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Summary
Dr. Jonathan Leff is an internal medicine physician with extensive experience spanning over four decades in medical practice. He earned his medical degree from the prestigious Perelman School of Medicine at the University of Pennsylvania. Dr. Leff also has specialized training in critical care medicine and pediatrics, allowing him to provide comprehensive care across different patient populations and medical complexities.
Dr. Leff practices in California, with locations in both Simi Valley and Menlo Park. His broad expertise in internal medicine enables him to diagnose and treat a wide range of adult health conditions. The combination of his critical care background and pediatric training provides him with unique skills in managing both routine healthcare needs and more complex medical situations that require specialized attention.
Dr. Leff practices in California, with locations in both Simi Valley and Menlo Park. His broad expertise in internal medicine enables him to diagnose and treat a wide range of adult health conditions. The combination of his critical care background and pediatric training provides him with unique skills in managing both routine healthcare needs and more complex medical situations that require specialized attention.
Overview based on verified provider data
Quick Facts
- 42 years of experience
- University Of Pennsylvania School Of Medicine
- 4 specialties
- 3 areas of expertise
- 4 board certifications
- 2 office locations
- Male
Office Locations
Dr. Jonathan Andrew Leff has 2 locationsCompare with Similar Doctors
 |  |  |  |
| Dr. Jonathan Andrew Leff, MD | Karthikeyan Viswanathan, DO | Dr. Alaa Hajal, MD | Dr. Nima Ghadimi, MD |
| Internal Medicine | Internal Medicine | Internal Medicine | Internal Medicine |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | |
| 42 Years of Experience | 12 Years of Experience | 15 Years of Experience | 29 Years of Experience |
| No Virtual Visit Option | Virtual Visit Available | Virtual Visit Available | Virtual Visit Available |
| Speaks English, Tamil | Speaks English, Spanish | ||
| Simi Valley , CA | Palo Alto , CA | Diamond Bar , CA | Scottsdale , AZ |
| Med School: University Of Pennsylvania School Of Medicine | Med School: Bassett Medical Center - Cooperstown, New York | Med School: University Of Damascus Faculty Of Medicine | Med School: Univ Iberoamericana Unibe Santo Domingo |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. Jonathan Andrew Leff
Be sure to verify insurance information directly with your doctor's office, as it may undergo frequent changes.
Medical Specialties
Dr. Jonathan Andrew Leff has the following 4 specialties
Specialty Expertise
Dr. Jonathan Andrew Leff has the following 3 areas of expertise
Certifications, License, & Education
42 Years Experience
Education & Training
Medical School
Graduated from University Of Pennsylvania School Of Medicine and Perelman School Of Medicine At University Of Pennsylvania in 1984.
NPI Number
Dr. Leff's NPI number is 1538407721.
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Frequently Asked Questions
- Does Dr. Jonathan Leff accept virtual/telehealth appointments?
- Dr. Jonathan Leff has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
- Does Dr. Jonathan Leff accept my insurance?
- You can see the insurance plans that Dr. Jonathan Leff accepts on their Vitals profile.
- How can I make an appointment with Dr. Jonathan Leff?
- You can find contact information for Dr. Jonathan Leff here on Vitals.
- Where is Dr. Jonathan Leff's office located?
- Dr. Jonathan Leff's office is located at 678 Rustic Hills Dr, Simi Valley, CA, 93065.
- Is Dr. Jonathan Leff accepting new patients?
- Dr. Jonathan Leff has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
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