John Gregg, M. D.
Emergency Medicine Physician · Alva, OK
John Gregg, M. D. is an emergency medicine 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 Gregg
- Credential
- M. D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- 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
- Entity
- Type 1 · individual
Verify John 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
77% fewer Medicare Part D claims than the average emergency medicine physician in 2024
82 Medicare Part D claims for 55 beneficiaries, against an average of 355 among the 49,029 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.
One hospital or facility affiliation
- Exceptional Physicians Group Ardmore Hospital PLLCArdmore, OK
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Emergency Medicine Physician providers in Oklahoma
There are 703 emergency medicine physician records in Oklahoma.
Other emergency medicine physician records in Oklahoma
- David Abercrombie, MDOklahoma City, OK1023135506
- Bobby Abernathy, D.O.Tulsa, OK1114289659
- Tyler Adams, D.O.Lawton, OK1538542170
- Tolulope Adepoju, MDNorman, OK1891425054
- Tinuola AgbabiakaOklahoma City, OK1790097459
- Kelechi Agu, MDTulsa, OK1831686526
- Azeemuddin Ahmed, MDOklahoma City, OK1609850148
- Noor Ahmed, DOTulsa, OK1679102446
- Sarfraz AhmedEdmond, OK1811374770
- David AlexanderOklahoma City, OK1003418559
Common questions
What is John Gregg, M. D.'s NPI number?
John 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 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 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 Gregg, M. D. prescribe under Medicare Part D?
In 2024, John Gregg, M. D. had 82 Medicare Part D claims for 55 beneficiaries; the average among emergency medicine physician prescribers was 355. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.