NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Joseph H Mayer, MD

Clinical Neurophysiology Physician in Blue Island, IL · enumerated 2006 · practices at Dupage Medical Group, Ltd.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1316901234

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Joseph H Mayer
Credential MD
Sex Male
Practice address 2320 High St, Blue Island, IL, 60406
Phone (708) 388-5500
Fax (708) 388-5672
Enumeration date Apr 17, 2006
Last updated in NPPES Oct 12, 2021

Taxonomy & licenses

2084N0600X Clinical Neurophysiology Physician Allopathic & Osteopathic Physicians · License 036063953 (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
036063953 Medicaid IL -
130023545 Other IL RAILROAD MEDICARE

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Joseph Mayer?
The National Provider Identifier (NPI) for Joseph Mayer is 1316901234, a Type 1 (individual) record in the CMS NPPES registry.
Where does Joseph Mayer practice?
The practice location on file with NPPES is in Blue Island, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-10-12.