Chien Chen, M.D., PH.D.
NPI 1083947717 · Radiation Oncology Physician · La Jolla, CA
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chien Chen, M.D., PH.D. is a Radiation Oncology Physician provider in La Jolla, CA (NPI 1083947717).
Provider details
- NPI number
- 1083947717
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A107522 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
5,074 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 787 | $63 |
| Calculation of Radiation Therapy Dose77300 | 566 | $41 |
| Design and Construction of Complex Radiation Treatment Device77334 | 436 | $79 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 372 | $17 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 323 | $97 |
| Radiation Treatment Management, 5 Treatment Sessions77427 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methylprednisolone | 73 | 47 |
| Tamsulosin Hcl | 17 | — |
| Dexamethasone | 13 | — |
| Gabapentin | 13 | — |
| Omeprazole | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-09-14
- Last updated
- 2012-08-06
Frequently asked questions
- What is Chien Chen's NPI number?
- Chien Chen's National Provider Identifier (NPI) is 1083947717, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chien Chen's specialty?
- Chien Chen is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Chien Chen located?
- Chien Chen's practice location on file with NPPES is 10666 N Torrey Pines Rd, La Jolla, CA 92037-1027.
- What is Chien Chen's phone number?
- The practice phone number listed in the NPPES registry for Chien Chen is (415) 971-9313.
- Does Chien Chen accept Medicare?
- Chien Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chien Chen's NPI active?
- Yes — Chien Chen's NPI (1083947717) is active in the NPPES registry as of the last update on 2012-08-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.