NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Erlund John Larson, PHD.,MD

Internal Medicine Physician in Norton Shores, MI · enumerated 2005.

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

National Provider Identifier

1417949090

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Erlund John Larson
Credential PHD.,MD
Sex Male
Practice address 427 Seminole Rd, Suite 200, Norton Shores, MI, 49444
Phone (231) 739-6000
Fax (231) 739-6004
Enumeration date Aug 18, 2005
Last updated in NPPES Mar 3, 2017

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 4301074029 (MI) Primary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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

What is the NPI number for Erlund Larson?
The National Provider Identifier (NPI) for Erlund Larson is 1417949090, a Type 1 (individual) record in the CMS NPPES registry.
Where does Erlund Larson practice?
The practice location on file with NPPES is in Norton Shores, MI. 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 2017-03-03.