Dr. John M Underhill, DDS
Dr. John M Underhill is a Orthodontics and Dentofacial Orthopedics Dentistry provider (Dentist) practicing in Wakefield, RI, registered in the NPPES registry with NPI 1699800359 since 2007. The credential DDS stands for Doctor of Dental Surgery.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1699800359 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. John M Underhill |
| Credential | DDS |
| Sex | Male |
| Practice address | Wakefield, RI, 02879 |
| Phone | 4017821221 |
| Fax | 4017834069 |
| Enumeration date | 2007-02-22 |
| Last updated in NPPES | 2007-07-08 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1223X0400X | Orthodontics and Dentofacial Orthopedics Dentistry | Primary | DEN2107 | RI |
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 Underhill, DDS NPI: 1699800359 Taxonomy: 1223X0400X (Orthodontics and Dentofacial Orthopedics Dentistry) Address: Wakefield, RI, 02879
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1366441388 | Frank Dequattro | Individual | Orthodontics and Dentofacial Orthopedics Dentistry | Wakefield, RI |
| 1437124328 | Gerald Rousseau | Individual | Physical Therapist | Wakefield, RI |
| 1508828088 | Frank A. Dequattro, Dmd | Organization | Orthodontics and Dentofacial Orthopedics Dentistry | Wakefield, RI |
| 1700848579 | Susan Sabol | Individual | Psychologist | Wakefield, RI |
| 1972566644 | James Mccormick | Individual | Foot Surgery Podiatrist | Wakefield, RI |
| 1417915232 | Donna Hagerty | Individual | General Practice Dentistry | Wakefield, RI |
| 1679518625 | Gary Post | Individual | Chiropractor | Wakefield, RI |
| 1740216035 | Shoreline Podiatry, LLC | Organization | Foot & Ankle Surgery Podiatrist | Wakefield, RI |
Verify this record
Cross-check NPI 1699800359 against the authoritative CMS record: view Dr. John M Underhill 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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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.