Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Gregory J O'Brien, OD

Individual provider Optometrist · NPI 1669635751

Gregory J O'Brien, OD is registered under Optometry in Tahlequah, Oklahoma. Graduated from Southern California College of Optometry in 2007, 19 years ago. Practices with Taos Picuris Health Center, an 8-clinician group and accepts Medicare assignment. Licensed in Colorado and Oklahoma.

Years since qualifying
19
Trained at
Southern California College of Optometry
Licensed in
CO, OK
In the registry since
2008
Specialties on file
2
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

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Practice location Address checks out

1001 N Grand Ave
Tahlequah, OK 74464-7017 Not confirmed with CMS for 17 years — call before visiting
Phone: (918) 444-4000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence 2633 (OK)
Optometrist Taxonomy 152W00000X · Licence 2595 (CO)

Record details

NPI number1669635751
Entity typeIndividual (Type 1)
GenderMale
Credentials OD
Sole proprietorYes
NPI enumeratedJuly 8, 2008
Last updated in NPPESSeptember 14, 2009

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPTOMETRY
Medical schoolSOUTHERN CALIFORNIA COLLEGE OF OPTOMETRY
Graduated 2007 (19 years in practice)
Group practice Taos Picuris Health Center — 8 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients40
Services billed 113 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Taos Picuris Health Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 8 clinicians in the practice; 5 are shown here.

Other providers in Tahlequah