Thomas Michael Grischow, O.D.
Optometrist · Warren, OH
Thomas Michael Grischow, O.D. is an optometrist with a practice address in Warren, Ohio, and NPI 1932132818, issued on Jul 7, 2006. Check the license (Ohio OPT004457, as entered in NPPES) with the Ohio board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Thomas Michael Grischow
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- OPT004457 OH
Self-reported in NPPES; status is on the state search - Practice location
- 4060 N River RD NE, Warren, OH 44484
- Phone
- (330) 746-7691
- Enumerated
- Jul 7, 2006
- Record last updated
- Jan 14, 2025
- Medicaid ID
- 0958281 OH
- Medicare enrollment
- Enrolled (PECOS I20040726001477); accepts Medicare assignment
- Medical or professional school
- Ohio State University - College Of Optometry, 1993
- Entity
- Type 1 · individual
8 nearest optometrist records → All 2,443 in Ohio → Look up another NPI →
Also registered at 4060 N River RD NE
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Carisa Bohnak, MDOphthalmology Physician1467941575
- Nicholas Lawrence, O.D.Optometrist1538475249
- Taylor Richards, ODOptometrist1114619137
Verify Thomas Michael Grischow in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Ohio board licenses this profession
Search for license OPT004457Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6.1 times the Medicare Part D claims of the average optometrist in 2024
1,680 Medicare Part D claims for 459 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 31% of claims.
Most prescribed
- Latanoprost716 claims
- Timolol Maleate221 claims
- Brimonidine Tartrate-Timolol111 claims
- Lumigan91 claims
- Neomycin-Polymyxin-Dexameth87 claims
- Brimonidine Tartrate79 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $580.74
24 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 34,453 providers of this specialty with any payment received $769.99 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Eye Care Associates, IncYoungstown, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas Michael Grischow among 2,443 optometrist records in Ohio
Thomas Michael Grischow, 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 2006, is newer than 11% of them.
- NPI issued2006 · 11% of these records are older, 54% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1993 · median 2006 among the 1,466 with a school on file
- Record last updated2025 · 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 Warren → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Frank D'Apolito, O.D.Warren, OH 444841801898606
- Carla Darak-Bolino, O.D.Warren, OH 444841467454405
- Chad Douglas, O.D.Warren, OH 444841609858240
- Diana Douglas, O.D.Warren, OH 444841144452459
- Nicholas Lawrence, O.D.Warren, OH 444841538475249
- Taylor Richards, ODWarren, OH 444841114619137
- Thomas Abruzzi, O.D.Warren, OH 444831588669790
- John Barnhart, O.D.Warren, OH 444831407975113
Common questions
What is Thomas Michael Grischow, O.D.'s NPI number?
Thomas Michael Grischow, O.D.'s National Provider Identifier (NPI) is 1932132818, issued on Jul 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Michael Grischow, O.D. located?
The NPPES record lists a practice address at 4060 N River RD NE, Warren, OH, 44484. Phone: (330) 746-7691. Providers update this record themselves, so call before visiting.
How can I verify Thomas Michael Grischow, O.D.'s license?
NPPES lists Ohio license number OPT004457, as entered by the provider. Search the Ohio board that licenses this profession; the NPPES record confirms identity only.
How much does Thomas Michael Grischow, O.D. prescribe under Medicare Part D?
In 2024, Thomas Michael Grischow, O.D. had 1,680 Medicare Part D claims for 459 beneficiaries; the average among optometrist prescribers was 277. Part D covers Medicare prescriptions only.
What is Thomas Michael Grischow, O.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.