William Randall Knapp, O.D.
Sports Vision Optometrist · Upper Sandusky, OH
William Randall Knapp, O.D. is a sports vision optometrist with a practice address in Upper Sandusky, Ohio, and NPI 1437131927, issued on Nov 18, 2005. Check the license (Ohio 4759/T1563, as entered in NPPES) with the Ohio board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Randall Knapp
- Credential
- O.D.
- Primary taxonomy
- Sports Vision Optometrist 152WS0006X
- License number
- 4759/T1563 OH
Self-reported in NPPES; status is on the state search - Practice location
- 212 E Wyandot Ave, Upper Sandusky, OH 43351
- Phone
- (419) 294-2421
- Enumerated
- Nov 18, 2005
- Record last updated
- Aug 21, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (419) 294-2499
- Medicaid ID
- 2031661 OH
- Medicare enrollment
- Enrolled (PECOS I20100810000524); accepts Medicare assignment
- Medical or professional school
- Ohio State University - College Of Optometry, 1996
- Entity
- Type 1 · individual
All 1 in Ohio → Look up another NPI →
Also registered at 212 E Wyandot Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kimberley Barnes, O.D.Optometrist1003898925
- Wallace Knapp, O.D.Optometrist1477535383
Verify William Randall Knapp in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Ohio board licenses this profession
Search for license 4759/T1563Check 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 sports vision optometrist in 2024
248 Medicare Part D claims for 89 beneficiaries, against an average of 210 among the 14 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Latanoprost55 claims
- Tobramycin-Dexamethasone46 claims
- Prednisolone Acetate37 claims
- Timolol Maleate27 claims
- Lumigan20 claims
- Levobunolol Hcl12 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.
Sports Vision Optometrist providers in Ohio
There are 1 sports vision optometrist records in Ohio.
All 1 in Ohio → Every provider in Upper Sandusky → Sports Vision Optometrist nationwide →
Common questions
What is William Randall Knapp, O.D.'s NPI number?
William Randall Knapp, O.D.'s National Provider Identifier (NPI) is 1437131927, issued on Nov 18, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William Randall Knapp, O.D. located?
The NPPES record lists a practice address at 212 E Wyandot Ave, Upper Sandusky, OH, 43351. Phone: (419) 294-2421. Providers update this record themselves, so call before visiting.
How can I verify William Randall Knapp, O.D.'s license?
NPPES lists Ohio license number 4759/T1563, as entered by the provider. Search the Ohio board that licenses this profession; the NPPES record confirms identity only.
How much does William Randall Knapp, O.D. prescribe under Medicare Part D?
In 2024, William Randall Knapp, O.D. had 248 Medicare Part D claims for 89 beneficiaries; the average among sports vision optometrist prescribers was 210. 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.