James Ernest Winnick, O.D.
Corneal and Contact Management Optometrist · Oakdale, CA
James Ernest Winnick, O.D. is a corneal and contact management optometrist with a practice address in Oakdale, California, and NPI 1821171000, issued on Oct 23, 2006. Check the license (California 12016, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- James Ernest Winnick
- Credential
- O.D.
- Primary taxonomy
- Corneal and Contact Management Optometrist 152WC0802X
- License numbers
- 12016 CA
12016TLG CA
Self-reported in NPPES; status is on the state search - Practice location
- 141 California Ave, Oakdale, CA 95361
- Phone
- (209) 847-3051
- Enumerated
- Oct 23, 2006
- Record last updated
- Mar 7, 2023
- Fax
- (209) 951-2348
- Medicare enrollment
- Enrolled (PECOS I20081217000018); accepts Medicare assignment
- Medical or professional school
- New York University School Of Medicine, 1997
- Entity
- Type 1 · individual
8 nearest corneal and contact management optometrist records → All 161 in California → Look up another NPI →
Also registered at 141 California Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alma Martinez Torres, O.D.Optometrist1639510852
- Tom Mihok, O.D.Optometrist1952394959
Verify James Ernest Winnick in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 12016Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average corneal and contact management optometrist in 2024
16 Medicare Part D claims, against an average of 225 among the 585 providers of this specialty who prescribed in Part D. Brand-name drugs were 100% of claims.
Most prescribed
- Latanoprost15 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: $18.81
1 payment: food and beverage; the largest payer was Bausch & Lomb Americas Inc. The 610 providers of this specialty with any payment received $1,035.17 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
- James E Winnick OD Professional CorporationOakdale, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James Ernest Winnick among 161 corneal and contact management optometrist records in California
James Ernest Winnick, O.D. is one of 161 corneal and contact management optometrist records with a practice address in California. 62% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 53% newer
- In a Medicare fileYes · 62% of these records are
- In the CMS Doctors and Clinicians fileYes · 32% of these records are
- Graduated1997 · median 2000 among the 52 with a school on file
- Record last updated2023 · 70% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152WC0802X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Corneal and Contact Management Optometrist providers in California
There are 161 corneal and contact management optometrist records in California.
All 161 in California → Every provider in Oakdale → Corneal and Contact Management Optometrist nationwide →
The 8 corneal and contact management optometrist records with the nearest ZIP codes
- Paul Atwal, PAUL ATWAL, O.D.Merced, CA 953401457542540
- L. Elliott, O.D.Escalon, CA 953201023000502
- Jon Fitzpatrick, O.D.Santa Rosa, CA 954031356330278
- Donald WrightSanta Rosa, CA 954071346115383
- Norman Mintz, O.D.Sebastopol, CA 954721609934785
- Paul Domanchuk, O.D.Eureka, CA 955011548223571
- Gary Glenn, ODSan Jose, CA 951231467594572
- John Arvizu, O.D.Gilroy, CA 950201326195538
Common questions
What is James Ernest Winnick, O.D.'s NPI number?
James Ernest Winnick, O.D.'s National Provider Identifier (NPI) is 1821171000, issued on Oct 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James Ernest Winnick, O.D. located?
The NPPES record lists a practice address at 141 California Ave, Oakdale, CA, 95361. Phone: (209) 847-3051. Providers update this record themselves, so call before visiting.
How can I verify James Ernest Winnick, O.D.'s license?
NPPES lists California license number 12016, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does James Ernest Winnick, O.D. prescribe under Medicare Part D?
In 2024, James Ernest Winnick, O.D. had 16 Medicare Part D claims; the average among corneal and contact management optometrist prescribers was 225. 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.