
- October 5, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (713) 442-5669
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 55
- Medical school graduation
- 1997
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas J. Williamson practices at KS SC LLC in Houston, Texas
Dr. Williamson's primary practice is KS SC LLC, at 15655 Cypress Woods Medical Dr, Houston, TX 77014 in Harris County. The practice phone is (713) 442-5669.
- KS SC LLC15655 Cypress Woods Medical Dr, Houston, TX 77014 · Harris CountyPhone(713) 442-5669
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Thomas J. Williamson is affiliated with 2 sites of care and 1 medical group
Dr. Williamson's primary practice is KS SC LLC in Houston, Texas. The medical group on file is Kelsey-Seybold Clinic. Dmand AI also links Dr. Williamson to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Thomas J. Williamson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williamson practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| KS SC LLC | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas J. Williamson is one of 8,437 internists in Texas
Internal medicine is Dr. Williamson's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Williamson is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Williamson's licenses on file in 2 states: Texas and Ohio.
Specialties and state licenses
- Internal medicine, TexasPrimary
- Ohio license
Clinical focus
Dmand AI lists chronic hypertension, high cholesterol, lower back pain and underactive thyroid among the conditions Dr. Williamson treats.
Internists near Dr. Williamson
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Thomas J. Williamson billed Medicare for 14 services in 2016
CMS data shows 14 Medicare services from Dr. Williamson across 1 procedure code in 2016, all of them office visits. Medicare paid $474 for them. Every service was in an office.
Dr. Williamson compared with the Texas median for internists, 2016
- Dr. Williamson
- Texas median
- Medicare services
- 14vs 53997% below
- Part D claims
- 9,131vs 28931.6 times
Medians across 7,794 internists in Texas with Dmand AI profiles that report each measure.
Dr. Williamson's most billed Medicare procedure codes, 2016
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Williamson and other internists in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas J. Williamson's patients have a median age of 63
Across all payers, Dmand AI patient panel data puts Dr. Williamson's median patient age at 63, with 47% women.
Dr. Williamson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women47%
- Men52%
Source: Dmand AI Patient Panel Data
Dr. Thomas J. Williamson wrote 9,867 Medicare Part D claims in 2024
In 2024, Dr. Williamson wrote 9,867 Medicare Part D claims for 701 patients. 90% of them were for generic drugs. CMS names the drug for 9,131 of them, across 129 drugs with 11 or more claims each, at $694,251 in total drug cost. In 2023, CMS named 10,871 claims across 147 drugs.
Dr. Williamson's Part D claims by kind of drug, 2024
- Generic8,878 claims90%
- Brand-name951 claims10%
- Other38 claims0%
Dr. Williamson's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Williamson's Part D claims, 2024
- Opioids1%124 of 9,867 claims
- Antibiotics1%111 of 9,867 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 10,8712024: 9,13116%
Drugs named by CMS: 129 in 2024, 147 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Thomas J. Williamson takes part in Medicare
Dr. Williamson accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Thomas J. Williamson received $16 in industry payments in 2024
CMS Open Payments shows 1 general payment to Dr. Williamson from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $16.
Companies that paid Dr. Williamson the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas J. Williamson has 3 awards and honors on record
Dmand AI lists 3 awards for Dr. Williamson, most recently NCQA HSRP in 2014.
Awards and honors for Dr. Williamson
- 2014
- NCQA HSRP
- NCQA PCMH
- NCQA PPC
Source: Dmand AI Professional Profile Data
Dr. Thomas J. Williamson graduated from Ohio State College of Medicine
Dr. Williamson graduated from Ohio State College of Medicine in 1997.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Thomas J. Williamson accepts plans from 7 insurance carriers
Dr. Williamson is in network with 7 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Blue Cross and Blue Shield of Kansas City
- Cigna
- CMS Medicare
- HCSC
Plan types Dr. Williamson accepts, by number of carriers
- PPO5
- HMO3
- Medicare3
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Thomas J. Williamson's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Thomas J. Williamson
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Thomas J. Williamson's NPI number?
Dr. Thomas J. Williamson's NPI number is 1013003201. It was assigned on October 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas J. Williamson?
Dr. Thomas J. Williamson is an internist in Houston, Texas. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Thomas J. Williamson practice?
Dr. Williamson practices at 15655 Cypress Woods Medical Dr, Houston, TX 77014. Dr. Williamson's primary practice is KS SC LLC in Houston, Texas. Dmand AI also links Dr. Williamson to 1 group practice or clinic.
What is Dr. Thomas J. Williamson's office phone number?
The practice phone on file for Dr. Williamson is (713) 442-5669.
What is Dr. Thomas J. Williamson's medical license number?
Dr. Williamson holds Texas license L0701, one of the licenses on file in 2 states.
Which states has Dr. Thomas J. Williamson been licensed in?
Dmand AI has state licenses on file for Dr. Williamson in Texas (2000 to 2027) and Ohio (1998 to 1999).
What medical group is Dr. Thomas J. Williamson part of?
Dr. Williamson is linked to Kelsey-Seybold Clinic.
Does Dr. Thomas J. Williamson accept Medicare?
Yes. CMS data shows Dr. Williamson billed Medicare for 14 services in 2016, and Dr. Williamson accepts Medicare assignment.
Is Dr. Thomas J. Williamson board certified?
Yes. Dr. Williamson is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Thomas J. Williamson bill to Medicare?
In 2016, Dr. Williamson's most billed Medicare services were office visit, established patient (99213).
Show 5 more questionsShow fewer questions
Where did Dr. Thomas J. Williamson go to medical school?
Dr. Williamson graduated from Ohio State College of Medicine in 1997.
What drugs does Dr. Thomas J. Williamson prescribe most?
In 2024 Medicare Part D data, Dr. Williamson's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Levothyroxine Sodium.
Has Dr. Thomas J. Williamson received payments from drug or device companies?
CMS Open Payments shows $16 in general payments to Dr. Williamson from 1 company from 2024 to 2024. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Thomas J. Williamson been practicing?
Dr. Williamson graduated from medical school in 1997, 29 years ago.
What insurance does Dr. Thomas J. Williamson accept?
Dr. Williamson is in network with 7 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 5. Check the plan with the practice before a visit.
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