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DR. GARRETT WAYNE KNOWLES O.D.
NPI 1790073856
Optometrist in Monmouth, OR

Active since July 11, 2011PECOS EnrolledAccepts Medicare Assignment
405 BOYD LN, MONMOUTH, OR 97361(503) 838-1244(503) 837-1047 Get Directions Write a Review

NPPES record last updated: July 24, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 24, 2024, Dec 12, 2023, Nov 15, 2023 and 1 more (4 updates tracked since 2021).

About Dr. Garrett Wayne Knowles O.d. NPPES

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

DR. GARRETT WAYNE KNOWLES O.D. (NPI 1790073856) is an individual optometrist in Monmouth, Oregon, licensed in Oregon (3399AT) and active in the NPI registry since July 2011. He is enrolled in Medicare PECOS and is a graduate of Pacific University - College Of Optometry (2011).

NPPES Registry Identity

NPI1790073856
Entity TypeIndividualMale
Primary Taxonomy152W00000X
Provider Legal NameDR. GARRETT WAYNE KNOWLESCredential: O.D.
Location Address405 BOYD LNMonmouth, OR 97361-1611
Mailing Address506 Main StDallas, OR 97338 · (503) 623-9233 · Fax (503) 837-1047
Phone(503) 838-1244
Fax(503) 837-1047
Sole ProprietorNo
Medical School CMSPacific University - College Of OptometryGraduated 2011
Enumeration DateJuly 11, 2011
Last NPPES UpdateJuly 24, 20244 updates tracked since enumeration
NPPES CertifiedJuly 24, 2024
✔ NPI 1790073856 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 OR · 3399AT
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.
405 BOYD LN, Monmouth, OR 97361
Open in Google Maps ↗

Other Identifiers 1

Medicaid500641229OR

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, Moda Health Plan, Inc..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. Garrett Wayne Knowles 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 ID6305018409
PECOS Enrollment IDI20111014000323
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 Reassignment

Medicare enrollment records show Garrett Knowles reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Polk Vision Clinics Inc.
7.0 mi
Optometrist
506 MAIN ST
Dallas, OR 97338
  • Reassigned Medicare billing, Oregon enrollment
  • 3 clinicians in this Medicare group
NPI 1760669733 (503) 623-9233

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 6

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 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.
120 services94 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.
49 services43 patients
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.
43 services43 patients
Removal of cataract with insertion of prosthetic lens 66984
This is a procedure where a cloudy lens in your eye, known as a cataract, is removed. After removal, a clear artificial lens is inserted. This helps to restore your vision, enabling you to see clearly again.
17 services14 patients
New patient complete exam of visual system 92004
A new patient complete exam of the visual system is a thorough evaluation of your eyes and vision. It checks for any potential issues and assesses overall eye health. It includes tests for visual acuity, eye movement, and light response.
11 services11 patients
Imaging of retina 92134
Imaging of the retina is a non-invasive procedure that captures detailed images of your eye's interior. This helps detect conditions like macular degeneration or retinal detachment. It's painless and takes only a few minutes.
11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 97361 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
$126.25 typical visit price
range $54.96 – $166.64
Typical copayment $31.56 (range $13.74 – $41.66)
Most-billed visit code 99204
Established Patient
$68.64 typical visit price
range $17.68 – $136.19
Typical copayment $17.16 (range $4.42 – $34.04)
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 2

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

ROSEANN KNOWLES OD
Optometrist
405 BOYD LN
MONMOUTH, OR 97361
Polk County (503) 838-1244
GRANT KNOWLES OD
Optometrist
405 BOYD LN
MONMOUTH, OR 97361
Polk County (503) 838-1244

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 Garrett Knowles's NPI number?

The NPI number for Garrett Knowles is 1790073856. It was assigned to this individual provider in the NPPES registry on July 11, 2011.

Where is Garrett Knowles located?

Garrett Knowles practices at 405 Boyd Ln, Monmouth, OR 97361. The listed phone number is (503) 838-1244.

What is Garrett Knowles's specialty?

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

Is Garrett Knowles enrolled in Medicare?

Yes. Garrett Knowles 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 organization bills Medicare for Garrett Knowles's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Garrett Knowles reassigns Medicare benefits to Polk Vision Clinics Inc. (Dallas, OR). The 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 Garrett Knowles's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Garrett Knowles accept?

Health plans from Anthem Blue Cross and Blue Shield and Moda Health Plan, Inc. list Garrett Knowles 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 Garrett Knowles was last updated on July 24, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.