Nathalie Rioux, M.D.
Nathalie Rioux, M.D. is a Glaucoma Specialist (Ophthalmology) Physician in Greenfield, MA, registered under NPI 1164510095. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is PIONEER VALLEY OPHTHALMIC CONSULTANTS 489 BERNARDSTON ROAD, Greenfield, MA 01301. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 156165 | MA | Glaucoma Specialist (Ophthalmology)… primary |
| 156165 | MA | Ophthalmology Physician |
This provider holds licence 156165 issued in MA. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Ophthalmology
- PAC ID
- 0143288415
Medicare enrolment is recorded as approved under the provider type Practitioner - Ophthalmology. This means the provider is enrolled to bill Medicare, though it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Glaucoma Specialist covers
An ophthalmologist who specializes in the treatment of glaucoma and other disorders related to increased intraocular pressure and optic nerve damage. This specialty involves the medical and surgical treatment of these conditions. NUCC Health Care Provider Taxonomy, code 207WX0009X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207WX0009X | Glaucoma Specialist (Ophthalmology) Physician Glaucoma Specialist | 156165 | MA | primary |
| 207W00000X | Ophthalmology Physician | 156165 | MA |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1164510095 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Oct 10, 2006 |
| Last updated | Jan 15, 2022 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
PIONEER VALLEY OPHTHALMIC CONSULTANTS 489 BERNARDSTON ROAD Greenfield, MA 01301 (413) 775-9900 |
| Mailing address |
PIONEER VALLEY OPHTHALMIC 489 BERNARDSTON ROAD Greenfield, MA 01301 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 1 | 6 | 4 | 5 | 1 | 0 | 0 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 1 | 3 | 4 | 1 | 1 | 0 | 0 | 9 |
Sum = 45 · next multiple of 10 = 50 · check digit = 5 · actual last digit = 5
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.