Ethan Chen, MD
NPI 1073170312 · Family Medicine Physician · Fontana, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ethan Chen, MD is a Family Medicine Physician provider in Fontana, CA (NPI 1073170312).
Provider details
- NPI number
- 1073170312
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A179722 (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
7 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
231 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 87 | $132 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 52 | $172 |
| Automated Urinalysis Test81003 | 22 | $2 |
| Detection Test By Immunoassay With Direct Visual Observation for Influenza Virus87804 | 22 | $16 |
| 2019-Ncov Coronavirus, Sars-Cov-2/2019-Ncov (covid-19), Any Technique, Multiple Types Or Subtypes (includes All Targets), Non-CdcU0002 | 18 | $50 |
| X-Ray of Chest, 2 Views71046 | 17 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 30 | 30 |
| Cephalexin | 27 | 27 |
| Doxycycline Hyclate | 21 | 20 |
| Doxycycline Monohydrate | 16 | 16 |
| Prednisone | 15 | 15 |
| Ofloxacin | 13 | 13 |
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 , 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
- 2019-05-22
- Last updated
- 2022-11-21
- Certified
- 2022-09-23
Frequently asked questions
- What is Ethan Chen's NPI number?
- Ethan Chen's National Provider Identifier (NPI) is 1073170312, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ethan Chen's specialty?
- Ethan Chen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ethan Chen located?
- Ethan Chen's practice location on file with NPPES is 9961 Sierra Ave, Fontana, CA 92335-6720.
- What is Ethan Chen's phone number?
- The practice phone number listed in the NPPES registry for Ethan Chen is (909) 427-2070.
- Does Ethan Chen accept Medicare?
- Ethan Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ethan Chen's NPI active?
- Yes — Ethan Chen's NPI (1073170312) is active in the NPPES registry as of the last update on 2022-11-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.