Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Jeffrey Michael Block, D.C.
Orthopedic Chiropractor in Smithtown, NY · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1871557868
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 113151304 | Other | - | ANTHEM |
| 113151304 | Other | - | GHI |
| 113151304 | Other | - | ISLAND GROUP ADMINISTRATO |
| 113151304 | Other | - | LOCAL 1199 |
| 113151304 | Other | - | LANDMARK |
| 3C1588 | Other | - | HEALTHNET |
| 113151304 | Other | - | BEECH STREET |
| P6455574 | Other | - | OXFORD |
| 113151304 | Other | - | HORIZON |
| 113151304 | Other | - | LOCAL 707 |
| 113151304 | Other | - | MAGNACARE |
| 113151394 | Other | - | AFFORDABLE |
| 1003555 | Other | - | ASHN |
| 1012459 | Other | - | UNITED HEALTHCARE |
| 113151304 | Other | - | THE EMPIRE PLAN |
| 543597 | Other | NY | AETNA |
| 7401552113 | Other | - | CIGNA |
| 113151304 | Other | - | JJ NEWMAN |
| 113151304 | Other | - | LAWRENCE HEALTHCARE |
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
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Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-11-19.