NPPES file of Aug 9, 2026

Stella Kim Yoo, M.D.

Radiation Oncology Physician · Los Angeles, CA

Stella Kim Yoo, M.D. is a radiation oncology physician with a practice address in Los Angeles, California, and NPI 1275944084, issued on May 14, 2014. Check the license (California A140409, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1275944084
Name
Stella Kim Yoo
Credential
M.D.
Primary taxonomy
Radiation Oncology Physician 2085R0001X
License numbers
A140409 CA
MT205717 PA
Self-reported in NPPES; status is on the state search
Practice location
1441 Eastlake Ave, Los Angeles, CA 90089
Phone
(323) 865-3050
Enumerated
May 14, 2014
Record last updated
Nov 27, 2023
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 1441 Eastlake Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Mark Agulnik, MDMedical Oncology Physician1164448734
  2. Sandra AlgazeMedical Oncology Physician1861886707
  3. Paige Asawa, LMFTMarriage & Family Therapist1487296406
  4. Akbar Ashrafi, MDStudent in an Organized Health Care Education/Training Program1063913531
  5. Cherry AuHematology & Oncology Physician1346828076
  6. Raed Azhar, M.DUrology Physician1093061053

Verify Stella Kim Yoo in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A140409
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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90% fewer Medicare Part D claims than the average radiation oncology physician in 2024

13 Medicare Part D claims, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.

  1. Stella Yoo13
  2. Specialty average134

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.

Stella Kim Yoo among 735 radiation oncology physician records in California

Stella Kim Yoo, M.D. is one of 735 radiation oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 79% of them.

  • NPI issued2014 · 79% of these records are older, 18% newer
  • In a Medicare fileYes · 83% of these records are
  • In the CMS Doctors and Clinicians fileNo · 74% of these records are
  • Record last updated2023 · 55% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Radiation Oncology Physician providers in California

There are 735 radiation oncology physician records in California.

The 8 radiation oncology physician records with the nearest ZIP codes

  1. Leslie Ballas, MDLos Angeles, CA 900891235388901
  2. Eric Chang, M.D.Los Angeles, CA 900891306930342
  3. Adam Garsa, M.D.Los Angeles, CA 900891306008768
  4. Jennifer Ho, MDLos Angeles, CA 900891740626019
  5. David Hong, M.D.Los Angeles, CA 900891134464795
  6. Richard Jennelle, M.D.Los Angeles, CA 900891215053335
  7. Daniel Kim, M.D.Los Angeles, CA 900891306156153
  8. Ronald Lau, MDLos Angeles, CA 900891578639993

Common questions

What is Stella Kim Yoo, M.D.'s NPI number?

Stella Kim Yoo, M.D.'s National Provider Identifier (NPI) is 1275944084, issued on May 14, 2014. An NPI identifies a provider in billing; it is not a license.

Where is Stella Kim Yoo, M.D. located?

The NPPES record lists a practice address at 1441 Eastlake Ave, Los Angeles, CA, 90089. Phone: (323) 865-3050. Providers update this record themselves, so call before visiting.

How can I verify Stella Kim Yoo, M.D.'s license?

NPPES lists California license number A140409, 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 Stella Kim Yoo, M.D. prescribe under Medicare Part D?

In 2024, Stella Kim Yoo, M.D. had 13 Medicare Part D claims; the average among radiation oncology physician prescribers was 134. 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.