Dr. John Terrence Sinclair, DDS
Dr. John Terrence Sinclair is a General Practice Dentistry provider (Dentist) practicing in Pittsfield, MA, registered in the NPPES registry with NPI 1538165832 since 2005. The credential DDS stands for Doctor of Dental Surgery. Practices at John T Sinclair (listed at the same practice address in NPPES).
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1538165832 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. John Terrence Sinclair |
| Credential | DDS |
| Sex | Male |
| Practice address | 207 1ST ST, Pittsfield, MA, 01201 |
| Phone | 4134457791 |
| Fax | 4134457532 |
| Enumeration date | 2005-06-22 |
| Last updated in NPPES | 2007-07-08 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1223G0001X | General Practice Dentistry | Primary | 14912 | MA |
DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential
Copy-ready billing details
Provider: John Sinclair, DDS NPI: 1538165832 Taxonomy: 1223G0001X (General Practice Dentistry) Address: 207 1ST ST, Pittsfield, MA, 01201
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1437450277 | John T Sinclair | Organization | Customized Equipment (DME) | Pittsfield, MA |
| 1720748106 | Kate Frissell | Individual | Addiction (Substance Use Disorder) Counselor | Pittsfield, MA |
Verify this record
Cross-check NPI 1538165832 against the authoritative CMS record: view Dr. John Terrence Sinclair on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Is NPI 1538165832 active?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.