Courtney Irene Diaz, O.D.
Optometrist · Newark, OH
Courtney Irene Diaz, O.D. is an optometrist with a practice address in Newark, Ohio, and NPI 1760863047, issued on Jun 12, 2015. Check the license (Ohio 6378, as entered in NPPES) with the Ohio board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Courtney Irene Diaz
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 6378 OH
Self-reported in NPPES; status is on the state search - Practice location
- 926 N 21St St, Newark, OH 43055
- Phone
- (740) 366-7341
- Enumerated
- Jun 12, 2015
- Record last updated
- Feb 24, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20150720002825); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest optometrist records → All 2,443 in Ohio → Look up another NPI →
Verify Courtney Irene Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Ohio board licenses this profession
Search for license 6378Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% fewer Medicare Part D claims than the average optometrist in 2024
229 Medicare Part D claims for 56 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 34% of claims.
Most prescribed
- Latanoprost102 claims
- Prednisolone Acetate26 claims
- Brimonidine Tartrate21 claims
- Timolol Maleate19 claims
- Restasis17 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 3 group practices
- Mark D Henry OD IncLancaster, OH
- Primary Vision Care IncNewark, OH
- Primary Vision Care OF Mount Vernon IncMount Vernon, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Courtney Irene Diaz among 2,443 optometrist records in Ohio
Courtney Irene Diaz, O.D. is one of 2,443 optometrist records with a practice address in Ohio. 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 2015, is newer than 73% of them.
- NPI issued2015 · 73% of these records are older, 24% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2015 · median 2006 among the 1,466 with a school on file
- Record last updated2021 · 70% 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 Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Optometrist providers in Ohio
There are 2,443 optometrist records in Ohio.
All 2,443 in Ohio → Every provider in Newark → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Steven Blausey, ODNewark, OH 430551740294198
- Holly Hanbaum, ODNewark, OH 430551225009913
- Bonny Henning, O.D.Newark, OH 430551720086127
- Geral Mesadieu, O.D.Newark, OH 430551902114036
- Jack Neely, ODNewark, OH 430551548232945
- Nicholas Perichak, O.D, M.S.Newark, OH 430551053792424
- Mark Petrykowski, O.D.Newark, OH 430551811955347
- Kathryn Wise, O.D.Newark, OH 430551487797213
Common questions
What is Courtney Irene Diaz, O.D.'s NPI number?
Courtney Irene Diaz, O.D.'s National Provider Identifier (NPI) is 1760863047, issued on Jun 12, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Courtney Irene Diaz, O.D. located?
The NPPES record lists a practice address at 926 N 21St St, Newark, OH, 43055. Phone: (740) 366-7341. Providers update this record themselves, so call before visiting.
How can I verify Courtney Irene Diaz, O.D.'s license?
NPPES lists Ohio license number 6378, as entered by the provider. Search the Ohio board that licenses this profession; the NPPES record confirms identity only.
How much does Courtney Irene Diaz, O.D. prescribe under Medicare Part D?
In 2024, Courtney Irene Diaz, O.D. had 229 Medicare Part D claims for 56 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.