Nathalie Rioux, M.D.
Glaucoma Specialist (Ophthalmology) Physician · Greenfield, MA
Nathalie Rioux, M.D. is a glaucoma specialist (ophthalmology) physician with a practice address in Greenfield, Massachusetts, and NPI 1164510095, issued on Oct 10, 2006. Check the license (Massachusetts 156165, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Nathalie Rioux
- Credential
- M.D.
- Primary taxonomy
- Glaucoma Specialist (Ophthalmology) Physician 207WX0009X
- License number
- 156165 MA
Self-reported in NPPES; status is on the state search - Practice location
- Pioneer Valley Ophthalmic Consultants, Greenfield, MA 01301
- Phone
- (413) 775-9900
- Enumerated
- Oct 10, 2006
- Record last updated
- Jan 15, 2022
- Medicare enrollment
- Enrolled (PECOS I20050103000899); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest glaucoma specialist (ophthalmology) physician records → All 13 in Massachusetts → Look up another NPI →
Verify Nathalie Rioux in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 156165Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% more Medicare Part D claims than the average glaucoma specialist (ophthalmology) physician in 2024
4,641 Medicare Part D claims for 1,086 beneficiaries, against an average of 3,060 among the 430 providers of this specialty who prescribed in Part D. Brand-name drugs were 38% of claims.
Most prescribed
- Latanoprost755 claims
- Ketorolac Tromethamine495 claims
- Timolol Maleate446 claims
- Dorzolamide-Timolol393 claims
- Moxifloxacin374 claims
- Prednisolone Acetate345 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $207.18
11 payments; by number, the most common kind was food and beverage; the largest payer was Ocular Therapeutix, Inc. The 391 providers of this specialty with any payment received $5,284.60 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
- Rioux Eye Center IncGreenfield, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathalie Rioux among 13 glaucoma specialist (ophthalmology) physician records in Massachusetts
Nathalie Rioux, M.D. is one of 13 glaucoma specialist (ophthalmology) physician records with a practice address in Massachusetts. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 54% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 85% of these records are
- Graduated1991 · median 2008 among the 11 with a school on file
- Record last updated2022 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207WX0009X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Glaucoma Specialist (Ophthalmology) Physician providers in Massachusetts
There are 13 glaucoma specialist (ophthalmology) physician records in Massachusetts.
All 13 in Massachusetts → Every provider in Greenfield → Glaucoma Specialist (Ophthalmology) Physician nationwide →
The 8 glaucoma specialist (ophthalmology) physician records with the nearest ZIP codes
- Brigette Cole, MDWest Springfield, MA 010891639631757
- Isha Ingle, MDWorcester, MA 016051104579564
- Michael Cooper, M.D.Burlington, MA 018051881786739
- Aseef Ahmed, DOBoston, MA 021111649769233
- Deidrya Jackson, MD MPHBoston, MA 021111649658931
- Chandrasekharan Krishnan, M.D.Boston, MA 021111548225139
- Cynthia Mattox, M.D.Boston, MA 021111194780825
- Sarwat Salim, MDBoston, MA 021111114999471
Common questions
What is Nathalie Rioux, M.D.'s NPI number?
Nathalie Rioux, M.D.'s National Provider Identifier (NPI) is 1164510095, issued on Oct 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nathalie Rioux, M.D. located?
The NPPES record lists a practice address at Pioneer Valley Ophthalmic Consultants, Greenfield, MA, 01301. Phone: (413) 775-9900. Providers update this record themselves, so call before visiting.
How can I verify Nathalie Rioux, M.D.'s license?
NPPES lists Massachusetts license number 156165, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Nathalie Rioux, M.D. prescribe under Medicare Part D?
In 2024, Nathalie Rioux, M.D. had 4,641 Medicare Part D claims for 1,086 beneficiaries; the average among glaucoma specialist (ophthalmology) physician prescribers was 3,060. Part D covers Medicare prescriptions only.
What is Nathalie Rioux, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.