John Thomas Gregg, M. D.
Surgery Physician · Alva, OK
John Thomas Gregg, M. D. is a surgery physician with a practice address in Alva, Oklahoma, and NPI 1184605917, issued on Nov 9, 2005. Check the license (Oklahoma 17854, as entered in NPPES) on the Oklahoma Board of Medical Licensure and Supervision; the Medicare figures below come from public CMS files.
- Name
- John Thomas Gregg
- Credential
- M. D.
- Primary taxonomy
- Surgery Physician 208600000X
- License numbers
- 17854 OK
H5890 TX
Self-reported in NPPES; status is on the state search - Practice location
- Share Medical Center, Alva, OK 73717
- Phone
- (806) 346-1468
- Enumerated
- Nov 9, 2005
- Record last updated
- Aug 31, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid IDs
- 100205210A OK
096627702 TX - Medicare enrollment
- Enrolled (PECOS I20051229000730); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 348 in Oklahoma → Look up another NPI →
Verify John Thomas Gregg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOklahoma Board of Medical Licensure and Supervision
Search for license 17854Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% fewer Medicare Part D claims than the average surgery physician in 2024
82 Medicare Part D claims for 55 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D.
Most prescribed
- Azithromycin11 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.
Bills Medicare through one group practice
- Exceptional Physicians Group Ardmore Hospital PLLCArdmore, OK
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Thomas Gregg among 348 surgery physician records in Oklahoma
John Thomas Gregg, M. D. is one of 348 surgery physician records with a practice address in Oklahoma. 71% 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, 89% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 56% of these records are
- Graduated1980 · median 2004 among the 195 with a school on file
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a Oklahoma practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in Oklahoma
There are 348 surgery physician records in Oklahoma.
All 348 in Oklahoma → Every provider in Alva → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Martin Bozeman, M.D.Enid, OK 737011568421253
- Gary Cole, D.O.Enid, OK 737011699084467
- Edwin Cole, M.D.Enid, OK 737011801895776
- John Goulart, DOEnid, OK 737011417957085
- Bret Haines, D.O.Enid, OK 737011629437546
- Mike Nolen, M.D.Enid, OK 737011265498380
- David Shepherd, MDEnid, OK 737011235279746
- Ronald Shreck, M.D.Enid, OK 737011326154394
Common questions
What is John Thomas Gregg, M. D.'s NPI number?
John Thomas Gregg, M. D.'s National Provider Identifier (NPI) is 1184605917, issued on Nov 9, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John Thomas Gregg, M. D. located?
The NPPES record lists a practice address at Share Medical Center, Alva, OK, 73717. Phone: (806) 346-1468. Providers update this record themselves, so call before visiting.
How can I verify John Thomas Gregg, M. D.'s license?
NPPES lists Oklahoma license number 17854, as entered by the provider. Search the Oklahoma Board of Medical Licensure and Supervision at https://www.okmedicalboard.org/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Thomas Gregg, M. D. prescribe under Medicare Part D?
In 2024, John Thomas Gregg, M. D. had 82 Medicare Part D claims for 55 beneficiaries; the average among surgery physician prescribers was 147. 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.