Chien-Shing Chen, M.D.
NPI 1073542692 · Medical Oncology Physician · Loma Linda, CA
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chien-Shing Chen, M.D. is a Medical Oncology Physician provider in Loma Linda, CA (NPI 1073542692).
Provider details
- NPI number
- 1073542692
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A66192 (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
461 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 199 | $97 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 123 | $66 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 53 | $93 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 48 | $126 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 21 | $49 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Enzalutamidebrand: Xtandi | 82 | — |
| Prednisone | 57 | 11 |
| Abiraterone Acetate | 45 | — |
| Apalutamidebrand: Erleada | 36 | — |
| Acyclovir | 32 | — |
| Ondansetron Hcl | 31 | 15 |
| Dexamethasone | 28 | — |
| Famotidine | 27 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$808 across 5 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
- 2006-07-03
- Last updated
- 2008-07-16
Frequently asked questions
- What is Chien-Shing Chen's NPI number?
- Chien-Shing Chen's National Provider Identifier (NPI) is 1073542692, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chien-Shing Chen's specialty?
- Chien-Shing Chen is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Chien-Shing Chen located?
- Chien-Shing Chen's practice location on file with NPPES is 11370 Anderson St, Loma Linda, CA 92354-3450.
- What is Chien-Shing Chen's phone number?
- The practice phone number listed in the NPPES registry for Chien-Shing Chen is (909) 558-2481.
- Does Chien-Shing Chen accept Medicare?
- Chien-Shing 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-Shing Chen's NPI active?
- Yes — Chien-Shing Chen's NPI (1073542692) is active in the NPPES registry as of the last update on 2008-07-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.