Yi-Jen Chen, MD
NPI 1972698868 · Radiation Oncology Physician · Duarte, CA
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Yi-Jen Chen, MD is a Radiation Oncology Physician provider in Duarte, CA (NPI 1972698868).
Provider details
- NPI number
- 1972698868
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A69910 (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
19 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
998 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 | 390 | $48 |
| Calculation of Radiation Therapy Dose77300 | 135 | $35 |
| Radiation Treatment Management, 5 Treatment Sessions77427 | 82 | $207 |
| Design and Construction of Complex Radiation Treatment Device77334 | 79 | $66 |
| Complex Radiation Therapy Planning77263 | 51 | $181 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 46 | $70 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$214 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
- 2006-10-04
- Last updated
- 2020-11-23
- Certified
- 2020-11-23
Frequently asked questions
- What is Yi-Jen Chen's NPI number?
- Yi-Jen Chen's National Provider Identifier (NPI) is 1972698868, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Yi-Jen Chen's specialty?
- Yi-Jen Chen is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Yi-Jen Chen located?
- Yi-Jen Chen's practice location on file with NPPES is 1500 E Duarte Rd, Duarte, CA 91010.
- What is Yi-Jen Chen's phone number?
- The practice phone number listed in the NPPES registry for Yi-Jen Chen is (626) 359-8111.
- Does Yi-Jen Chen accept Medicare?
- Yi-Jen Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Yi-Jen Chen's NPI active?
- Yes — Yi-Jen Chen's NPI (1972698868) is active in the NPPES registry as of the last update on 2020-11-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.