Karen M. Yun, M.D.
Medical Oncology Physician · San Diego, CA
Karen M. Yun, M.D. is a medical oncology physician with a practice address in San Diego, California, and NPI 1720519234, issued on Mar 26, 2017. Check the license (California A158032, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karen M. Yun
- Credential
- M.D.
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- A158032 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 W Arbor Dr, San Diego, CA 92103
- Phone
- (800) 926-8273
- Enumerated
- Mar 26, 2017
- Record last updated
- Nov 17, 2025
- Fax
- (888) 539-8781
- Medicare enrollment
- Enrolled (PECOS I20230526001045); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 447 in California → Look up another NPI →
Also registered at 200 W Arbor Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alison A'Court, MDAnesthesiology Physician1912218199
- Benjamin Abbadessa, M.D.Colon & Rectal Surgery Physician1255593612
- Geraldine Abcede, RNCertified Registered Nurse Anesthetist1982384046
- Joseph Abdelmalek, M.DNephrology Physician1740485531
- Kristy AbelCertified Registered Nurse Anesthetist1962113035
- Paula Abeleda, NPFamily Nurse Practitioner1558945022
Verify Karen M. Yun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A158032Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average medical oncology physician in 2024
446 Medicare Part D claims for 64 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 33 claims were for opioids.
Most prescribed
- Prochlorperazine Maleate59 claims
- Gabapentin54 claims
- Ondansetron Hcl48 claims
- Lidocaine Hcl Viscous38 claims
- Levothyroxine Sodium28 claims
- Eliquis25 claims
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.
Industry payments in 2024: $114.98
1 payment: food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. The 3,343 providers of this specialty with any payment received $11,773.47 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Regents OF The University OF CaliforniaSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen M. Yun among 447 medical oncology physician records in California
Karen M. Yun, M.D. is one of 447 medical oncology physician records with a practice address in California. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 85% of them.
- NPI issued2017 · 85% of these records are older, 11% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2017 · median 2004 among the 312 with a school on file
- Record last updated2025 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in California
There are 447 medical oncology physician records in California.
All 447 in California → Every provider in San Diego → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Kaitlyn Dykes, MDSan Diego, CA 921031861952632
- Bassel El-Rayes, MDSan Diego, CA 921031437196433
- Wenji Guo, MDSan Diego, CA 921031538604392
- Siddharth Iyengar, MDSan Diego, CA 921031003376187
- Tanim Jain, MDSan Diego, CA 921031528695145
- Olivia Main, MDSan Diego, CA 921031225664352
- Kelly McCann, M.D., PH.D.San Diego, CA 921031942599915
- Christina SniderSan Diego, CA 921031356960751
Common questions
What is Karen M. Yun, M.D.'s NPI number?
Karen M. Yun, M.D.'s National Provider Identifier (NPI) is 1720519234, issued on Mar 26, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Karen M. Yun, M.D. located?
The NPPES record lists a practice address at 200 W Arbor Dr, San Diego, CA, 92103. Phone: (800) 926-8273. Providers update this record themselves, so call before visiting.
How can I verify Karen M. Yun, M.D.'s license?
NPPES lists California license number A158032, 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 Karen M. Yun, M.D. prescribe under Medicare Part D?
In 2024, Karen M. Yun, M.D. had 446 Medicare Part D claims for 64 beneficiaries; the average among medical oncology physician prescribers was 703. 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.