Thomas A. O'Bryan, MD
Infectious Disease Physician · Fort Sam Houston, TX
Thomas A. O'Bryan, MD is an infectious disease physician with a practice address in Fort Sam Houston, Texas, and NPI 1619927019, issued on May 10, 2006. Check the license on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Thomas A. O'Bryan
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- MD042083E PA
Self-reported in NPPES; status is on the state search - Practice location
- Brooke Army Medical Center, Fort Sam Houston, TX 78234
- Phone
- (210) 539-9582
- Enumerated
- May 10, 2006
- Record last updated
- Feb 18, 2022
- Medicaid ID
- 0012960800001 PA
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 674 in Texas → Look up another NPI →
Also registered at Brooke Army Medical Center
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Thomas A. O'Bryan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average infectious disease physician in 2024
16 Medicare Part D claims, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Thomas A. O'Bryan among 674 infectious disease physician records in Texas
Thomas A. O'Bryan, MD is one of 674 infectious disease physician records with a practice address in Texas. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 59% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 76% of these records are
- Record last updated2022 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Texas
There are 674 infectious disease physician records in Texas.
All 674 in Texas → Every provider in Fort Sam Houston → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Kevin Akers, M.D.Jbsa Ft Sam Houston, TX 782341902827934
- Alice Barsoumian, M.D.Fort Sam Houston, TX 782341750542551
- Matthew Dolan, M.D.Fort Sam Houston, TX 782341558386201
- Jessie Glasser, MDFort Sam Houston, TX 782341487744314
- Lynn Horvath, MDFort Sam Houston, TX 782341720065683
- John Kiley, MDJbsa Fort Sam Houston, TX 782341710229166
- David Lindholm, MDJbsa Ft Sam Houston, TX 782341023301918
- Ana Markelz, MDFort Sam Houston, TX 782341427249259
Common questions
What is Thomas A. O'Bryan, MD's NPI number?
Thomas A. O'Bryan, MD's National Provider Identifier (NPI) is 1619927019, issued on May 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas A. O'Bryan, MD located?
The NPPES record lists a practice address at Brooke Army Medical Center, Fort Sam Houston, TX, 78234. Phone: (210) 539-9582. Providers update this record themselves, so call before visiting.
How can I verify Thomas A. O'Bryan, MD's license?
Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas A. O'Bryan, MD prescribe under Medicare Part D?
In 2024, Thomas A. O'Bryan, MD had 16 Medicare Part D claims; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.