Johnasan M. Gregory, M.D.
Gastroenterology Physician · Sherman, TX
Johnasan M. Gregory, M.D. is a gastroenterology physician with a practice address in Sherman, Texas, and NPI 1699774869, issued on Jul 19, 2005. Check the license (Texas G8150, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Johnasan M. Gregory
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- G8150 TX
Self-reported in NPPES; status is on the state search - Practice location
- 300 N Highland Ave Ste 340, Sherman, TX 75092
- Phone
- (903) 957-0233
- Enumerated
- Jul 19, 2005
- Record last updated
- Apr 16, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (903) 957-0263
- Medicaid ID
- 126499603 TX
- Medicare enrollment
- Enrolled (PECOS I20240105003185); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,478 in Texas → Look up another NPI →
Verify Johnasan M. Gregory in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license G8150Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% fewer Medicare Part D claims than the average gastroenterology physician in 2024
296 Medicare Part D claims for 54 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Pantoprazole Sodium29 claims
- Metformin Hcl16 claims
- Levothyroxine Sodium15 claims
- Atorvastatin Calcium13 claims
- Meloxicam13 claims
- Alendronate Sodium12 claims
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.
Industry payments in 2024: $167.25
7 payments; by number, the most common kind was food and beverage; the largest payer was Regeneron Healthcare Solutions, Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Conway Regional Medical Center IncConway, AR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Johnasan M. Gregory among 1,478 gastroenterology physician records in Texas
Johnasan M. Gregory, M.D. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated1984 · median 2003 among the 1,175 with a school on file
- Record last updated2012 · 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 Sherman → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Jermaine Clarke, DOSherman, TX 750921841498094
- Martin Farrell, M.D.Sherman, TX 750921295814036
- Joseph Kim, M.D.Sherman, TX 750921174765622
- Glenn Young, M.D.Sherman, TX 750921518046341
- Sindhu Abraham, M.D.Plano, TX 750931033178223
- Adnan Badr, M.D.Plano, TX 750931770552945
- Kenneth Brown, M.D.Plano, TX 750931043279870
- Son Do, M.D.Plano, TX 750931871552224
Common questions
What is Johnasan M. Gregory, M.D.'s NPI number?
Johnasan M. Gregory, M.D.'s National Provider Identifier (NPI) is 1699774869, issued on Jul 19, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Johnasan M. Gregory, M.D. located?
The NPPES record lists a practice address at 300 N Highland Ave Ste 340, Sherman, TX, 75092. Phone: (903) 957-0233. Providers update this record themselves, so call before visiting.
How can I verify Johnasan M. Gregory, M.D.'s license?
NPPES lists Texas license number G8150, 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 Johnasan M. Gregory, M.D. prescribe under Medicare Part D?
In 2024, Johnasan M. Gregory, M.D. had 296 Medicare Part D claims for 54 beneficiaries; 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.