HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / IL

LEONARD T ONSEN, MD

SPORTS MEDICINE

Graduated: 2018

Also: ORTHOPEDIC SURGERY

NPI: 1104321421

Practice Locations (1)

OSF MULTI-SPECIALTY GROUP

1050 E NORRIS DR, SUITE 3A ORTHO

OTTAWA, IL 613501646

8154315746

Source: CMS National Downloadable File, September 2026.