Robert J. Knox, M.D.
Ophthalmology Physician · Portsmouth, OH
Robert J. Knox, M.D. is an ophthalmology physician with a practice address in Portsmouth, Ohio, and NPI 1790782035, issued on Jul 1, 2005. Check the license (Ohio 35-077740, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- Robert J. Knox
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 35-077740 OH
Self-reported in NPPES; status is on the state search - Practice location
- 1534 11TH St, Portsmouth, OH 45662
- Phone
- (740) 355-1161
- Enumerated
- Jul 1, 2005
- Record last updated
- Oct 21, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (740) 355-1191
- Medicaid ID
- 2187351 OH
- Medicare enrollment
- Enrolled (PECOS I20040623000752); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Columbia School Of Medicine, 2000
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 751 in Ohio → Look up another NPI →
Also registered at 1534 11TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- John Evans, M.D.Ophthalmology Physician1386646644
Verify Robert J. Knox in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 35-077740Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
50% fewer Medicare Part D claims than the average ophthalmology physician in 2024
753 Medicare Part D claims for 160 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Latanoprost330 claims
- Dorzolamide-Timolol80 claims
- Brimonidine Tartrate63 claims
- Timolol Maleate34 claims
- Restasis26 claims
- Xiidra26 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.
The MIPS final score for 2023 (Medicare payment program): 82.7 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $131.89
7 payments; by number, the most common kind was food and beverage; the largest payer was Alcon Vision LLC. The 13,221 providers of this specialty with any payment received $4,535.02 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.
Robert J. Knox among 751 ophthalmology physician records in Ohio
Robert J. Knox, M.D. is one of 751 ophthalmology physician records with a practice address in Ohio. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 75% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2000 · median 2002 among the 495 with a school on file
- Record last updated2009 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Ohio
There are 751 ophthalmology physician records in Ohio.
All 751 in Ohio → Every provider in Portsmouth → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Jay Egolf, M.D.Portsmouth, OH 456621225085251
- John Evans, M.D.Portsmouth, OH 456621386646644
- Tyler Bahr, MDGallipolis, OH 456311093461816
- Leslie Patch, M.D.Gallipolis, OH 456311457595399
- Lisa Reaves, M.D.Gallipolis, OH 456311346297058
- Craig Dodrill, MDAthens, OH 457011003803388
- Julie Lew, MDAthens, OH 457011932305273
- Jeffrey McAdoo, MDAthens, OH 457011982690814
Common questions
What is Robert J. Knox, M.D.'s NPI number?
Robert J. Knox, M.D.'s National Provider Identifier (NPI) is 1790782035, issued on Jul 1, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Robert J. Knox, M.D. located?
The NPPES record lists a practice address at 1534 11TH St, Portsmouth, OH, 45662. Phone: (740) 355-1161. Providers update this record themselves, so call before visiting.
How can I verify Robert J. Knox, M.D.'s license?
NPPES lists Ohio license number 35-077740, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robert J. Knox, M.D. prescribe under Medicare Part D?
In 2024, Robert J. Knox, M.D. had 753 Medicare Part D claims for 160 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Robert J. Knox, M.D.'s MIPS final score?
The 2023 MIPS final score is 82.7 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.