Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Tom Anastasis Grantis, D.C.
Chiropractor in East Islip, NY · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1053449876
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. Tom Anastasis Grantis
Credential D.C.
Sex Male
Practice address 280 E Main St, East Islip, NY, 11730
Phone (631) 224-3036
Fax (631) 224-4764
Enumeration date Mar 1, 2007
Last updated in NPPES Jan 3, 2025
Taxonomy & licenses
DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders.
About the DC 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 Tom Grantis?
The National Provider Identifier (NPI) for Tom Grantis is 1053449876, a Type 1 (individual) record in the CMS NPPES registry.
Where does Tom Grantis practice?
The practice location on file with NPPES is in East Islip, NY. 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 2025-01-03.