John Robert Mathias, MD
Gastroenterology Physician · Houston, TX
John Robert Mathias, MD is a gastroenterology physician with a practice address in Houston, Texas, and NPI 1639239643, issued on Dec 11, 2006. Check the license (Texas H5378, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- John Robert Mathias
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- H5378 TX
Self-reported in NPPES; status is on the state search - Practice location
- 7501 Fannin Ste 705, Houston, TX 77054
- Phone
- (713) 795-4843
- Enumerated
- Dec 11, 2006
- Record last updated
- Mar 19, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (713) 795-4839
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,478 in Texas → Look up another NPI →
Verify John Robert Mathias in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license H5378Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average gastroenterology physician in 2024
36 Medicare Part D claims, against an average of 811 among the 16,445 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.
John Robert Mathias among 1,478 gastroenterology physician records in Texas
John Robert Mathias, MD is one of 1,478 gastroenterology physician records with a practice address in Texas. 89% 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 14% of them.
- NPI issued2006 · 14% of these records are older, 51% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileNo · 79% of these records are
- Record last updated2008 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Texas
There are 1,478 gastroenterology physician records in Texas.
All 1,478 in Texas → Every provider in Houston → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Marc Catalano, MDHouston, TX 770541952378317
- Ahmad Farooq, MDHouston, TX 770541114269305
- Pedro Arguello, M.D.Houston, TX 770551508876939
- Ernst DorschHouston, TX 770551578530176
- David Nemoto, M.D.Houston, TX 770551528240686
- Mohammade Zafarnia, M.D.Houston, TX 770551023039989
- Daniel Zhang, M.DHouston, TX 770551306264130
- Craig Johnson, M.D.Houston, TX 770561629163571
Common questions
What is John Robert Mathias, MD's NPI number?
John Robert Mathias, MD's National Provider Identifier (NPI) is 1639239643, issued on Dec 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Robert Mathias, MD located?
The NPPES record lists a practice address at 7501 Fannin Ste 705, Houston, TX, 77054. Phone: (713) 795-4843. Providers update this record themselves, so call before visiting.
How can I verify John Robert Mathias, MD's license?
NPPES lists Texas license number H5378, 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 John Robert Mathias, MD prescribe under Medicare Part D?
In 2024, John Robert Mathias, MD had 36 Medicare Part D claims; the average among gastroenterology physician prescribers was 811. 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.