NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Kenji Oyasu, M.D.

Emergency Medicine Physician in Waukegan, IL · enumerated 2006.

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

National Provider Identifier

1487768552

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Registry record

Entity type Individual (Type 1)
Name Dr. Kenji Oyasu
Credential M.D.
Sex Male
Practice address Waukegan, IL, 60085
Phone (847) 360-3000
Enumeration date Aug 18, 2006
Last updated in NPPES Mar 9, 2020

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

261QR0405X Substance Use Disorder Rehabilitation Clinic/Center Ambulatory Health Care Facilities · License XO9045027 (IL) Secondary
146D00000X Personal Emergency Response Attendant Emergency Medical Service Providers · License 036092087 (IL) Secondary
207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 01066275A (IN) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

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Frequently asked questions

What is the NPI number for Kenji Oyasu?
The National Provider Identifier (NPI) for Kenji Oyasu is 1487768552, a Type 1 (individual) record in the CMS NPPES registry.
Where does Kenji Oyasu practice?
The practice location on file with NPPES is in Waukegan, IL. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-03-09.