Gwenda Renee' Gnadt, O.D., M.P.H.
Optometrist · Nesconset, NY
Gwenda Renee' Gnadt, O.D., M.P.H. is an optometrist with a practice address in Nesconset, New York, and NPI 1689676728, issued on Jun 1, 2005. Check the license (New York V5220, as entered in NPPES) with the New York board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Gwenda Renee' Gnadt
- Credential
- O.D., M.P.H.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- V5220 NY
Self-reported in NPPES; status is on the state search - Practice location
- 271 Smithtown Blvd, Nesconset, NY 11767
- Phone
- (631) 588-5100
- Enumerated
- Jun 1, 2005
- Record last updated
- Dec 5, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (631) 588-5185
- Medicare enrollment
- Enrolled (PECOS I20110127000339); accepts Medicare assignment
- Medical or professional school
- University Alabama Birmingham - School Of Optometry, 1991
- Entity
- Type 1 · individual
8 nearest optometrist records → All 3,535 in New York → Look up another NPI →
Also registered at 271 Smithtown Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bradley Meltzer, O.D.Vision Therapy Optometrist1558363861
Verify Gwenda Renee' Gnadt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license V5220Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% fewer Medicare Part D claims than the average optometrist in 2024
131 Medicare Part D claims for 44 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 43% of claims.
Most prescribed
- Latanoprost35 claims
- Restasis20 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: $696.86
8 payments; by number, the most common kind was food and beverage; the largest payer was Bausch & Lomb Americas 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 Vision Associates LLPNesconset, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gwenda Renee' Gnadt among 3,535 optometrist records in New York
Gwenda Renee' Gnadt, O.D., M.P.H. is one of 3,535 optometrist records with a practice address in New York. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 47% of these records are
- Graduated1991 · median 2008 among the 1,667 with a school on file
- Record last updated2018 · 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 New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
3 optometrist records list a practice address in Nesconset
They are 3 of the 239 NPPES records with a practice address in Nesconset, and 3,535 optometrist records in New York.
All 3,535 in New York → Every provider in Nesconset → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Robert Rudman, O.D.Nesconset, NY 117671821253964
- Laura Sinski, O.D.Nesconset, NY 117671770726598
- Asma Alizai, O.D.Northport, NY 117681861741035
- Candice Distefano, ODNorthport, NY 117681235618620
- Lynn Finnegan, O.D.Northport, NY 117681679579189
- Pamela Krieger, LDOMount Sinai, NY 117661992886287
- Daniel Levy, ODNorthport, NY 117681851355507
- Ellvin Mar, O.D.Northport, NY 117681790965101
Common questions
What is Gwenda Renee' Gnadt, O.D., M.P.H.'s NPI number?
Gwenda Renee' Gnadt, O.D., M.P.H.'s National Provider Identifier (NPI) is 1689676728, issued on Jun 1, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gwenda Renee' Gnadt, O.D., M.P.H. located?
The NPPES record lists a practice address at 271 Smithtown Blvd, Nesconset, NY, 11767. Phone: (631) 588-5100. Providers update this record themselves, so call before visiting.
How can I verify Gwenda Renee' Gnadt, O.D., M.P.H.'s license?
NPPES lists New York license number V5220, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
How much does Gwenda Renee' Gnadt, O.D., M.P.H. prescribe under Medicare Part D?
In 2024, Gwenda Renee' Gnadt, O.D., M.P.H. had 131 Medicare Part D claims for 44 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.