Thomas Grischow, O.D.
NPI 1932132818 · Optometrist · Warren, OH
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Grischow, O.D. is a Optometrist provider in Warren, OH (NPI 1932132818).
Provider details
- NPI number
- 1932132818
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- No
- License
- OPT004457 (OH)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,295 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Complete Exam of Visual System92014 | 444 | $121 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 326 | $89 |
| Imaging of Retina92134 | 176 | $39 |
| Imaging of Optic Nerve92133 | 121 | $35 |
| Exam of Visual Field With Extended Testing92083 | 110 | $61 |
| New Patient Complete Exam of Visual System92004 | 72 | $144 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 716 | 234 |
| Timolol Maleate | 221 | 69 |
| Brimonidine Tartrate/Timololbrand: Brimonidine Tartrate-Timolol | 111 | 34 |
| Bimatoprostbrand: Lumigan | 91 | 31 |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 87 | 68 |
| Brimonidine Tartrate | 79 | 28 |
| Brimonidine Tartrate/Timololbrand: Combigan | 51 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$581 across 24 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 1075 W Western Reserve RdPoland, OH 44514-3541Phone: (330) 746-7691
- 10 Dutton DrSuite 200Youngstown, OH 44502-1818Phone: (330) 746-7691Fax: (330) 743-8368
Registry dates
- Enumerated
- 2006-07-07
- Last updated
- 2025-01-14
- Certified
- 2025-01-14
Frequently asked questions
- What is Thomas Grischow's NPI number?
- Thomas Grischow's National Provider Identifier (NPI) is 1932132818, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Grischow's specialty?
- Thomas Grischow is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Thomas Grischow located?
- Thomas Grischow's practice location on file with NPPES is 4060 N River Rd Ne, Warren, OH 44484-1039.
- What is Thomas Grischow's phone number?
- The practice phone number listed in the NPPES registry for Thomas Grischow is (330) 746-7691.
- Does Thomas Grischow accept Medicare?
- Thomas Grischow is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Grischow's NPI active?
- Yes — Thomas Grischow's NPI (1932132818) is active in the NPPES registry as of the last update on 2025-01-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.