
Jon Stephen Portnoff, MD
Cardiology
Highlights
Age Groups Seen
- Adult 21-65
- Older Adult >65
Languages
- English
Gender
MaleAbout Jon Stephen Portnoff
Provider Type
Physician
Locations
- Heart & Vascular: Adventist Health
- 115 Hospital Drive, Ukiah, CA 95482
- Get Directions
- phone: 707-463-2400
Expertise
Education
American University of the Caribbean
Medical SchoolLoma Linda University School of Medicine
Fellowship ProgramMorristown Memorial Hospital
Internship ProgramAurora Sinai Medical Center
Internship ProgramAurora Sinai Medical Center
Residency ProgramInsurance
- Adventist Health Employee Health/Incentive Health
- Aetna
- AH Employee/ Incentive Health
- Anthem Blue Cross
- Blue Shield
- Cigna
- Galaxy
- HealthNet
- HealthSmart
- Medi-cal ORP1
- Medical ORP
- Medicare Part B
- Medicare Railroad
- Medicare RR
- Multiplan1
- Network by Design
- Partnership (Under Hospital TIN)
- Partnership Health Plan
- Tricare
- TriWest
- UHC
- Western Growers
Ratings & Reviews
4.9 out of 5
149 ratings, 30 reviewsThe provider star rating is calculated using patient responses to the five care provider questions in our patient satisfaction survey. Below you can see the provider’s star rating and the number of his or her patients who have provided feedback.
- 5 out of 5 starsReviewed on 9/26/2025
Dr. Portnoff professional, skilled and caring
- 5 out of 5 starsReviewed on 9/8/2025
Dr Portnoff is always professional, kind and caring. He always listens to my questions and answers them fully. He is very patient and I never feel rushed. He is an excellent physican!
- 5 out of 5 starsReviewed on 8/13/2025
Dr. Portnoff always listens and is very present in the conversation.
- 5 out of 5 starsReviewed on 8/9/2025
Love that he listens and advises you knows his stuff.
- 5 out of 5 starsReviewed on 7/31/2025
Dr Portnoff is knowledgeable, kind, and listens well. Appreciative of his care
- 5 out of 5 starsReviewed on 7/11/2025
Dr Portnoff was very good and I would easily recommend d him to an acquaintance.
- 5 out of 5 starsReviewed on 7/3/2025
Love Dr Portnoff
- 5 out of 5 starsReviewed on 7/3/2025
Very nice visit and discussion with Dr. Portnoff.
- 5 out of 5 starsReviewed on 6/26/2025
Love Dr Portnoff
- 5 out of 5 starsReviewed on 6/26/2025
Dr. Portnoff is a patient listener.
- 5 out of 5 starsReviewed on 6/23/2025
Very nice asked good questions,listened to me very carefully never seemed rushed
- 5 out of 5 starsReviewed on 5/30/2025
Dr Portnoff is great recommend him to everybody
- 5 out of 5 starsReviewed on 5/20/2025
Dr. Portnoff should never retire! He is the bomb! I mean that in a good way
- 5 out of 5 starsReviewed on 5/7/2025
Dr. Portnoff is above and beyond! Very professional.
- 5 out of 5 starsReviewed on 4/15/2025
I'm so relieved of my health concern after the detail explanation from the Doctor. I'm so happy and satisfied with the caring and concerns that provided by the doctor. He is super nice, friendly and awesome!
- 5 out of 5 starsReviewed on 3/19/2025
Excellent experience
- 5 out of 5 starsReviewed on 3/14/2025
Easy to talk to
- 5 out of 5 starsReviewed on 3/13/2025
Everything went well !
- 5 out of 5 starsReviewed on 3/6/2025
Dr Portnoff is wonderful. He listens to you and talks to you not down at you. Best doc in AH hands down
- 5 out of 5 starsReviewed on 2/11/2025
I was able to share all my concerns and questions.
- 5 out of 5 starsReviewed on 2/9/2025
I feel Dr. Portnoff is always present and cares
- No RatingReviewed on 2/1/2025
Have not actually had the appointment yet, did have very good help setting it up.
- 5 out of 5 starsReviewed on 12/8/2024
Dr. Portnoff is kind, attentive and well versed in cardiac issues. While this was a six month check up, he is through in his questioning and responds with informative explanations.
- 5 out of 5 starsReviewed on 11/16/2024
Dr. Portnoff is always very informative and very nice
- 5 out of 5 starsReviewed on 11/15/2024
Dr. Portnoff is not only a very good physician, but a wonderful human being. He is very attentive in conversations and very compassionate. I felt that I was being taken care of by a good friend.
- 5 out of 5 starsReviewed on 11/9/2024
Dr Portnoff cares about people and me
- 5 out of 5 starsReviewed on 11/6/2024
The Dr. Has been very professional and has shown me great empathy and understanding caring for my illness. He has been instrumental in my getting the care I need and I will continue to recommend him to others in need.
- 5 out of 5 starsReviewed on 11/1/2024
Answers all questions and presents needed treatment in an understandable manner.We already have recommended to others.
- 5 out of 5 starsReviewed on 10/24/2024
Dr. Portnoff is incredible he is knowledgeable, always answers any of my questions and concerns, explains everything so that I understand my questions I'm blessed to be a patient of Dr. Portnoff
- 5 out of 5 starsReviewed on 10/24/2024
Dr portnoff is the best Dr I have ever seen