Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Stephen Dennis Northrop, D.D.S., M.D.

Neurology Physician in Beach Park, IL · enumerated 2010.

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

National Provider Identifier

1164732525

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Registry record

Entity type Individual (Type 1)

Name Dr. Stephen Dennis Northrop

Credential D.D.S., M.D.

Sex Male

Practice address 12865 W Audrey Ave, Beach Park, IL, 60087

Phone (218) 349-7058

Enumeration date Oct 19, 2010

Last updated in NPPES Oct 19, 2010

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 29638 (CA) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 036087093 (IL) Primary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 38583020 (WI) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 81051 (FL) Secondary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

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

Where does Stephen Northrop practice?

The practice location on file with NPPES is in Beach Park, IL. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Stephen Northrop?

The National Provider Identifier (NPI) for Stephen Northrop is 1164732525, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-10-19.