DR. JAMES ERNEST WINNICK O.D.
NPI 1821171000
Optometrist - Corneal and Contact Management in Oakdale, CA

Q: What is James Winnick's NPI number?

The NPI number for James Winnick is 1821171000. It was assigned to this individual provider in the NPPES registry on October 23, 2006.

Q: What is James Winnick's specialty?

The primary specialty registered for this NPI is Optometrist, specializing in Corneal and Contact Management, with taxonomy code 152WC0802X.

Q: When was this NPI record last updated?

The NPPES record for James Winnick was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since October 23, 2006PECOS EnrolledAccepts Medicare Assignment

141 CALIFORNIA AVE, OAKDALE, CA 95361(209) 847-3051(209) 951-2348 Get Directions Write a Review

NPPES record last updated: March 7, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 7, 2023, Jul 18, 2019 (2 updates tracked since 2019).

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About Dr. James Ernest Winnick O.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. JAMES ERNEST WINNICK O.D. (NPI 1821171000) is an individual corneal and contact management provider in Oakdale, California, licensed in California (12016) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Stockton, and is a graduate of New York University School Of Medicine (1997).

NPPES Registry Identity

NPI1821171000

Entity TypeIndividualMale

Primary Taxonomy152WC0802X

Provider Legal NameDR. JAMES ERNEST WINNICKCredential: O.D.

Location Address141 CALIFORNIA AVEOakdale, CA 95361

Mailing Address141 California AveOakdale, CA 95361-2946 · (209) 847-3051 · Fax (209) 951-2348

Phone(209) 847-3051

Fax(209) 951-2348

Sole ProprietorNo

Medical School CMSNew York University School Of MedicineGraduated 1997

Enumeration DateOctober 23, 2006

Last NPPES UpdateMarch 7, 20232 updates tracked since enumeration

✔ NPI 1821171000 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometrist · Corneal and Contact ManagementEye and Vision Services Providers

Taxonomy Code152WC0802X

Licenses✔ Licensed in CA · 12016✔ Licensed in CA · 12016TLG

Definition

The professional activities performed by an Optometrist related to the fitting of contact lenses to an eye, ongoing evaluation of the cornea's ability to sustain successful contact lens wear, and treatment of any external eye or corneal condition which can affect contact lens wear.

141 CALIFORNIA AVE, Oakdale, CA 95361

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Secondary Practice Location 1

Location 13133 W March Ln, Suite 2020Stockton, CA 95219-2361 · Phone (209) 951-0820 · Fax (209) 951-2348

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. James Ernest Winnick O.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8527120195

PECOS Enrollment IDI20081217000018

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show James Winnick reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Provider Profile

Same address

Optometrist

141 CALIFORNIA AVE
Oakdale, CA 95361

Reassigned Medicare billing, California enrollment

NPI 1952394959 (209) 847-3051

James E Winnick Od Professional Corporation

Same address

Optometrist

141 CALIFORNIA AVE
Oakdale, CA 95361

Reassigned Medicare billing, California enrollment
2 clinicians in this Medicare group

NPI 1326691437 (209) 847-3051

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Photography of the retina 92250

Photography of the retina, also known as retinal imaging, is a non-invasive procedure that captures images of the back of your eye. This helps doctors identify and monitor conditions like glaucoma, macular degeneration, or diabetic retinopathy. It's painless and quick, often part of a routine eye exam.

31 services31 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

18 services18 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

17 services16 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

16 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95361 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$133.94 typical visit price

range $58.87 – $176.60

Typical copayment $33.48 (range $14.71 – $44.15)

Most-billed visit code 99204

Established Patient

$73.16 typical visit price

range $19.28 – $144.60

Typical copayment $18.29 (range $4.82 – $36.15)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JAMES E WINNICK OD PROFESSIONAL CORPORATION

Optometrist

141 CALIFORNIA AVE
OAKDALE, CA 95361

Stanislaus County (209) 847-3051

DR. ALMA D MARTINEZ TORRES O.D.

Optometrist

141 CALIFORNIA AVE
OAKDALE, CA 95361

Stanislaus County (209) 847-3051

TOM F. MIHOK

Optometrist

141 CALIFORNIA AVE
OAKDALE, CA 95361

Stanislaus County (209) 847-3051

DR. TOM FRANCIS MIHOK O.D.

Optometrist

141 CALIFORNIA AVE
OAKDALE, CA 95361

Stanislaus County (209) 847-3051

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is James Winnick's NPI number?

The NPI number for James Winnick is 1821171000. It was assigned to this individual provider in the NPPES registry on October 23, 2006.

Where is James Winnick located?

James Winnick practices at 141 California Ave, Oakdale, CA 95361. The listed phone number is (209) 847-3051.

What is James Winnick's specialty?

The primary specialty registered for this NPI is Optometrist, specializing in Corneal and Contact Management, with taxonomy code 152WC0802X.

Is James Winnick enrolled in Medicare?

Yes. James Winnick is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for James Winnick's services?

According to the CMS Revalidation Reassignment List (October 2026 release), James Winnick reassigns Medicare benefits to 2 organizations: (Oakdale, CA) and James E Winnick Od Professional Corporation (Oakdale, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for James Winnick's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does James Winnick accept?

Health plans from Providence Health Plan list James Winnick as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for James Winnick was last updated on March 7, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.