Stephanie Yoon, M.D.
NPI 1346775624 · Radiation Oncology Physician · Duarte, CA
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephanie Yoon, M.D. is a Radiation Oncology Physician provider in Duarte, CA (NPI 1346775624).
Provider details
- NPI number
- 1346775624
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A158753 (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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,332 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) |
|---|---|---|
| Ct Guidance for Insertion of Radiation Therapy Fields77014 | 279 | $48 |
| Calculation of Radiation Therapy Dose77300 | 266 | $35 |
| Design and Construction of Complex Radiation Treatment Device77334 | 206 | $66 |
| Radiation Treatment Management, 5 Treatment Sessions77427 | 111 | $207 |
| Complex Radiation Therapy Planning77263 | 77 | $181 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 73 | $104 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$175 across 2 records (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
Registry dates
- Enumerated
- 2017-04-25
- Last updated
- 2022-06-29
- Certified
- 2022-06-29
Frequently asked questions
- What is Stephanie Yoon's NPI number?
- Stephanie Yoon's National Provider Identifier (NPI) is 1346775624, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephanie Yoon's specialty?
- Stephanie Yoon is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Stephanie Yoon located?
- Stephanie Yoon's practice location on file with NPPES is 1500 Duarte Rd, Duarte, CA 91010-3012.
- What is Stephanie Yoon's phone number?
- The practice phone number listed in the NPPES registry for Stephanie Yoon is (626) 256-4673.
- Does Stephanie Yoon accept Medicare?
- Stephanie Yoon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephanie Yoon's NPI active?
- Yes — Stephanie Yoon's NPI (1346775624) is active in the NPPES registry as of the last update on 2022-06-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.