Paul Protomastro, M.D.
Paul Protomastro, M.D. is an Orthopaedic Hand Surgery Physician in Wilton, CT, registered under NPI 1215936992. This provider registers 3 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 45 DANBURY RD STE 100, Wilton, CT 06897. 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 |
|---|---|---|
| 039385 | CT | Orthopaedic Hand Surgery Physician primary |
| 039385 | CT | Sports Medicine (Orthopaedic Surgery)… |
| 039385 | CT | Orthopaedic Surgery Physician |
This provider holds licence 039385 issued in CT. 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 - Hand Surgery
- PAC ID
- 9032246475
- Enrollment ID
- I20101008000254
Medicare enrolment is recorded as approved under the provider type Practitioner - Hand Surgery. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Hand Surgery covers
An orthopaedic surgeon trained in the investigation, preservation and restoration by medical, surgical and rehabilitative means of all structures of the upper extremity directly affecting the form and function of the hand and wrist. NUCC Health Care Provider Taxonomy, code 207XS0106X
All registered taxonomy codes
This provider registers 3 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207XS0106X | Orthopaedic Hand Surgery Physician Hand Surgery | 039385 | CT | primary |
| 207XX0005X | Sports Medicine (Orthopaedic Surgery) Physician Sports Medicine | 039385 | CT | |
| 207X00000X | Orthopaedic Surgery Physician | 039385 | 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 | 1215936992 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jul 15, 2005 |
| Last updated | Mar 27, 2026 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
45 DANBURY RD STE 100 Wilton, CT 06897 (203) 845-2200 |
| Mailing address |
18444 N 25TH AVE STE 310 Phoenix, AZ 85023 |
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 | 2 | 1 | 5 | 9 | 3 | 6 | 9 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 2 | 5 | 9 | 3 | 3 | 9 | 9 |
Sum = 68 · next multiple of 10 = 70 · check digit = 2 · actual last digit = 2
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.