Andrew Chon
NPI 1528563905 · Emergency Medicine Physician · Colton, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Andrew Chon is a Emergency Medicine Physician provider in Colton, CA (NPI 1528563905).
Provider details
- NPI number
- 1528563905
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 20A17806 (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
8 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
798 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 294 | $183 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 167 | $9 |
| Critical Care, First 30-74 Minutes99291 | 141 | $225 |
| X-Ray of Chest, 1 View71045 | 84 | $9 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 83 | $126 |
| Critical Care, Each Additional 30 Minutes99292 | 29 | $113 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ibuprofen | 19 | 19 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 16 | 16 |
| Prednisone | 14 | 14 |
| Cephalexin | 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 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
Additional practice locations (1)
- 5451 Walnut AveChino, CA 91710-2609Phone: (909) 464-8600
Registry dates
- Enumerated
- 2018-03-27
- Last updated
- 2021-07-15
- Certified
- 2021-07-15
Frequently asked questions
- What is Andrew Chon's NPI number?
- Andrew Chon's National Provider Identifier (NPI) is 1528563905, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Andrew Chon's specialty?
- Andrew Chon is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Andrew Chon located?
- Andrew Chon's practice location on file with NPPES is 400 N Pepper Ave, Colton, CA 92324-1819.
- What is Andrew Chon's phone number?
- The practice phone number listed in the NPPES registry for Andrew Chon is (909) 580-1000.
- Does Andrew Chon accept Medicare?
- Andrew Chon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Andrew Chon's NPI active?
- Yes — Andrew Chon's NPI (1528563905) is active in the NPPES registry as of the last update on 2021-07-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.