Dr. John Mathis Barnett, MD
- Medicare services, 2020
- 12,833
- Part D claims, 2020
- 129
- Industry payments
- $447
- Affiliated sites
- 2
- Medical group
- 1
- 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. Barnett'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. John Mathis Barnett is a radiation oncologist in Quitman, Texas
Dr. Barnett practices at UT Health Quitman in Quitman, Texas.
Dr. Barnett's NPI, 1538177217, was assigned on August 4, 2006. Dr. Barnett graduated from UTMB Health in 1975. Dr. Barnett holds Texas license E4190.
- NPI
- 1538177217NPI Registry (opens in a new tab)
- NPI enumeration date
- August 4, 2006
- NPI status
- Active
- Practice phone
- (903) 763-6300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1975
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. John Mathis Barnett practices at UT Health Quitman in Quitman, Texas
Dr. Barnett'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. John Mathis Barnett is affiliated with 3 sites of care and 1 medical group
Dr. Barnett's primary practice is UT Health Quitman in Quitman, Texas. Dmand AI also links Dr. Barnett to 1 physician office, 1 group practice or clinic and 1 medical group, each 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. John Mathis Barnett's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Barnett practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UT Health Quitman | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John Mathis Barnett is one of 401 radiation oncologists in Texas
Radiation oncology is Dr. Barnett's primary specialty in the NPI Registry, under taxonomy code 2085R0001X. Dr. Barnett is board certified in therapeutic radiology by the American Board of Radiology. Dmand AI has Dr. Barnett's licenses on file in 3 states: Texas, New Mexico and Alabama.
Specialties and state licenses
- Radiation oncology, TexasPrimary
- New Mexico license
- Alabama license
Radiation oncologists near Dr. Barnett
Counts of radiation oncologists 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. John Mathis Barnett billed Medicare for 12,833 services in 2020
CMS data shows 12,833 Medicare services from Dr. Barnett across 11 procedure codes in 2020. Medicare paid $162,127 for them.
Dr. Barnett's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Other services
- 2019: 14,5362020: 11,99417%
- Imaging
- 2019: 2,9962020: 38287%
- Surgery
- 2019: 6922020: 24764%
- Lab and pathology
- 2019: 1002020: 11111%
- Office and hospital visits
- 2019: 4912020: 9980%
Where Dr. Barnett's Medicare services took place, 2020
- In an office12,821100%
- In a facility120%
Dr. Barnett compared with the Texas median for radiation oncologists, 2020
- Dr. Barnett
- Texas median
- Medicare services
- 12,833vs 1,4728.7 times
- Part D claims
- 129vs 413.1 times
Medians across 370 radiation oncologists in Texas with Dmand AI profiles that report each measure.
Dr. Barnett'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.
Need commercial claims for Dr. Barnett?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Barnett and other radiation oncologists in Texas.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Mathis Barnett wrote 129 Medicare Part D claims in 2020
In 2020, Dr. Barnett wrote 129 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $1,738 in total drug cost. In 2019, CMS named 377 claims across 6 drugs.
Dr. Barnett's most prescribed drugs by claims, 2020
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, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 3772020: 12966%
Drugs named by CMS: 1 in 2020, 6 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. John Mathis Barnett received $447 in industry payments from 2016 to 2025
CMS Open Payments shows 18 general payments to Dr. Barnett from 9 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $135.
General payments to Dr. Barnett by program year, 2016 to 2025
Companies that paid Dr. Barnett the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Mathis Barnett graduated from UTMB Health
Dr. Barnett graduated from UTMB Health in 1975.
- Medical school
- Board certified in therapeutic radiology
Source: Dmand AI Professional Profile Data
Dr. John Mathis Barnett accepts plans from 2 insurance carriers
Dr. Barnett is in network with 2 carriers, including Cigna and Blue Cross Blue Shield of Michigan. HMO plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Cigna
- Blue Cross Blue Shield of Michigan
Plan types Dr. Barnett accepts, by number of carriers
- HMO2
- Medicare1
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. John Mathis Barnett'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 |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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. John Mathis Barnett
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. John Mathis Barnett's NPI number?
Dr. John Mathis Barnett's NPI number is 1538177217. It was assigned on August 4, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Mathis Barnett?
Dr. John Mathis Barnett is a radiation oncologist in Quitman, Texas. The primary specialty in the NPI Registry is Radiation Oncology Physician (taxonomy code 2085R0001X).
Where does Dr. John Mathis Barnett practice?
Dr. Barnett practices at 211 Winnsboro St, Quitman, TX 75783. Dr. Barnett's primary practice is UT Health Quitman in Quitman, Texas. Dmand AI also links Dr. Barnett to 1 physician office, 1 group practice or clinic and 1 medical group.
What is Dr. John Mathis Barnett's office phone number?
The practice phone on file for Dr. Barnett is (903) 763-6300.
What is Dr. John Mathis Barnett's medical license number?
Dr. Barnett holds Texas license E4190, one of the licenses on file in 3 states.
Which states has Dr. John Mathis Barnett been licensed in?
Dmand AI has state licenses on file for Dr. Barnett in Texas (1975 to 2026), New Mexico (2008 to 2012) and Alabama (1977 to 2001).
Does Dr. John Mathis Barnett accept Medicare?
Yes. CMS data shows Dr. Barnett billed Medicare for 12,833 services in 2020.
Is Dr. John Mathis Barnett board certified?
Yes. Dr. Barnett is board certified in therapeutic radiology by the American Board of Radiology.
What services does Dr. John Mathis Barnett bill to Medicare?
In 2020, Dr. Barnett's most billed Medicare services were medicare temporary code (Q9967), medicare service (G6002) and medicare service (G6015).
Where did Dr. John Mathis Barnett go to medical school?
Dr. Barnett graduated from UTMB Health in 1975.
Show 4 more questionsShow fewer questions
What drugs does Dr. John Mathis Barnett prescribe most?
In 2020 Medicare Part D data, Dr. Barnett's most prescribed drugs by claims were Tamsulosin HCl.
Has Dr. John Mathis Barnett received payments from drug or device companies?
CMS Open Payments shows $447 in general payments to Dr. Barnett from 9 companies from 2016 to 2025. The largest total came from Abbvie Inc.
How long has Dr. John Mathis Barnett been practicing?
Dr. Barnett graduated from medical school in 1975, 51 years ago.
What insurance does Dr. John Mathis Barnett accept?
Dr. Barnett is in network with 2 carriers, including Cigna and Blue Cross Blue Shield of Michigan. HMO plans come from the most carriers, 2. Check the plan with the practice before a visit.
Selling to radiation oncology practices?
See radiation oncologists in Texas by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card