Grant Knowles, OD
Optometrist · Monmouth, OR
Grant Knowles, OD is an optometrist with a practice address in Monmouth, Oregon, and NPI 1710362058, issued on Jul 28, 2015. Check the license (Oregon 3614ATI, as entered in NPPES) with the Oregon board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Grant Knowles
- Credential
- OD
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 3614ATI 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 28, 2015
- Record last updated
- Jul 28, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (503) 837-0313
- Medicare enrollment
- Enrolled (PECOS I20160218000997); accepts Medicare assignment
- Medical or professional school
- Pacific University - College Of Optometry, 2015
- Entity
- Type 1 · individual
8 nearest optometrist records → All 944 in Oregon → Look up another NPI →
Also registered at 405 Boyd LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Garrett Knowles, O.D.Optometrist1790073856
- Roseann Knowles, ODOptometrist1144378233
Verify Grant 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 3614ATICheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% fewer Medicare Part D claims than the average optometrist in 2024
172 Medicare Part D claims for 70 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D. Brand-name drugs were 28% of claims.
Most prescribed
- Latanoprost89 claims
- Prednisolone Acetate20 claims
- Neomycin-Polymyxin-Dexameth18 claims
- Doxycycline Hyclate12 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: $19.26
1 payment: food and beverage; the largest payer was Johnson & Johnson Vision Care, Inc. 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).
Grant Knowles among 944 optometrist records in Oregon
Grant Knowles, OD is one of 944 optometrist records with a practice address in Oregon. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 71% of them.
- NPI issued2015 · 71% of these records are older, 27% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2015 · median 2010 among the 552 with a school on file
- Record last updated2015 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (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 944 in Oregon → Every provider in Monmouth → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Roseann Knowles, ODMonmouth, OR 973611144378233
- Garrett Knowles, O.D.Monmouth, OR 973611790073856
- Dan Hyduchak, O.D.Newport, OR 973651770638082
- Gilbert Le CrenNewport, OR 973651700865961
- Richard Letherer, ODNewport, OR 973651801994215
- Sky Schroeder, O.D.Newport, OR 973651316037864
- Ariene Clark, O.D.Lebanon, OR 973551467603225
- Alyson Harper, ODLincoln City, OR 973671669511861
Common questions
What is Grant Knowles, OD's NPI number?
Grant Knowles, OD's National Provider Identifier (NPI) is 1710362058, issued on Jul 28, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Grant Knowles, OD 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 Grant Knowles, OD's license?
NPPES lists Oregon license number 3614ATI, as entered by the provider. Search the Oregon board that licenses this profession; the NPPES record confirms identity only.
How much does Grant Knowles, OD prescribe under Medicare Part D?
In 2024, Grant Knowles, OD had 172 Medicare Part D claims for 70 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.