David Duc Diep, DO
David Duc Diep is a Family Medicine specialist based in Ontario, CA with over 15 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
David Duc Diep, DO practices as part of a group family medicine physician practice in Ontario, CA. He has been practicing since 2012 — over 15 years. Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family.
At a glance
- Prescribes opioids less than 21% of reporting doctors in California
- Uses generic medications more than 62% of reporting doctors in California
- Virtual visits available — no app or travel required
Older · 1632dNPPES updated 2021-12-03 · verify NPI on CMS · Verify license at Medical Board of California
Contact & Location
Practice Location
2295 S Vineyard Ave Medical Office Building a - Family Medicine, Ontario, CA 91761-7925
How Does This Doctor Compare?
Based on Medicare data, this doctor prescribes opioid pain medications conservatively, favors affordable generic drugs over brand-name ones.
Opioid Rx
↓ Lower = better4.73%
California avg: 5.2 · US avg: 5.1
✓ Higher than most doctors nationally(-0.4 pts)
4.73% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.
Generic Rx
↑ Higher = better89.6%
California avg: 83.3 · US avg: 82.8
✓ Higher than most doctors nationally(+6.8 pts)
Typical range among reporting doctors in CaliforniaHow often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Prescription Recipients
886
Patients prescribed
Prescriptions Written
5,455
Total claims
Total Medicare drug cost: $299k
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.
Patient Reviews
No patient reviews yet. If you've seen David Duc Diep, your feedback helps other patients.
Review PolicyAll feedback is moderated before publishing. We verify reviewer identity where possible and enforce a one-review-per-provider policy. Full guidelines →
Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
15 years in practice
Experienced
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
Taxonomy: 207Q00000X
Mailing address
2295 S Vineyard Ave Mob a - Family Medicine, Ontario, CA 91761-7925
Differs from practice location
Virtual Family Medicine Care With David Duc Diep
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with David Duc Diep for follow-ups, medication reviews, and ongoing care — no travel to Ontario 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 David Duc Diep
Dr. Diep is listed as active in the NPI registry with telehealth listed in Ontario, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (713) 835-6235.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D. See Data Methodology.
Is this your profile?
Verify credentials, update practice details, and manage telehealth.
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 David Duc Diep
Practice Location
2295 S Vineyard Ave Medical Office Building a - Family Medicine, Ontario, CA 91761-7925
Mailing Address
2295 S Vineyard Ave Mob a - Family Medicine, Ontario, CA 91761-7925
This is a provider directory. Contact the office directly to schedule appointments.
Related Providers