Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Theresa Lam, O.D.
Optometrist in Boston, MA · enumerated 2016.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1326591801
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Registry record
Entity type Individual (Type 1)
Name Theresa Lam
Credential O.D.
Sex Female
Practice address 7 Allstate Rd, Boston, MA, 02125
Phone (617) 512-1033
Enumeration date Aug 1, 2016
Last updated in NPPES Jan 26, 2022
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD 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
Where does Theresa Lam practice?
The practice location on file with NPPES is in Boston, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Theresa Lam?
The National Provider Identifier (NPI) for Theresa Lam is 1326591801, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-01-26.