Gregory J. O'Brien, O.D.
Optometrist · Tahlequah, OK
Gregory J. O'Brien, O.D. is an optometrist with a practice address in Tahlequah, Oklahoma, and NPI 1669635751, issued on Jul 8, 2008. Check the license (Oklahoma 2633, as entered in NPPES) with the Oklahoma board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gregory J. O'Brien
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License numbers
- 2633 OK
2595 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1001 N Grand Ave, Tahlequah, OK 74464
- Phone
- (918) 444-4000
- Enumerated
- Jul 8, 2008
- Record last updated
- Sep 14, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20091030000233); accepts Medicare assignment
- Medical or professional school
- Southern California College Of Optometry, 2007
- Entity
- Type 1 · individual
8 nearest optometrist records → All 892 in Oklahoma → Look up another NPI →
Also registered at 1001 N Grand Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Raul Auza, O.D.Optometrist1134319551
- Madison Bailey, ODOptometrist1467217026
- Rodney Bendure, ODOptometrist1033138037
- Michele Bither-Marshall, ODOptometrist1023038452
- Louis Blowers, ODOptometrist1487144424
- Drew BreedloveStudent in an Organized Health Care Education/Training Program1629823323
Verify Gregory J. O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Oklahoma board licenses this profession
Search for license 2633Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% fewer Medicare Part D claims than the average optometrist in 2024
136 Medicare Part D claims for 31 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 65% of claims.
Most prescribed
- Latanoprost64 claims
- Brimonidine Tartrate30 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
- Taos Picuris Health CenterTaos, NM
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory J. O'Brien among 892 optometrist records in Oklahoma
Gregory J. O'Brien, O.D. is one of 892 optometrist records with a practice address in Oklahoma. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 54% of them.
- NPI issued2008 · 54% of these records are older, 42% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2007 · median 2008 among the 620 with a school on file
- Record last updated2009 · 68% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a Oklahoma practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
72 optometrist records list a practice address in Tahlequah
They are 72 of the 1,190 NPPES records with a practice address in Tahlequah, and 892 optometrist records in Oklahoma.
All 892 in Oklahoma → Every provider in Tahlequah → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Rodney Bendure, ODTahlequah, OK 744641033138037
- Leland Carr, ODTahlequah, OK 744641891786778
- Joe Cope, ODTahlequah, OK 744641760488951
- George Fulk, ODTahlequah, OK 744641508886938
- Lisa Hatfield, O.D.Tahlequah, OK 744641972585545
- James Mahaney, O.D.Tahlequah, OK 744641689621021
- Alan McKee, ODTahlequah, OK 744641326068750
- Earlena McKee, ODTahlequah, OK 744641235159666
Common questions
What is Gregory J. O'Brien, O.D.'s NPI number?
Gregory J. O'Brien, O.D.'s National Provider Identifier (NPI) is 1669635751, issued on Jul 8, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Gregory J. O'Brien, O.D. located?
The NPPES record lists a practice address at 1001 N Grand Ave, Tahlequah, OK, 74464. Phone: (918) 444-4000. Providers update this record themselves, so call before visiting.
How can I verify Gregory J. O'Brien, O.D.'s license?
NPPES lists Oklahoma license number 2633, as entered by the provider. Search the Oklahoma board that licenses this profession; the NPPES record confirms identity only.
How much does Gregory J. O'Brien, O.D. prescribe under Medicare Part D?
In 2024, Gregory J. O'Brien, O.D. had 136 Medicare Part D claims for 31 beneficiaries; the average among optometrist prescribers was 277. 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.