Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Frank G Oppenheim, D.M.D., PH.D.
Periodontics in Cambridge, MA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1770770422
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Registry record
Entity type Individual (Type 1)
Name Frank G Oppenheim
Credential D.M.D., PH.D.
Sex Male
Practice address 1692 Mass Ave, Cambridge, MA, 02138
Phone (617) 864-5457
Enumeration date Sep 26, 2007
Last updated in NPPES Sep 26, 2007
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 specialty is Frank Oppenheim?
Frank Oppenheim is registered in NPPES with the primary taxonomy of Periodontics. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-09-26.