Physician Profile
Unclaimed ProfileAbout ONSEN
Based in Los Angeles, CA, Leonard Tiger Onsen is listed in the NPI registry under sports medicine. Leonard is also listed as specialising in orthopaedic sports medicine and orthopaedic surgery.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What does Dr. Onsen specialise in?
Dr. Onsen is a sports medicine in Los Angeles, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “SPORTS MEDICINE”.
NPI registry
Where is Dr. Onsen located?
Dr. Onsen is listed at 6801 PARK TER STE 400, Los Angeles, CA 90045. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Onsen's phone number?
The number on file is (310) 665-7200. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Onsen?
Dr. Onsen's National Provider Identifier is 1104321421. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Onsen go to medical school?
Dr. Onsen attended Other, graduating in 2018. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Onsen have?
Dr. Onsen has 8 years experience. Calculated from a graduation year of 2018, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Onsen do most often?
According to Medicare billing data, Dr. Onsen performs procedures including aspiration and/or injection of fluid from large joint, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Onsen's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Onsen. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (310) 665-7200
- Email not available
Practice Locations
6801 PARK TER STE 400
Los Angeles, CA 90045
Procedures Most Often Billed to Medicare
1,909 services · 157 patients · 5 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
22 |
| Injection, methylprednisolone acetate, 1 mg | Drug given | J1010 |
1,760 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
72 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
43 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
12 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other sports medicines at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 30 related providers in 4 groups
Other sports medicines in Los Angeles 6
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2018 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Aspiration and/or injection of fluid from large joint 8
Providers in CA who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.