Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
James William Cassillo, DC
Chiropractor in Massapequa, NY · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1871592295
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Registry record
Entity type Individual (Type 1)
Name James William Cassillo
Credential DC
Sex Male
Practice address 5798 Merrick Rd, Massapequa, NY, 11758
Phone (516) 795-6666
Fax (516) 795-6834
Enumeration date Jul 18, 2005
Last updated in NPPES Jul 8, 2007
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
Is NPI 1871592295 active?
Yes, as of the latest NPPES snapshot, NPI 1871592295 is active (record last updated 2007-07-08).
How do I verify James Cassillo's NPI record?
Cross-check NPI 1871592295 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
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.