Byung Don Ahn, MD
Cardiovascular Disease Internal Medicine
Byung Don Ahn is a Cardiovascular Disease Internal Medicine specialist based in Upland, CA with over 48 years of clinical experience. Offers virtual telehealth visits.
Patients across CA can see Byung Don Ahn, MD in person in Upland or via virtual visit — no travel required. With 48+ years of experience, he has been practicing in the Upland area. CMS Medicare data shows his patients commonly have hypertension, high cholesterol, and arthritis.
Older · 4686dNPPES updated 2013-07-24 · verify NPI on CMS · Verify license at Medical Board of California
Contact & Location
Practice Location
1382 E Foothill Blvd, Upland, CA 91786-4014
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 Arthritis.
High blood pressure — a leading risk factor for heart disease and stroke
Elevated cholesterol or triglycerides that increase heart disease risk
Joint inflammation causing pain, swelling, and stiffness
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
A condition where the body cannot properly regulate blood sugar levels
Gradual loss of kidney function over time, often linked to diabetes or hypertension
An irregular, often rapid heartbeat that increases the risk of stroke
The heart cannot pump blood efficiently enough to meet the body's needs
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
Patient Reviews
No patient reviews yet. If you've seen Byung Don Ahn, 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.
48 years in practice
Senior practitioner
Cardiologists specialize in diagnosing and treating heart and blood vessel conditions including coronary artery disease, heart failure, arrhythmias, valve disorders, and hypertension. They perform diagnostic procedures such as echocardiograms, stress tests, and cardiac catheterization.
Taxonomy: 207RC0000X
Virtual Cardiovascular Disease Care With Byung Don Ahn
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Byung Don Ahn for blood pressure monitoring, cholesterol management, arthritis follow-ups — no travel to Upland required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes.
Frequently Asked Questions
Common questions about Byung Don Ahn
Dr. Ahn is listed as active in the NPI registry with telehealth listed in Upland, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (909) 982-6500.
Sourced from CMS NPPES · OIG LEIE · CMS Physician Comparator. 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 Byung Don Ahn
This is a provider directory. Contact the office directly to schedule appointments.
Related Providers
Cardiovascular Disease Internal Medicine in CA
See allYzhar Charuzi, M.D
Los Angeles, CA
Robert a Quint, MD
San Jose, CA
William J Mandel, M.D.
Beverly Hills, CA