NPI
John D Siekmann
NPI 1336240191
Read from the NPPES registry on October 23, 2026.
Facts
- Status
- Active
- Credential
- DDS
- Type
- Individual
- Enumeration date
- 2006-09-26
- Last updated
- 2007-07-08
Run it in Rivvi
Check your whole roster against NPI.
Deactivated, mismatched or missing NPIs across every provider, each with the fix. The kind that get claims denied.
Check the rosterFree to start. Opens Rivvi, the AI workspace for healthcare teams.
Is this you? Set up your practice's workspace from this NPI.
Specialties
Licenses
- License IL
- 019018511
Location
- Practice location
- 101 S Greenleaf St, Suite E
- City
- Gurnee IL
- Postal code
- 60031-3369
- Phone
- (847) 662-3100
Medicare
- PECOS
- No PECOS enrollment row matched this NPI.
LEIE
No exclusion found for this NPI in the OIG LEIE file dated October 9, 2026. Confirm on OIG's online search.
Nearby
Other NPIs in Gurnee, IL. 1,243 records in the public file.
Public data from NPPES and CMS. Not a credentialing determination.
Request removal of this page
This removes the page from rivvi.ai. It does not change the record in NPPES.