Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Gregory Joseph Maag, M.A.-FAAA
Audiologist in Alton, IL · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1467632570
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Registry record
Entity type Individual (Type 1)
Name Gregory Joseph Maag
Credential M.A.-FAAA
Sex Male
Practice address 1417 Washington Ave, Alton, IL, 62002
Phone (618) 462-7900
Fax (618) 462-0179
Enumeration date Nov 6, 2007
Last updated in NPPES Nov 6, 2007
Taxonomy & licenses
231H00000X Audiologist Speech, Language and Hearing Service Providers · License 147 000375 (IL) Primary
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
What is the NPI number for Gregory Maag?
The National Provider Identifier (NPI) for Gregory Maag is 1467632570, a Type 1 (individual) record in the CMS NPPES registry.
Where does Gregory Maag practice?
The practice location on file with NPPES is in Alton, IL. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → John Galbreath Chiropractor · Alton, IL NPI 1215095690 Gregory J Maag, Ma-Ccca Mid America Audiology Group, Ltd Audiologist · Alton, IL NPI 1720139967 Anne Byrnes Audiologist-Hearing Aid Fitter · Alton, IL NPI 1881807147 Alton Urgent Care Walk in Clinic Company Family Medicine Physician · Alton, IL NPI 1013521343
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-11-06.