Aaron R. Gruber, O.D.
Optometrist · Appleton, WI
Aaron R. Gruber, O.D. is an optometrist with a practice address in Appleton, Wisconsin, and NPI 1548558869, issued on Jul 20, 2011. Check the license (Wisconsin 3238-35, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Aaron R. Gruber
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 3238-35 WI
Self-reported in NPPES; status is on the state search - Practice location
- 712 N Casaloma Dr, Appleton, WI 54913
- Phone
- (920) 832-1202
- Enumerated
- Jul 20, 2011
- Record last updated
- Jul 20, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (920) 832-1229
- Medicare enrollment
- Enrolled (PECOS I20111031000555); accepts Medicare assignment
- Entity
- Type 1 · individual
Verify Aaron R. Gruber in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 3238-35Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
18% more Medicare Part D claims than the average optometrist in 2024
327 Medicare Part D claims for 70 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Latanoprost155 claims
- Timolol Maleate82 claims
- Brimonidine Tartrate20 claims
- Ketorolac Tromethamine12 claims
- Xiidra11 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.
Industry payments in 2024: $52.64
2 payments; by number, the most common kind was food and beverage; the largest payer was Tarsus Pharmaceuticals, 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 Center OF New Holstein LLCGrafton, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
43 optometrist records list a practice address in Appleton
They are 43 of the 3,249 NPPES records with a practice address in Appleton, and 1,161 optometrist records in Wisconsin.
All 43 in Appleton → All 1,161 in Wisconsin → Every provider in Appleton →
Other optometrist records in Wisconsin
- Katie Abata, O.D.Appleton, WI1043646623
- Brianna Adams, ODStoughton, WI1093605222
- Gerald Adams, ODWestby, WI1760479182
- James AdamsPortage, WI1154007953
- Lawrence Addison, O.D.Weston, WI1760794697
- Farzana AkterWaupun, WI1346821725
- Margarette Elaine Alcesto, ODShorewood, WI1669984563
- Robert Alexejun, O.D.Wausau, WI1235275009
- Carmen Alfonso-Kneiert, ODFort Atkinson, WI1710938634
- Jennifer Alvarez, O.D.Brookfield, WI1316255805
Common questions
What is Aaron R. Gruber, O.D.'s NPI number?
Aaron R. Gruber, O.D.'s National Provider Identifier (NPI) is 1548558869, issued on Jul 20, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Aaron R. Gruber, O.D. located?
The NPPES record lists a practice address at 712 N Casaloma Dr, Appleton, WI, 54913. Phone: (920) 832-1202. Providers update this record themselves, so call before visiting.
How can I verify Aaron R. Gruber, O.D.'s license?
NPPES lists Wisconsin license number 3238-35, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Aaron R. Gruber, O.D. prescribe under Medicare Part D?
In 2024, Aaron R. Gruber, O.D. had 327 Medicare Part D claims for 70 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.