Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Michael James Riermaier, M.D.
Obstetrics Physician in Elgin, IL · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1376650135
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Registry record
Entity type Individual (Type 1)
Name Dr. Michael James Riermaier
Credential M.D.
Sex Male
Practice address 1435 N Randall Rd Ste 304, Elgin, IL, 60123
Phone (847) 697-7722
Fax (847) 697-7896
Enumeration date Aug 25, 2006
Last updated in NPPES Sep 18, 2012
Taxonomy & licenses
207VX0000X Obstetrics Physician Allopathic & Osteopathic Physicians · License 363816770 (IL) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 036065268 | Medicaid | IL | - |
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
Where does Michael Riermaier practice?
The practice location on file with NPPES is in Elgin, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Michael Riermaier?
The National Provider Identifier (NPI) for Michael Riermaier is 1376650135, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-09-18.