Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum
John N. Kostidis
Chiropractor in Valparaiso, IN · enumerated 2007 · authorized official John Kostidis, Chiropractor.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1932381746
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Registry record
Taxonomy & classification
Authorized official
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 084890 | Other | IN | MEDICARE GRP |
| 000000488762 | Other | IN | ANTHEM IND |
| 1467491209 | Other | IN | ANTHEM |
| 1801819305 | Other | IN | ANTHEM |
| 4471101 | Other | IN | AETNA |
| 667535 | Other | IN | ACN IND |
| 000000283870 | Other | IN | ANTHEM IND |
| 000000284649 | Other | IN | ANTHEM IND |
| 1639128929 | Other | IN | ANTHEM |
| 200441700A | Medicaid | IN | - |
| 609638 | Other | IN | ACN IND |
| 603682 | Other | IN | ACN IND |
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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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-12-07.