Eric Hyson, MD
Eric Hyson, MD is a Diagnostic Ultrasound Physician in Waterbury, CT, registered under NPI 1366409757. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
The practice address on file is 134 GRANDVIEW AVE STE 101, Waterbury, CT 06708. 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 |
|---|---|---|
| 021185 | CT | Diagnostic Ultrasound Physician primary |
| 021185 | CT | Diagnostic Radiology Physician |
This provider holds licence 021185 issued in CT. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Diagnostic Ultrasound covers
A Radiology doctor of Osteopathy that specializes in Diagnostic Ultrasound. NUCC Health Care Provider Taxonomy, code 2085U0001X
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 | |
|---|---|---|---|---|
| 2085U0001X | Diagnostic Ultrasound Physician Diagnostic Ultrasound | 021185 | CT | primary |
| 2085R0202X | Diagnostic Radiology Physician Diagnostic Radiology | 021185 | CT |
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 | 1366409757 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 28, 2006 |
| Last updated | Sep 11, 2025 |
| Status | Active |
| Sole proprietor | Yes |
| Credential | MD |
| Practice address |
134 GRANDVIEW AVE STE 101 Waterbury, CT 06708 (203) 756-8911 Fax (203) 574-0548 |
| Other identifiers |
06091160802
· Other OR0365 · Other A437740 · Other 711609 · Other 010021185CT02 · Other 001211853 · Medicaid (CT) |
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 | 3 | 6 | 6 | 4 | 0 | 9 | 7 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 3 | 3 | 6 | 8 | 0 | 9 | 7 | 1 |
Sum = 63 · next multiple of 10 = 70 · check digit = 7 · actual last digit = 7
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.