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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Lars Rikardsen, M.D.

Family Medicine Physician in Naperville, IL · enumerated 2015.

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

National Provider Identifier

1558749226

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Registry record

Entity type Individual (Type 1)
Name Dr. Lars Rikardsen
Credential M.D.
Sex Male
Practice address 640 S Washington St Ste 350, Naperville, IL, 60540
Phone (630) 717-2646
Fax (630) 717-2613
Enumeration date May 13, 2015
Last updated in NPPES Aug 18, 2023

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 125067370 (IL) Secondary
390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 036146098 (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
036146098 Medicaid IL -

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.

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Frequently asked questions

How do I verify Lars Rikardsen's NPI record?
Cross-check NPI 1558749226 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1558749226 active?
Yes, as of the latest NPPES snapshot, NPI 1558749226 is active (record last updated 2023-08-18).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-18.