Gregory E. Brown, MD
Internal Medicine Physician · San Antonio, TX
Gregory E. Brown, MD is an internal medicine physician with a practice address in San Antonio, Texas, and NPI 1922147933, issued on Feb 6, 2007. Check the license (Texas Q6397, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gregory E. Brown
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- Q6397 TX
Self-reported in NPPES; status is on the state search - Practice location
- 4360 Greco Dr, San Antonio, TX 78222
- Phone
- (210) 648-8200
- Enumerated
- Feb 6, 2007
- Record last updated
- Feb 17, 2025
- Fax
- (855) 392-7988
- Medicare enrollment
- Enrolled (PECOS I20160323002289); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At San Antonio, 2006
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →
Also registered at 4360 Greco Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Thomas Dillon, FNP-BCFamily Nurse Practitioner1114416609
- Kimberly Lasswell, P.A.Medical Physician Assistant1306078886
- Pablo Lozada, M.D.Internal Medicine Physician1285735787
- Patrick Vinyard, MDGeneral Practice Physician1598831281
- James Whitley, FNPFamily Nurse Practitioner1962486852
Verify Gregory E. Brown in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license Q6397Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average internal medicine physician in 2024
145 Medicare Part D claims for 26 beneficiaries, against an average of 3,176 among the 108,855 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.
Bills Medicare through 2 group practices
- Apexmed PLLCSan Antonio, TX
- Apexmed Primary Care ShavanoSan Antonio, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory E. Brown among 9,175 internal medicine physician records in Texas
Gregory E. Brown, MD is one of 9,175 internal medicine physician records with a practice address in Texas. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 41% of them.
- NPI issued2007 · 41% of these records are older, 50% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2006 · median 2004 among the 6,088 with a school on file
- Record last updated2025 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
657 internal medicine physician records list a practice address in San Antonio
They are 657 of the 37,749 NPPES records with a practice address in San Antonio, and 9,175 internal medicine physician records in Texas.
All 9,175 in Texas → Every provider in San Antonio → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Homero Arriola, M.D.San Antonio, TX 782221518097971
- Naaz Khan, MDSan Antonio, TX 782221831346394
- Cheryl King, M.D.San Antonio, TX 782221588693154
- Pablo Lozada, M.D.San Antonio, TX 782221285735787
- Glen McCrelessSan Antonio, TX 782221861439051
- Eleanora Saenz, M.D.San Antonio, TX 782221205801271
- Ninza Sanchez, MDSan Antonio, TX 782221992784078
- Cesar Termulo, M.D.San Antonio, TX 782221194733303
Common questions
What is Gregory E. Brown, MD's NPI number?
Gregory E. Brown, MD's National Provider Identifier (NPI) is 1922147933, issued on Feb 6, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gregory E. Brown, MD located?
The NPPES record lists a practice address at 4360 Greco Dr, San Antonio, TX, 78222. Phone: (210) 648-8200. Providers update this record themselves, so call before visiting.
How can I verify Gregory E. Brown, MD's license?
NPPES lists Texas license number Q6397, as entered by the provider. 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 Gregory E. Brown, MD prescribe under Medicare Part D?
In 2024, Gregory E. Brown, MD had 145 Medicare Part D claims for 26 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.