Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Thomas Martin Cassidy, O.D.
Optometrist in Canton, MI · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1649324096
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Registry record
Entity type Individual (Type 1)
Name Dr. Thomas Martin Cassidy
Credential O.D.
Sex Male
Practice address 43050 Ford Rd, Ste. 170, Canton, MI, 48187
Phone (734) 981-2700
Fax (734) 981-0198
Enumeration date Jan 23, 2007
Last updated in NPPES Jul 8, 2007
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
What is the NPI number for Thomas Cassidy?
The National Provider Identifier (NPI) for Thomas Cassidy is 1649324096, a Type 1 (individual) record in the CMS NPPES registry.
Where does Thomas Cassidy practice?
The practice location on file with NPPES is in Canton, MI. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Canton Foot Specialist PC Podiatrist · Canton, MI NPI 1225021355 James Duncan Podiatrist · Canton, MI NPI 1861485864 Richard Stec General Practice Dentistry · Canton, MI NPI 1023170735 Alpha Home Healthcare Services, Inc. Home Health Agency · Canton, MI NPI 1184764144 Ayman Daoud Internal Medicine Physician · Canton, MI NPI 1073640355 Senior Care Home Health Care, Inc Home Health Agency · Canton, MI NPI 1730413873 Atrium Home Health Care, Inc. Home Health Agency · Canton, MI NPI 1235443870 Michigan Pain Physicians PC Interventional Pain Medicine Physician · Canton, MI NPI 1861702805
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.