Joon Ki Yoon, M.D.
Internal Medicine Physician · Los Angeles, CA
Joon Ki Yoon, M.D. is an internal medicine physician with a practice address in Los Angeles, California, and NPI 1093984437, issued on Feb 28, 2008. Check the license (California A38293, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joon Ki Yoon
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A38293 CA
Self-reported in NPPES; status is on the state search - Practice location
- 241 N Figueroa St, Los Angeles, CA 90012
- Phone
- (213) 240-8049
- Enumerated
- Feb 28, 2008
- Record last updated
- Feb 28, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (213) 202-6096
- Medicare enrollment
- Enrolled (PECOS I20200807002526); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 241 N Figueroa St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Joon Ki Yoon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A38293Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Los Angeles County Department OF Public HealthMonrovia, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joon Ki Yoon among 17,696 internal medicine physician records in California
Joon Ki Yoon, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 40% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1977 · median 2004 among the 11,065 with a school on file
- Record last updated2008 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,423 internal medicine physician records list a practice address in Los Angeles
They are 1,423 of the 69,537 NPPES records with a practice address in Los Angeles, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Los Angeles → Internal Medicine Physician nationwide →
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- Huan Nguyen, M.D.Los Angeles, CA 900121841224474
Common questions
What is Joon Ki Yoon, M.D.'s NPI number?
Joon Ki Yoon, M.D.'s National Provider Identifier (NPI) is 1093984437, issued on Feb 28, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Joon Ki Yoon, M.D. located?
The NPPES record lists a practice address at 241 N Figueroa St, Los Angeles, CA, 90012. Phone: (213) 240-8049. Providers update this record themselves, so call before visiting.
How can I verify Joon Ki Yoon, M.D.'s license?
NPPES lists California license number A38293, 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.
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.