Robert Marc Grassi, DMD
Robert Marc Grassi is a General Practice Dentistry provider (Dentist) practicing in Winchester, MA, registered in the NPPES registry with NPI 1902405202 since 2020. The credential DMD stands for Doctor of Medicine in Dentistry.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1902405202 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Robert Marc Grassi |
| Credential | DMD |
| Sex | Male |
| Practice address | Winchester, MA, 01890 |
| Phone | 3392081177 |
| Enumeration date | 2020-10-19 |
| Last updated in NPPES | 2020-10-19 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1223G0001X | General Practice Dentistry | Primary | 105708 | CA |
DMD — Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD credential
Copy-ready billing details
Provider: Robert Grassi, DMD NPI: 1902405202 Taxonomy: 1223G0001X (General Practice Dentistry) Address: Winchester, MA, 01890
Verify this record
Cross-check NPI 1902405202 against the authoritative CMS record: view Robert Marc Grassi 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 1902405202 active?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2020-10-19.