NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Norman J. Hammer, MS, DDS

Prosthodontics in Boston, MA · enumerated 2006 · practices at Cohen, Silvestri, Rogoff,& Hammer,PC.

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

National Provider Identifier

1164441762

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Norman J. Hammer
Credential MS, DDS
Sex Male
Practice address 3 Post Office Sq, 9th Floor, Boston, MA, 02109
Phone (617) 426-6011
Fax (617) 426-4680
Enumeration date Jul 18, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223P0700X Prosthodontics Dental Providers · License 15587 (MA) 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

What is the NPI number for Norman Hammer?
The National Provider Identifier (NPI) for Norman Hammer is 1164441762, a Type 1 (individual) record in the CMS NPPES registry.
Where does Norman Hammer practice?
The practice location on file with NPPES is in Boston, 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 2007-07-08.