4.2
5 Ratings with 3 written Reviews
Summary
Dr. Jon Portnoff specializes in cardiovascular disease and interventional cardiology, with additional expertise in internal medicine. He earned his medical degree from American University of the Caribbean School of Medicine and brings 42 years of experience to his cardiovascular practice. Dr. Portnoff is fluent in both Spanish and English.
Dr. Portnoff practices at Adventist Health Howard Memorial and sees patients at multiple locations throughout Ukiah and Willits, California. He treats patients with heart rhythm disorders like atrial fibrillation and manages high blood pressure in both adults and children. His diagnostic expertise includes performing heart ultrasounds and electrocardiograms to evaluate cardiac function. Patients rate Dr. Portnoff 4.2 out of 5 stars for his cardiovascular care.
Dr. Portnoff practices at Adventist Health Howard Memorial and sees patients at multiple locations throughout Ukiah and Willits, California. He treats patients with heart rhythm disorders like atrial fibrillation and manages high blood pressure in both adults and children. His diagnostic expertise includes performing heart ultrasounds and electrocardiograms to evaluate cardiac function. Patients rate Dr. Portnoff 4.2 out of 5 stars for his cardiovascular care.
Overview based on verified provider data
Quick Facts
- 42 years of experience
- 13 insurance plans accepted
- speaks Spanish, English
- American University Of The Caribbean School Of Medicine
- 3 written reviews
- 3 specialties
- 14 areas of expertise
- 1 hospital affiliation
- 3 office locations
- Male
Patients’ Perspective
- Gave an accurate diagnosis
- Had a good bedside manner
- Spent time with me
Based on patient feedback. Read the reviews
Office Locations
Dr. Jon Stephen Portnoff has 3 locationsAdventist Heart And Vascular Institute
115 Hospital DrUkiah, CA 95482 Tel: (707) 463-2400
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 5:00 pm
Thu8:00 am - 5:00 pm
Fri8:00 am - 12:00 pm
SatClosed
SunClosed
Compare with Similar Doctors
 |  |  |  |
| Dr. Jon Stephen Portnoff, MD | Dr. Raghav Sharma, MD | Dr. Hely Shah | Dr. Sarah Aldord, MD |
| Cardiovascular Disease | Cardiovascular Disease | Oncology | Internal Medicine |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | |
| 42 Years of Experience | 16 Years of Experience | ||
| No Virtual Visit Option | Virtual Visit Available | No Virtual Visit Option | No Virtual Visit Option |
| Speaks Spanish, English | Speaks English, Hindi | Speaks Spanish, English | |
| Ukiah , CA | Winter Park , FL | Ukiah , CA | Ukiah , CA |
| Med School: American University Of The Caribbean School Of Medicine | Med School: New York Medical College | ||
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. Jon Stephen Portnoff
Medical Specialties
Dr. Jon Stephen Portnoff has the following 3 specialties
Specialty Expertise
Dr. Jon Stephen Portnoff has the following 14 areas of expertise
Certifications, License, & Education
42 Years Experience
Dr. Jon Stephen Portnoff holds an expired medical license in the state of California.
Medical License
Medical Doctor with an expired medical license in the state of California that expired in 2026.
Education & Training
Medical School
Graduated from American University Of The Caribbean School Of Medicine in 1984.
NPI Number
Dr. Portnoff's NPI number is 1609874445.
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Frequently Asked Questions
- Is Dr. Jon Portnoff accepting new patients?
- Dr. Jon Portnoff has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
- Where is Dr. Jon Portnoff's office located?
- Dr. Jon Portnoff's office is located at 115 Hospital Dr, Ukiah, CA, 95482.
- Does Dr. Jon Portnoff accept my insurance?
- You can see the insurance plans that Dr. Jon Portnoff accepts on their Vitals profile.
- Which hospitals is Dr. Jon Portnoff affiliated with?
- Dr. Jon Portnoff is affiliated with Adventist Health Howard Memorial.
- Does Dr. Jon Portnoff accept virtual/telehealth appointments?
- Dr. Jon Portnoff has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
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