Dr. Gary W. Williamson, MD
- Medicare services, 2020
- 173
- Part D claims, 2024
- 53
- Hospital affiliations
- 1
- Industry payments
- $16
- Medical groups
- 3
- Practice address
- 211 Winnsboro St, Quitman, TX 75783
- Practice phone
- Call (903) 763-6300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
UT Health Quitman
Quitman, Texas
Find Dr. Williamson's professional email, personal email and mobile number
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Dr. Gary W. Williamson is an emergency medicine physician in Quitman, Texas
Dr. Williamson practices at UT Health Quitman in Quitman, Texas.
Dr. Williamson's NPI, 1851333850, was assigned on June 12, 2006. Dr. Williamson graduated from UT Southwestern Medical Center in 1978. Dr. Williamson holds Texas license F2120.
- NPI
- 1851333850NPI Registry (opens in a new tab)
- NPI enumeration date
- June 12, 2006
- NPI status
- Active
- Practice phone
- (903) 763-6300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Gary W. Williamson practices at UT Health Quitman in Quitman, Texas
Dr. Williamson's primary practice is UT Health Quitman, at 211 Winnsboro St, Quitman, TX 75783 in Wood County. The practice phone is (903) 763-6300.
- UT Health Quitman211 Winnsboro St, Quitman, TX 75783 · Wood CountyPhone(903) 763-6300
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gary W. Williamson is affiliated with 2 sites of care and 3 medical groups
Dr. Williamson's primary practice is UT Health Quitman in Quitman, Texas. Dr. Williamson is also affiliated with CHRISTUS Mother Frances Hospital - Tyler. The medical group on file is CHRISTUS Trinity Clinic. Dmand AI also links Dr. Williamson to 2 more medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gary W. 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 |
|---|---|
| UT Health Quitman | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gary W. Williamson is one of 4,831 emergency medicine physicians in Texas
Emergency medicine is Dr. Williamson's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Williamson is board certified in family medicine by the American Board of Family Medicine. Dr. Williamson is licensed in Texas.
Specialties and state licenses
- Emergency medicine, TexasPrimary
Emergency medicine physicians near Dr. Williamson
Counts of emergency medicine physicians 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. Gary W. Williamson billed Medicare for 173 services in 2020
CMS data shows 173 Medicare services from Dr. Williamson across 3 procedure codes in 2020. Medicare paid $14,635 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Williamson's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 3902020: 17356%
Dr. Williamson compared with the Texas median for emergency medicine physicians, 2020
- Dr. Williamson
- Texas median
- Medicare services
- 173vs 22523% below
- Part D claims
- 11vs 7485% below
Medians across 4,588 emergency medicine physicians in Texas with Dmand AI profiles that report each measure.
Dr. Williamson's most billed Medicare procedure codes, 2020
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 emergency medicine physicians in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gary W. Williamson's patients have a median age of 54
Across all payers, Dmand AI patient panel data puts Dr. Williamson's median patient age at 54, with 98% 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 54
Patient panel by sex, all payers
- Women98%
- Men2%
Source: Dmand AI Patient Panel Data
Dr. Gary W. Williamson wrote 53 Medicare Part D claims in 2024
In 2024, Dr. Williamson wrote 53 Medicare Part D claims. 100% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $2,010 in total drug cost. In 2020, CMS named 148 claims across 4 drugs.
Dr. Williamson's most prescribed drugs by claims, 2021
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 1482021: 1193%
Drugs named by CMS: 1 in 2021, 4 in 2020.
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
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Dr. Gary W. Williamson received $16 in industry payments in 2018
CMS Open Payments shows 1 general payment to Dr. Williamson from 1 drug or device company in 2018. Food and beverage make up the largest share, 100% of the total. BTG International, Inc. paid the most, $16.
Companies that paid Dr. Williamson the most, 2018 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gary W. Williamson graduated from UT Southwestern Medical Center
Dr. Williamson graduated from UT Southwestern Medical Center in 1978.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. Gary W. Williamson accepts plans from 20 insurance carriers
Dr. Williamson is in network with 20 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. HMO plans come from the most carriers, 12. Check the plan with the practice before a visit.
- Elevance
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Cigna
- HCSC
- Alliant Health Plans
- Blue Cross Blue Shield of Massachusetts
- +12 more carriersWith a free account
Plan types Dr. Williamson accepts, by number of carriers
- HMO12
- PPO12
- Medicare9
- POS5
- EPO4
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Gary W. 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 DataDmand AI Org Hierarchy 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Gary W. 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. Gary W. Williamson's NPI number?
Dr. Gary W. Williamson's NPI number is 1851333850. It was assigned on June 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gary W. Williamson?
Dr. Gary W. Williamson is an emergency medicine physician in Quitman, Texas. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Gary W. Williamson practice?
Dr. Williamson practices at 211 Winnsboro St, Quitman, TX 75783. Dr. Williamson's primary practice is UT Health Quitman in Quitman, Texas. Dmand AI also links Dr. Williamson to 2 medical groups.
What is Dr. Gary W. Williamson's office phone number?
The practice phone on file for Dr. Williamson is (903) 763-6300.
What is Dr. Gary W. Williamson's medical license number?
Dr. Williamson holds Texas license F2120.
Which hospitals is Dr. Gary W. Williamson affiliated with?
Dr. Williamson is affiliated with CHRISTUS Mother Frances Hospital - Tyler.
What medical group is Dr. Gary W. Williamson part of?
Dr. Williamson is linked to CHRISTUS Trinity Clinic. Dmand AI links Dr. Williamson to 2 more medical groups.
Does Dr. Gary W. Williamson accept Medicare?
Yes. CMS data shows Dr. Williamson billed Medicare for 173 services in 2020.
Is Dr. Gary W. Williamson board certified?
Yes. Dr. Williamson is board certified in family medicine by the American Board of Family Medicine.
What services does Dr. Gary W. Williamson bill to Medicare?
In 2020, Dr. Williamson's most billed Medicare services were emergency department visit (99284), emergency department visit (99283) and emergency department visit (99285).
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Where did Dr. Gary W. Williamson go to medical school?
Dr. Williamson graduated from UT Southwestern Medical Center in 1978.
What drugs does Dr. Gary W. Williamson prescribe most?
In 2021 Medicare Part D data, Dr. Williamson's most prescribed drugs by claims were Shingrix.
Has Dr. Gary W. Williamson received payments from drug or device companies?
CMS Open Payments shows $16 in general payments to Dr. Williamson from 1 company from 2018 to 2018. The largest total came from BTG International, Inc.
How long has Dr. Gary W. Williamson been practicing?
Dr. Williamson graduated from medical school in 1978, 48 years ago.
What insurance does Dr. Gary W. Williamson accept?
Dr. Williamson is in network with 20 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. HMO plans come from the most carriers, 12. Check the plan with the practice before a visit.
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