Mark Alan Williams, O.D.
Optometrist · West Lafayette, IN
Mark Alan Williams, O.D. is an optometrist with a practice address in West Lafayette, Indiana, and NPI 1508947276, issued on Oct 18, 2006. Check the license (Indiana 18003424A, as entered in NPPES) with the Indiana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark Alan Williams
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 18003424A IN
Self-reported in NPPES; status is on the state search - Practice location
- 307 Sagamore Pkwy W, West Lafayette, IN 47906
- Phone
- (765) 463-4558
- Enumerated
- Oct 18, 2006
- Record last updated
- Sep 28, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (765) 497-2154
- Medicare enrollment
- Enrolled (PECOS I20100831000271); may accept Medicare assignment
- Medical or professional school
- Indiana University - School Of Optometry, 2006
- Entity
- Type 1 · individual
8 nearest optometrist records → All 1,578 in Indiana → Look up another NPI →
Also registered at 307 Sagamore Pkwy W
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Monica Markley, PTAPhysical Therapy Assistant1497489470
- Jessica Umholtz, COTAOccupational Therapy Assistant1245888486
Verify Mark Alan Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Indiana board licenses this profession
Search for license 18003424ACheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
66% fewer Medicare Part D claims than the average optometrist in 2024
95 Medicare Part D claims for 23 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 47% of claims.
Most prescribed
- Latanoprost44 claims
- Brimonidine Tartrate14 claims
- Restasis11 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: $209.03
6 payments; by number, the most common kind was food and beverage; the largest payer was CooperVision 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
- Jek Asset Management LLCWest Lafayette, IN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Alan Williams among 1,578 optometrist records in Indiana
Mark Alan Williams, O.D. is one of 1,578 optometrist records with a practice address in Indiana. 73% 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 15% of them.
- NPI issued2006 · 15% of these records are older, 53% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2006 · median 2008 among the 1,014 with a school on file
- Record last updated2020 · 66% 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 Indiana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Optometrist providers in Indiana
There are 1,578 optometrist records in Indiana.
All 1,578 in Indiana → Every provider in West Lafayette → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Steven Beck, O.D.West Lafayette, IN 479061518996891
- Stacey Beck, O.D.West Lafayette, IN 479061053342410
- William Morton, O.D.West Lafayette, IN 479061598749475
- Deanne Aavang, O.D.Lafayette, IN 479051306039268
- Adam Alexander, O.D.Lafayette, IN 479051366828006
- Grace Belangee, ODLafayette, IN 479051891684551
- Karisa Bowman, O.D.Lafayette, IN 479051811340730
- Mary Esders, ODLafayette, IN 479051033560974
Common questions
What is Mark Alan Williams, O.D.'s NPI number?
Mark Alan Williams, O.D.'s National Provider Identifier (NPI) is 1508947276, issued on Oct 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Alan Williams, O.D. located?
The NPPES record lists a practice address at 307 Sagamore Pkwy W, West Lafayette, IN, 47906. Phone: (765) 463-4558. Providers update this record themselves, so call before visiting.
How can I verify Mark Alan Williams, O.D.'s license?
NPPES lists Indiana license number 18003424A, as entered by the provider. Search the Indiana board that licenses this profession; the NPPES record confirms identity only.
How much does Mark Alan Williams, O.D. prescribe under Medicare Part D?
In 2024, Mark Alan Williams, O.D. had 95 Medicare Part D claims for 23 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.