Leonard Bertheau, D.O.
Leonard Bertheau, D.O. is a Diabetology (Family Medicine) Physician in Pawtucket, RI, registered under NPI 1912079500. 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 111 BREWSTER ST, Pawtucket, RI 02860. 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 |
|---|---|---|
| DO01307 | RI | Diabetology (Family Medicine) Physician primary |
| DO01307 | RI | Family Medicine Physician |
This provider holds licence DO01307 issued in RI. 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 - Family Practice
- PAC ID
- 8729170402
- Enrollment ID
- I20240215003557
Medicare enrolment is recorded as approved under the provider type Practitioner - Family Practice. 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 Diabetology covers
A family medicine physician who specializes in diagnosis and management of type 1, type 2, gestational, and atypical diabetes; diabetes complications; hospital management of diabetic patients; use of technology in the treatment and monitoring of diabetes; management of ancillary diagnoses, such as hypertension, obesity, lipidemia, etc.; and education and counseling on nutrition and lifestyle management. NUCC Health Care Provider Taxonomy, code 207QD0401X
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 | |
|---|---|---|---|---|
| 207QD0401X | Diabetology (Family Medicine) Physician Diabetology | DO01307 | RI | primary |
| 207Q00000X | Family Medicine Physician | DO01307 | RI |
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 | 1912079500 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Nov 15, 2006 |
| Last updated | Dec 18, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | D.O. |
| Practice address |
111 BREWSTER ST Pawtucket, RI 02860 (401) 729-2304 Fax (401) 729-2923 |
| Mailing address |
455 TOLL GATE RD Warwick, RI 02886 |
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 | 9 | 1 | 2 | 0 | 7 | 9 | 5 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 9 | 2 | 2 | 0 | 7 | 9 | 5 | 0 |
Sum = 60 · next multiple of 10 = 60 · check digit = 0 · actual last digit = 0
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.