DR. GREGORY SCOTT WINGREN O.D.
NPI 1164857140
Optometrist in Napa, CA

Q: What is Gregory Wingren's NPI number?

The NPI number for Gregory Wingren is 1164857140. It was assigned to this individual provider in the NPPES registry on September 9, 2013.

Q: What is Gregory Wingren's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Q: When was this NPI record last updated?

The NPPES record for Gregory Wingren was last updated on February 24, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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 September 09, 2013PECOS Enrolled

82.92/100

CMS Quality Rating

895 TRANCAS ST, NAPA, CA 94558(707) 252-2020(707) 252-0329 Get Directions Write a Review

NPPES record last updated: February 24, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Gregory Scott Wingren O.d. NPPES

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

DR. GREGORY SCOTT WINGREN O.D. (NPI 1164857140) is an individual optometrist in Napa, California, licensed in California (14767) and active in the NPI registry since September 2013. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1164857140

Entity TypeIndividualMale

Primary Taxonomy152W00000X

Provider Legal NameDR. GREGORY SCOTT WINGRENCredential: O.D.

Location Address895 TRANCAS STNapa, CA 94558-3040

Mailing Address895 Trancas StNapa, CA 94558-3040 · (707) 252-2020 · Fax (707) 252-0329

Phone(707) 252-2020

Fax(707) 252-0329

Sole ProprietorNo

Enumeration DateSeptember 9, 2013

Last NPPES UpdateFebruary 24, 2014

✔ NPI 1164857140 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers

Taxonomy Code152W00000X

License✔ Licensed in CA · 14767

Definition

Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.

895 TRANCAS ST, Napa, CA 94558

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Gregory Scott Wingren O.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Gregory Wingren reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Eye Care Center Of Napa Valley A Medical Corporation

Same address

Ophthalmology

895 TRANCAS ST
Napa, CA 94558

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

NPI 1790781409 (707) 252-2020

Department Of State Hospitals

3.5 mi

Psychiatric Hospital

2100 NAPA VALLEJO HWY
Napa, CA 94558

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

NPI 1326098161 (707) 253-5000

Permanente Medical Group Inc

14 mi

Internal Medicine

975 SERENO DRIVE
Vallejo, CA 94589

Reassigned Medicare billing, California enrollment
20,078 clinicians in this Medicare group

NPI 1336222397 (707) 651-1000

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 2

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.

Established patient complete exam of visual system 92014

An established patient complete exam of the visual system involves a thorough check of your eyes and vision. It assesses eye health, checks for diseases, and measures your ability to see clearly at different distances. It's a routine, non-invasive procedure.

25 services25 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.

23 services23 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94558 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

$145.99 typical visit price

range $65.08 – $192.16

Typical copayment $36.49 (range $16.27 – $48.04)

Most-billed visit code 99204

Established Patient

$80.32 typical visit price

range $21.86 – $157.83

Typical copayment $20.08 (range $5.46 – $39.45)

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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

82.92/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

100

Improvement Activities

Cost

36.61

Other Providers at the Same Location NPPES 9

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

NAPA VALLEY EAR, NOSE AND THROAT, INC.

Otolaryngology

895 TRANCAS ST
NAPA, CA 94558

Napa County (707) 252-0990

JOELLE MARIE ZARZANA O.D.

Optometrist

895 TRANCAS ST
NAPA, CA 94558

Napa County (707) 252-2020

PATRICK RICHARD CASEY OD

Optometrist

895 TRANCAS ST
NAPA, CA 94558

Napa County (707) 252-2020

DR. PAUL KUN ROW M.D.

Ophthalmology

895 TRANCAS ST
NAPA, CA 94558

Napa County (707) 252-2020

DR. DAVID SUNGMIN KIM M.D.

Ophthalmology

895 TRANCAS ST
NAPA, CA 94558

Napa County (707) 252-2020

EYE CARE CENTER OF NAPA VALLEY A MEDICAL CORPORATION

Ophthalmology

895 TRANCAS ST
NAPA, CA 94558

Napa County (707) 252-2020

DR. ALLAN ANTHONY RINGARD DDS

Dentist

895 TRANCAS ST
NAPA, CA 94558

Napa County (707) 224-7666

DR. MICHELLE FESSLER KERR O.D.

Optometrist

895 TRANCAS ST
NAPA, CA 94558

Napa County (707) 252-2020

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 Gregory Wingren's NPI number?

The NPI number for Gregory Wingren is 1164857140. It was assigned to this individual provider in the NPPES registry on September 9, 2013.

Where is Gregory Wingren located?

Gregory Wingren practices at 895 Trancas St, Napa, CA 94558. The listed phone number is (707) 252-2020.

What is Gregory Wingren's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Is Gregory Wingren enrolled in Medicare?

Yes. Gregory Wingren is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Gregory Wingren's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Wingren reassigns Medicare benefits to 3 organizations: Eye Care Center Of Napa Valley A Medical Corporation (Napa, CA), Department Of State Hospitals (Napa, CA) and Permanente Medical Group Inc (Vallejo, 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 Gregory Wingren's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Gregory Wingren was last updated on February 24, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.