John Dale Grizzle, M.D.
Family Medicine Physician · Oklahoma City, OK
John Dale Grizzle, M.D. is a family medicine physician with a practice address in Oklahoma City, Oklahoma, and NPI 1255396073, issued on Apr 18, 2006. Check the license (Oklahoma 20170, as entered in NPPES) on the Oklahoma Board of Medical Licensure and Supervision; the Medicare figures below come from public CMS files.
- Name
- John Dale Grizzle
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 20170 OK
Self-reported in NPPES; status is on the state search - Practice location
- 15800 S Western Ave, Oklahoma City, OK 73170
- Phone
- (405) 793-1300
- Enumerated
- Apr 18, 2006
- Record last updated
- Oct 15, 2025
- Fax
- (405) 805-6611
- Medicaid ID
- 100113130C OK
- Medicare enrollment
- Enrolled (PECOS I20041105000673); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,303 in Oklahoma → Look up another NPI →
Verify John Dale Grizzle 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 20170Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% more Medicare Part D claims than the average family medicine physician in 2024
4,550 Medicare Part D claims for 237 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims. 2,268 claims were for opioids.
Most prescribed
- Oxycodone Hcl879 claims
- Hydrocodone-Acetaminophen725 claims
- Oxycodone-Acetaminophen327 claims
- Tizanidine Hcl177 claims
- Alprazolam157 claims
- Gabapentin146 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.
John Dale Grizzle among 2,303 family medicine physician records in Oklahoma
John Dale Grizzle, M.D. is one of 2,303 family medicine physician records with a practice address in Oklahoma. 79% 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 13% of them.
- NPI issued2006 · 13% of these records are older, 53% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1995 · median 2008 among the 1,407 with a school on file
- Record last updated2025 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Oklahoma practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
478 family medicine physician records list a practice address in Oklahoma City
They are 478 of the 22,359 NPPES records with a practice address in Oklahoma City, and 2,303 family medicine physician records in Oklahoma.
All 2,303 in Oklahoma → Every provider in Oklahoma City → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Peter Chan, DOOklahoma City, OK 731701134160708
- Brent Chandler, DOOklahoma City, OK 731701093793358
- Kevin Conatser, DOOklahoma City, OK 731701669450821
- Bruce Cornett, DOOklahoma City, OK 731701518945757
- Christi Dewitt, PAOklahoma City, OK 731701144261934
- Derrick Freeman, DOOklahoma City, OK 731701982682936
- Keith Layne, D.O.Moore, OK 731701407843212
- Cory Nagode, M.D.Oklahoma City, OK 731701093755803
Common questions
What is John Dale Grizzle, M.D.'s NPI number?
John Dale Grizzle, M.D.'s National Provider Identifier (NPI) is 1255396073, issued on Apr 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Dale Grizzle, M.D. located?
The NPPES record lists a practice address at 15800 S Western Ave, Oklahoma City, OK, 73170. Phone: (405) 793-1300. Providers update this record themselves, so call before visiting.
How can I verify John Dale Grizzle, M.D.'s license?
NPPES lists Oklahoma license number 20170, 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 Dale Grizzle, M.D. prescribe under Medicare Part D?
In 2024, John Dale Grizzle, M.D. had 4,550 Medicare Part D claims for 237 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.