Karen Yun, M.D.
NPI 1720519234 · Medical Oncology Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karen Yun, M.D. is a Medical Oncology Physician provider in San Diego, CA (NPI 1720519234).
Provider details
- NPI number
- 1720519234
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A158032 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
9 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
377 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 239 | $148 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 58 | $98 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 32 | $185 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 22 | $65 |
| Advance Care Planning, First 30 Minutes99497 | 15 | $77 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prochlorperazine Maleate | 59 | 34 |
| Gabapentin | 54 | 21 |
| Ondansetron Hcl | 48 | 34 |
| Lidocaine Hclbrand: Lidocaine Hcl Viscous | 38 | 18 |
| Levothyroxine Sodium | 28 | — |
| Apixabanbrand: Eliquis | 25 | — |
| Oxycodone Hcl | 24 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$115 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 3855 Health Sciences DrLa Jolla, CA 92093-1503Phone: (800) 926-8273Fax: (888) 539-8781
Registry dates
- Enumerated
- 2017-03-26
- Last updated
- 2025-11-17
- Certified
- 2025-11-17
Frequently asked questions
- What is Karen Yun's NPI number?
- Karen Yun's National Provider Identifier (NPI) is 1720519234, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Yun's specialty?
- Karen Yun is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Karen Yun located?
- Karen Yun's practice location on file with NPPES is 200 W Arbor Dr, San Diego, CA 92103-9000.
- What is Karen Yun's phone number?
- The practice phone number listed in the NPPES registry for Karen Yun is (800) 926-8273.
- Does Karen Yun accept Medicare?
- Karen Yun is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karen Yun's NPI active?
- Yes — Karen Yun's NPI (1720519234) is active in the NPPES registry as of the last update on 2025-11-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.