William Simpson, M.D.
Sports Medicine (Orthopaedic Surgery) Physician · Los Angeles, CA
William Simpson, M.D. is a sports medicine (orthopaedic surgery) physician with a practice address in Los Angeles, California, and NPI 1689860801, issued on Sep 20, 2007. Check the license (California G43101, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Simpson
- Credential
- M.D.
- Primary taxonomy
- Sports Medicine (Orthopaedic Surgery) Physician 207XX0005X
- License number
- G43101 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6310 San Vicente Blvd, Los Angeles, CA 90048
- Phone
- (323) 503-5209
- Enumerated
- Sep 20, 2007
- Record last updated
- Oct 28, 2014 (not updated in 12 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest sports medicine (orthopaedic surgery) physician records → All 384 in California → Look up another NPI →
Also registered at 6310 San Vicente Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William Simpson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G43101Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average sports medicine (orthopaedic surgery) physician in 2024
17 Medicare Part D claims, against an average of 288 among the 2,562 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
William Simpson among 384 sports medicine (orthopaedic surgery) physician records in California
William Simpson, M.D. is one of 384 sports medicine (orthopaedic surgery) physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 43% of them.
- NPI issued2007 · 43% of these records are older, 43% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileNo · 76% of these records are
- Record last updated2014 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207XX0005X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Sports Medicine (Orthopaedic Surgery) Physician providers in California
There are 384 sports medicine (orthopaedic surgery) physician records in California.
All 384 in California → Every provider in Los Angeles → Sports Medicine (Orthopaedic Surgery) Physician nationwide →
The 8 sports medicine (orthopaedic surgery) physician records with the nearest ZIP codes
- Joseph Cooper, M.D.Los Angeles, CA 900481518377241
- Mark Ganjianpour, M.D.Los Angeles, CA 900481447229570
- Robert Klapper, M.D.West Hollywood, CA 900481104984442
- Ekaterina Urch, M.D.Los Angeles, CA 900481548550890
- Robert Wilson, M.D.Los Angeles, CA 900481578682027
- Michael Banffy, MDLos Angeles, CA 900451558497982
- Jacob Cohen, MDLos Angeles, CA 900451932736071
- Ralph Gambardella, MDLos Angeles, CA 900451205803087
Common questions
What is William Simpson, M.D.'s NPI number?
William Simpson, M.D.'s National Provider Identifier (NPI) is 1689860801, issued on Sep 20, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William Simpson, M.D. located?
The NPPES record lists a practice address at 6310 San Vicente Blvd, Los Angeles, CA, 90048. Phone: (323) 503-5209. Providers update this record themselves, so call before visiting.
How can I verify William Simpson, M.D.'s license?
NPPES lists California license number G43101, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Simpson, M.D. prescribe under Medicare Part D?
In 2024, William Simpson, M.D. had 17 Medicare Part D claims; the average among sports medicine (orthopaedic surgery) physician prescribers was 288. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.