Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Roger C Gronau, PHD
Psychologist in Woodstock, IL · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1992704225
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Registry record
Entity type Individual (Type 1)
Name Roger C Gronau
Credential PHD
Sex Male
Practice address 527 W South St, Woodstock, IL, 60098
Phone (815) 338-9199
Fax (815) 338-9205
Enumeration date Jul 19, 2005
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
103T00000X Psychologist Behavioral Health & Social Service Providers · License 1957-057 (WI) Secondary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers.
About the PHD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 05619771 | Other | IL | BCBS |
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 Roger Gronau practice?
The practice location on file with NPPES is in Woodstock, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Roger Gronau?
The National Provider Identifier (NPI) for Roger Gronau is 1992704225, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.