Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
John H Niemeyer, MD
Diagnostic Radiology Physician in St Louis, MO · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1083621155
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 003013128 | Other | - | CARE |
| 398022 | Other | - | HLT PART |
| 431725842MID | Other | - | MERCY |
| 6707 | Other | - | HCARE USA |
| 008012444 | Other | - | MO CARE |
| 101033 | Other | - | H LINK |
| 1078154 | Other | - | MC MCAID |
| A12511 | Other | - | GATE WAY |
| 300066988 | Other | - | RR CARE |
| 003013128 | Other | - | MO CARE |
| 008012444 | Other | - | CARE |
| 1650514 | Other | - | PH PLAN |
| 28081 | Other | - | BLUE CHOICE |
| 2781 | Other | - | GHP |
| 0090000352 | Other | - | IL BLUE |
| 1390 | Other | - | MO BLUE |
| 202282406 | Other | - | MO CAID |
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 2009-03-18.