Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Marc Christopher Valli, D.M.D.
Dentist in Groton, MA · enumerated 2013.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1245676816
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Registry record
Entity type Individual (Type 1)
Name Dr. Marc Christopher Valli
Credential D.M.D.
Sex Male
Practice address 292 Main St, Groton, MA, 01450
Phone (978) 448-5241
Enumeration date May 22, 2013
Last updated in NPPES Mar 5, 2021
Taxonomy & licenses
DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees.
About the DMD 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.
Frequently asked questions
What is the NPI number for Marc Valli?
The National Provider Identifier (NPI) for Marc Valli is 1245676816, a Type 1 (individual) record in the CMS NPPES registry.
Where does Marc Valli practice?
The practice location on file with NPPES is in Groton, MA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-05.