Garrett Wayne Knowles, O.D.
Optometrist · Monmouth, OR
Garrett Wayne Knowles, O.D. is an optometrist with a practice address in Monmouth, Oregon, and NPI 1790073856, issued on Jul 11, 2011. Check the license (Oregon 3399AT, as entered in NPPES) with the Oregon board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Garrett Wayne Knowles
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 3399AT OR
Self-reported in NPPES; status is on the state search - Practice location
- 405 Boyd LN, Monmouth, OR 97361
- Phone
- (503) 838-1244
- Enumerated
- Jul 11, 2011
- Record last updated
- Jul 24, 2024
- Fax
- (503) 837-1047
- Medicaid ID
- 500641229 OR
- Medicare enrollment
- Enrolled (PECOS I20111014000323); accepts Medicare assignment
- Medical or professional school
- Pacific University - College Of Optometry, 2011
- Entity
- Type 1 · individual
Also registered at 405 Boyd LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Grant Knowles, ODOptometrist1710362058
- Roseann Knowles, ODOptometrist1144378233
Verify Garrett Wayne Knowles in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Oregon board licenses this profession
Search for license 3399ATCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% more Medicare Part D claims than the average optometrist in 2024
443 Medicare Part D claims for 144 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Latanoprost248 claims
- Prednisolone Acetate42 claims
- Brimonidine Tartrate38 claims
- Neomycin-Polymyxin-Dexameth33 claims
- Dorzolamide-Timolol14 claims
- Timolol Maleate14 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: $71.58
4 payments; by number, the most common kind was food and beverage; the largest payer was Alcon Vision LLC. 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
- Polk Vision Clinics IncDallas, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
3 optometrist records list a practice address in Monmouth
They are 3 of the 62 NPPES records with a practice address in Monmouth, and 944 optometrist records in Oregon.
All 3 in Monmouth → All 944 in Oregon → Every provider in Monmouth →
Other optometrist records in Oregon
- James Adamek, ODEagle Point, OR1568660199
- Brittany Adams, O.D.Albany, OR1265732978
- Makayla Adams, ODMyrtle Creek, OR1790461911
- Shelly Adams, O.D.White City, OR1396908075
- Samuel Adelman, O.D.Happy Valley, OR1043545122
- Brett Agost, O.D.Gresham, OR1326030883
- Dane AgostGresham, OR1376461657
- Andrew Aker, O.D.Portland, OR1154520906
- Joseph An, O.D.Gresham, OR1235271511
- Anna Anderson, O.D.Portland, OR1376707984
Common questions
What is Garrett Wayne Knowles, O.D.'s NPI number?
Garrett Wayne Knowles, O.D.'s National Provider Identifier (NPI) is 1790073856, issued on Jul 11, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Garrett Wayne Knowles, O.D. located?
The NPPES record lists a practice address at 405 Boyd LN, Monmouth, OR, 97361. Phone: (503) 838-1244. Providers update this record themselves, so call before visiting.
How can I verify Garrett Wayne Knowles, O.D.'s license?
NPPES lists Oregon license number 3399AT, as entered by the provider. Search the Oregon board that licenses this profession; the NPPES record confirms identity only.
How much does Garrett Wayne Knowles, O.D. prescribe under Medicare Part D?
In 2024, Garrett Wayne Knowles, O.D. had 443 Medicare Part D claims for 144 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.