John Leong, DO
Student in an Organized Health Care Education/Training Program
John Leong, DO specializes in student in an organized health care education/training program, serving patients in Fontana, CA in group practice. He has been in practice for 8+ years. He regularly sees Medicare patients with hypertension, high cholesterol, and diabetes (per CMS claims data).
At a glance
- Prescribes opioids less than 23% of reporting doctors in California
- Virtual visits available — no app or travel required
Older · 1262dNPPES updated 2022-11-21 · verify on CMS
How Does This Doctor Compare?
Based on Medicare data, this doctor prescribes opioid pain medications conservatively.
Opioid Rx
↓ Lower = better4.3%
California avg: 5.2 · US avg: 5.1
✓ Higher than most doctors nationally(-0.8 pts)
4.3% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.
Medicare Patients
17
Unique beneficiaries
Boutique practicePrescription Recipients
79
Patients prescribed
Prescriptions Written
256
Total claims
Total Medicare drug cost: $27k
Percentile rankings compared against 9,360 reporting peers in California.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Hypertension, High Cholesterol, and Diabetes.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+5%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↑ More patients than average (+31%) — a focus area for this doctor
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
8 years in practice
Established
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
Taxonomy: 390200000X
Virtual Student in an Organized Health Care Education/Training Program Care With John Leong
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with John Leong for blood pressure monitoring, cholesterol management, diabetes check-ins — no travel to Fontana required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about John Leong
Dr. Leong is listed as active in the NPI registry with telehealth listed in Fontana, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (833) 574-2273.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Physician Comparator. See Data Methodology.
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Medical Disclaimer: NPI Telehealth is a provider directory for informational purposes only. This page does not constitute medical advice, diagnosis, or treatment recommendations. Provider data is sourced from the CMS NPPES federal registry and public Medicare datasets. NPI Telehealth does not verify clinical qualifications beyond federal records. Data may not reflect real-time availability — always contact the provider's office directly to confirm details before seeking care.
Contact John Leong
Practice Location
9961 Sierra Ave, Fontana, CA 92335-6720
Mailing Address
9961 Sierra Ave, Fontana, CA 92335-6720
This is a provider directory. Contact the office directly to schedule appointments.
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