Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mr. Leonard Tiger Onsen

Individual provider Sports Medicine (Orthopaedic Surgery) Physician · NPI 1104321421

Mr. Leonard Tiger Onsen is a Sports Medicine in Los Angeles, California. Qualified in 2018, 8 years ago. Practices with Osf Multi-Specialty Group, a 2,128-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California and Illinois.

Years since qualifying
8
Licensed in
CA, IL
In the registry since
2018
Specialties on file
3
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Practice location Address checks out

6801 Park Ter Ste 400
Los Angeles, CA 90045-9212
Phone: (310) 665-7200
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1740 W Taylor St, Chicago, IL 60612-7232 — (866) 600-2273

Specialties & licences

Sports Medicine (Orthopaedic Surgery) Physician (primary) Taxonomy 207XX0005X · Licence A185557 (CA)
Sports Medicine (Orthopaedic Surgery) Physician Taxonomy 207XX0005X · Licence 036171278 (IL)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence 036171278 (IL)

Record details

NPI number1104321421
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedMarch 28, 2018
Last updated in NPPESNovember 17, 2025
Certification dateNovember 17, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtySPORTS MEDICINE
Also practisesORTHOPEDIC SURGERY
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Group practice Osf Multi-Specialty Group — 2128 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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