Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Nathan Simcha Birnbaum, DDS CAGS
Prosthodontics in Wellesley, MA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1740206259
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Registry record
Entity type Individual (Type 1)
Name Dr. Nathan Simcha Birnbaum
Credential DDS CAGS
Sex Male
Practice address 1 Washington St, Suite 306, Wellesley, MA, 02481
Phone (781) 431-9999
Fax (781) 431-9195
Enumeration date Jul 15, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
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
Is NPI 1740206259 active?
Yes, as of the latest NPPES snapshot, NPI 1740206259 is active (record last updated 2007-07-08).
How do I verify Nathan Birnbaum's NPI record?
Cross-check NPI 1740206259 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.