Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
John C Dannenfeldt, MD
Family Medicine Physician in Silvis, IL · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1881699890
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 020348 | Other | - | HEALTH ALLIANCE |
| 20127 | Other | - | IOWA HEALTH SOLUTIONS |
| 97788 | Other | IA | WELLMARK BC/BS |
| IL0120 | Other | - | JOHN DEERE HEALTH PLAN |
| 036059049 | Medicaid | IL | - |
| 4796890014 | Other | - | DMERC |
| 97835 | Other | IA | WELLMARK BC/BS |
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.
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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-13.