John Chon, D.O.
NPI 1184691644 · Emergency Medicine Physician · Covina, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Chon, D.O. is a Emergency Medicine Physician provider in Covina, CA (NPI 1184691644).
Provider details
- NPI number
- 1184691644
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 20A9192 (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
20 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
580 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 131 | $187 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 123 | $9 |
| Critical Care, First 30-74 Minutes99291 | 123 | $231 |
| Electrocardiogram (ecg) 1 to 3 Leads With Review By Physician Only93042 | 115 | $7 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 65 | $129 |
| Smoking and Tobacco Use Intensive Counseling, 4-10 Minutes99406 | 12 | $13 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 89 | 88 |
| Prednisone | 84 | 83 |
| Ibuprofen | 76 | 75 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 46 | 46 |
| Azithromycin | 41 | 41 |
| Clindamycin Hcl | 39 | 37 |
| Ondansetron Hcl | 38 | 38 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$684 across 20 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
- 2006-03-03
- Last updated
- 2024-10-25
- Certified
- 2023-05-14
Frequently asked questions
- What is John Chon's NPI number?
- John Chon's National Provider Identifier (NPI) is 1184691644, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Chon's specialty?
- John Chon is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Chon located?
- John Chon's practice location on file with NPPES is 210 W San Bernardino Rd, Covina, CA 91723-1515.
- What is John Chon's phone number?
- The practice phone number listed in the NPPES registry for John Chon is (626) 375-1935.
- Does John Chon accept Medicare?
- John Chon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Chon's NPI active?
- Yes — John Chon's NPI (1184691644) is active in the NPPES registry as of the last update on 2024-10-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.