NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Roy Clark Simpson Jr., D.D.S.

General Practice Dentistry in Washington, IN · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1710108063

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Roy Clark Simpson Jr.
Credential D.D.S.
Sex Male
Practice address Washington, IN, 47501
Phone (812) 254-3313
Enumeration date May 2, 2007
Last updated in NPPES Jul 8, 2007

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 12006046A (IN) Primary
DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

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 → Validate an NPI →

Frequently asked questions

Where does Roy Simpson practice?
The practice location on file with NPPES is in Washington, IN. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Roy Simpson?
The National Provider Identifier (NPI) for Roy Simpson is 1710108063, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.