
Highlights
Age Groups Seen
- Adults
- Adults Over 65
Languages
- English
Gender
MaleAffiliations
- Hackensack Meridian Medical Group
- Hackensack University Medical Center

About H Mark Denson
Dr. Denson provides care to patients with hypertension, elevated cholesterol, coronary artery disease, heart failure, and arrhythmias. He takes pride in having long-standing empathetic relationships with his patients. He has a special interest in evaluating and treating the cardiovascular issues related to cancer.
Learn more about our practice.
Expertise
Education
Perelman School Of Medicine At The University Of Pennsylvania
Medical EducationMontefiore Medical Center
Fellowship, Cardiology, 1989Montefiore Medical Center
Residency, Internal Medicine, 1989Montefiore Medical Center
Internship, Internal Medicine, 1987Board Certifications
Cardiovascular Disease
American Board of Internal Medicine, 1989Internal Medicine
American Board of Internal Medicine, 1986Insurance
- Aetna
- Aetna Better Health
- Amerihealth
- Cigna
- Clover Health
- Fidelis Care
- Horizon Blue Cross Blue Shield of New Jersey (Horizon BCBSNJ)
- Horizon Blue Cross Blue Shield of New Jersey (Horizon NJ Health)
- Karna WTC
- MagnaCare
- Medicaid
- Medicare
- MultiPlan
- Oxford Health Plans
- QualCare
- Railroad Medicare
- United Healthcare (UHC)
- UnitedHealthcare (UHC) Medicare
- Wellpoint
Ratings & Reviews
5 out of 5
597 ratings, 135 reviewsThe Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.
- 5 out of 5 starsReviewed on 3/21/2025
I have been dealing with Dr. Denson's office for many, many years and it is always a pleasant experience. His office staff is great. He is a wonderful and concerned doctor and I have been very pleased all these years. I hope to continue to be pleased in his new office. Thank you.
- 5 out of 5 starsReviewed on 3/18/2025
Always very GOOD!!!!
- 5 out of 5 starsReviewed on 3/17/2025
Dr. Denson is always a caring and knowledgeable physician. I have been a patient for many years and I feel he has done a great job guiding me through the journey of aging. Highly recommend him.
- 5 out of 5 starsReviewed on 3/10/2025
Dr. Denson was a wonderful, understanding, intelligent person about my problem and I would recommend him to anybody and everybody.
- 5 out of 5 starsReviewed on 2/26/2025
My favorite Doctor. I'm always treated professionally. I've recommended Dr Denson to friends and family.And I have to add,his referral's to other Doctors were outstanding.
- 5 out of 5 starsReviewed on 2/24/2025
Dr. Denson is an extremely knowledgeable and dedicated physician. He has always returned my calls within an hour. I never wait for my appointment. He is a great listener and has given me consistently great advice and care.
- 5 out of 5 starsReviewed on 2/24/2025
As usual, Dr. Denson spent time with me and listened carefully to any questions I had. I have recommended him to several of my friends.
- 5 out of 5 starsReviewed on 2/21/2025
He was an excellent doctor who was very friendly and helpful with giving me information for the reason I was sent to his office
- 5 out of 5 starsReviewed on 2/19/2025
I have been with Doctor Denson for many, many years. He is tops and so is his staff
- 5 out of 5 starsReviewed on 2/19/2025
Dr. Denson answers all my questions and he even discussed some concerns on my bloodwork. He recommended I contact my Nephrologist to schedule an office visit which I will do. He shows real concern for his patients well being. My husband is also his patient and thinks the world of Dr. Denson as well.
- 5 out of 5 starsReviewed on 2/14/2025
The office staff is pleasant and Dr. Denson is as nice a person and as great a cardiologist as anyone can ask for. He is attentive and diagnostician who does not alarm but you know when he thinks something is important.
- 5 out of 5 starsReviewed on 2/14/2025
Dr Denson is a fantastic doctor
- 5 out of 5 starsReviewed on 2/7/2025
Always listens and explain.
- 5 out of 5 starsReviewed on 2/3/2025
Very good meeting with a new (for me) specialist provider. Absolutely on-time, efficient, and compassionate.
- 5 out of 5 starsReviewed on 1/24/2025
I'm very satisfied with Dr. Denson. He has always given me satisfaction and answered any questions I ever had, and he spends enough time with me so I feel comfortable, and I feel much better after I talk to him. Thank you.
- 5 out of 5 starsReviewed on 1/24/2025
Dr. Denson is a terrific doctor and we appreciate him being our main doctor.
- 5 out of 5 starsReviewed on 1/23/2025
Dr Denson is very consistent. Runs an excellent office is always on time and always reviews my med history before he comes in. Very easy to deal with. A+++
- 5 out of 5 starsReviewed on 1/23/2025
Dr Denson is a excellent doctor
- 5 out of 5 starsReviewed on 1/22/2025
Very helpful and courteous
- 5 out of 5 starsReviewed on 1/22/2025
Dr. Denson is an excellent and caring physician.
- 5 out of 5 starsReviewed on 1/20/2025
Always a pleasure
- 5 out of 5 starsReviewed on 1/20/2025
Dr Denson is an empathic professional doctor with ability to inspire confidence in his patients
- 5 out of 5 starsReviewed on 1/16/2025
Dr Denson is a complete professional, as was his staff. I would recommend him highly.
- 3 out of 5 starsReviewed on 1/8/2025
Hi, I've been a patient of Dr. Denson's for about 20 years and also my family. He has always been truthful and honest and helpful. And I've had some major losses in my family and he has always been there for me. And yes, I would recommend him to anyone. Thank you.
- 5 out of 5 starsReviewed on 1/6/2025
Dr. Denson always listens to me and then explains what has happened or what changes need to be made to maintain my health. Feel confident when I walk out that I have received a great examination and I have learned more about my situation than I knew before I visited. I also like that he has such a calm demeanor and he doesn't rush you in and out. One of my favorite Doctors.
- 5 out of 5 starsReviewed on 1/6/2025
Dr Denson continues to be AWESOME!
- 5 out of 5 starsReviewed on 12/31/2024
Dr Denson is great
- 5 out of 5 starsReviewed on 12/30/2024
Excellent
- 5 out of 5 starsReviewed on 12/23/2024
Dr. Denson AND his office staff are the BEST.
- 5 out of 5 starsReviewed on 12/16/2024
All my questions and concerns were answered. I have the utmost confidence in this provider.
- 5 out of 5 starsReviewed on 12/16/2024
Very pleasant experience with doctor and all associates.
- 5 out of 5 starsReviewed on 12/13/2024
BEST EVER
- 5 out of 5 starsReviewed on 12/13/2024
My visits to this healthcare provider and staff are always professional and organized. I feel confident
- 5 out of 5 starsReviewed on 12/10/2024
My visit with DR Denson was very satisfactory.
- 5 out of 5 starsReviewed on 12/9/2024
Approachable, professional, and friendly.
- 5 out of 5 starsReviewed on 12/4/2024
Always very nice and listens well!! GREAT DOCTOR!!
- 5 out of 5 starsReviewed on 12/3/2024
I feel that Dr. Denson is a very nice man. He seems concerned. I think he knows what he's doing. That's my opinion. Thank you.
- 4 out of 5 starsReviewed on 11/26/2024
Office is dated, cramped and smells damp. Office staff are always changing, and are less than competent. The office situation and staff has been an ongoing problem, one that has continued to deteroriate. Unfortunatley, this seems to be typical of HUMC offices. Who is in charge, and watching the various locations?
- 5 out of 5 starsReviewed on 11/21/2024
Dr. Denson was very nice and helped answer many of the questions. Thank you!
- 5 out of 5 starsReviewed on 11/21/2024
It was fine.
- 5 out of 5 starsReviewed on 11/19/2024
Very good
- 5 out of 5 starsReviewed on 11/15/2024
Dr. Denson is extremely attentive and empathetic.
- 5 out of 5 starsReviewed on 11/15/2024
Dr. Denson is excellent. I would recommend him to anybody at any time.
- 5 out of 5 starsReviewed on 11/12/2024
Dr. Denson on every visit has shown careful consideration to my health issues and has always made me feel very well cared for medicallly. One great caring doctor.
- 5 out of 5 starsReviewed on 11/11/2024
Always a good visit. Explained everything.
- 5 out of 5 starsReviewed on 11/8/2024
Awesome
- 5 out of 5 starsReviewed on 11/8/2024
Office management was spectacular and provided superb support!
- 5 out of 5 starsReviewed on 11/7/2024
Dr Denson is an excellent, caring professional. Highly recommend him.
- 5 out of 5 starsReviewed on 11/7/2024
Dr. Denson is the type of practitioner that today's younger practitioners should aspire to be.
- 5 out of 5 starsReviewed on 11/5/2024
Dr.DENSON ALWAYS DOES A GOOD JOB OF KEEPING UP TO DATE ON MY HEALTH
- 5 out of 5 starsReviewed on 10/28/2024
excellent as always
- 5 out of 5 starsReviewed on 10/17/2024
Dr. and his staff are professional, yet friendly!
- 5 out of 5 starsReviewed on 10/17/2024
Very good care, same for office staff.
- 5 out of 5 starsReviewed on 10/17/2024
Excellent doctor; have recommended his practice to friends......
- 5 out of 5 starsReviewed on 10/16/2024
Dr Denson is the best!
- 5 out of 5 starsReviewed on 10/15/2024
Always a pleasure seeing Dr. Denson. He has a terrific manner which put you at ease.
- 5 out of 5 starsReviewed on 10/11/2024
Dr Denson is the best. Calm, caring and a great doctor
- 5 out of 5 starsReviewed on 10/7/2024
Everything went very well
- 5 out of 5 starsReviewed on 10/7/2024
The fact that you always see the doctor at your appointed time. Scheduling in his office goes very smoothly. The staff is to be commended for their professionalism.
- 5 out of 5 starsReviewed on 10/7/2024
The doctor and staffs are very nice and helpful
- 5 out of 5 starsReviewed on 10/3/2024
Dr. Denson is the consummate professional. He is a leader in cardiology and treats me as an individual. He thoroughly explains the EKG and blood test results.
- 5 out of 5 starsReviewed on 9/26/2024
All went well I honestly felt better when I left the office
- 5 out of 5 starsReviewed on 9/25/2024
I feel that the prisoner is very old, he is a good doctor for me, thank you.
- 5 out of 5 starsReviewed on 9/25/2024
Overall it was a wonderful experience, the staff was courteous, professional and friendly, the doctor was professional, caring, and knowledgeable. I was very nervous at first he answered all my questions and made me feel comfortable and at ease.
- 5 out of 5 starsReviewed on 9/13/2024
Professional and caring.
- 5 out of 5 starsReviewed on 9/11/2024
Dr. Denson is in a Class above First. He's T E R R I F I C
- 5 out of 5 starsReviewed on 9/11/2024
The BEST!
- 5 out of 5 starsReviewed on 9/10/2024
Dr Denson is calming and extremely knowledgeable.. he's a great doctor
- 5 out of 5 starsReviewed on 9/10/2024
Hard to get through on the phone to make an appointment
- 5 out of 5 starsReviewed on 9/9/2024
Denson continually runs an efficient office operation with a friendly staff. He is a pro who is current with the latest med info. A+++
- 5 out of 5 starsReviewed on 8/27/2024
Dr. Denson is outstanding, but the office staff keeps changing except for one person. Current office staff limited at best, not very professional nor do they understand customer service. Facility is dated, stinks and in need of major face-lift.
- 5 out of 5 starsReviewed on 8/21/2024
Dr Denson always takes as much time with you as needed listens makes you feel relaxed. Great doctor.
- 5 out of 5 starsReviewed on 8/20/2024
Dr Denson is knowledgeable, kind, efficient and drew blood from my arm with ease I always feel comfortable with him
- 5 out of 5 starsReviewed on 8/19/2024
Dr Denson is phenomenal
- 5 out of 5 starsReviewed on 8/16/2024
DR. DENSON IS A VERY RARE PERSON! HE is an EXCELLENT DOCTOR! HE cares about his patients and it SHOWS!!
- 5 out of 5 starsReviewed on 8/15/2024
Second visit with this provider. I was very satisfied. Listened carefully to me, answered my questions fully, promptly called me when I asked to review test results. Low keyed, friendly manner.
- 5 out of 5 starsReviewed on 8/14/2024
Yeah, I just want to say that Dr. Denson is a great provider, a great cardiologist, and I highly recommend him to everybody that I'm in contact with. He reassures you, he knows what he's doing, and his office staff is wonderful. Thank you.
- 5 out of 5 starsReviewed on 8/14/2024
I would recommend Dr. Denson to my friends and family. Both my husband and I are his patients and he is the best!
- 5 out of 5 starsReviewed on 8/6/2024
Dr. Denson and his entire staff are fantastic!!
- 5 out of 5 starsReviewed on 8/5/2024
Dr. Denson and the whole staff are very nice!
- 5 out of 5 starsReviewed on 8/5/2024
Awesome!!!!!
- 5 out of 5 starsReviewed on 8/2/2024
IF YOU NEED A HEART DOCTOR THIS IS THE DOCTOR TO SEE DOCTOR DENSON
- 5 out of 5 starsReviewed on 8/1/2024
Dr. Denson has always been nothing but professional and helpful. I have been with him for over 14 years. I have also recommended him to others who have gone to him now. The staff is consistently helpful and friendly.
- 5 out of 5 starsReviewed on 8/1/2024
Mark Denson is a great Doctor I have been going to him for over 30 years that says it All.
- 5 out of 5 starsReviewed on 8/1/2024
This is a wonderful office. Well run and everyone is so nice. Dr. denson is the best cardiologist in Hackensack.
- 5 out of 5 starsReviewed on 7/26/2024
Dr Denson was concerned and had arranged an earlier appointment for me. EKG was normal, but we still had a good conversation, covering health related items besides the heart.
- 5 out of 5 starsReviewed on 7/22/2024
Dr. Denson was very compassionate and listened carefully to everything I asked. And he also offered some suggestions. So I really am coming back to him in a few months. Thank you.
- 5 out of 5 starsReviewed on 7/17/2024
Everyone in the office was exceptionally nice.
- 5 out of 5 starsReviewed on 7/17/2024
Dr. Denson is wonderful. He's courteous, on point and always up to date with what is beneficial to my health.
- 5 out of 5 starsReviewed on 7/15/2024
Dr.DENSON He is an outstanding doctor and a very pleasant person.THE BEST.
- 5 out of 5 starsReviewed on 6/28/2024
Always appreciate on time appts, kindness Dr. Denson shows and particularly appreciate his calm demeanor.
- 5 out of 5 starsReviewed on 6/27/2024
Dr. Mark Denson is a credit to the medical profession. His staff is friendly and efficient. Dr. Denson has the gift of making each of his patients feel as comfortable as possible and spends time doing so. I appreciate having him as my Doctor. Thank you
- 5 out of 5 starsReviewed on 6/25/2024
Very knowledgeable Doctor Who shared his knowledge in a way that was easy to understand! Highly recommend
- 5 out of 5 starsReviewed on 6/18/2024
Dr Denson always is on time with your appointment and is a great listener. My favorite doctor to go to. He respects your time too!
- 5 out of 5 starsReviewed on 6/18/2024
Terrific Doctor who listens to everything and explains everything. Great guy!
- 5 out of 5 starsReviewed on 6/17/2024
Always a pleasure to visit this provider.
- 5 out of 5 starsReviewed on 5/30/2024
I have always had a positive experience with Dr.Denson. Very caring doctor. I always leave satisfied!
- 5 out of 5 starsReviewed on 5/28/2024
dr denson is a wonderful doctor. professional, informed, a good listener, always explains everything in words i can understand and asks if i have any questions or concerns. he's a keeper!
- 5 out of 5 starsReviewed on 5/24/2024
Dr Denson and his office are well run professionals. In OV after OV he and the office are outstanding performers.
- 5 out of 5 starsReviewed on 5/23/2024
The provider was very helpful and very encouraging. I would recommend him very highly.
- 5 out of 5 starsReviewed on 5/23/2024
Dr is very thorough. Answers all your questions!!Office staff is great!!
- 5 out of 5 starsReviewed on 5/21/2024
I have the utmost confidence in Dr. Denson and I look forward to my next visit because he's taking great care of me.
- 5 out of 5 starsReviewed on 5/17/2024
Dr Denson is very thorough and professional. I have the upmost confidence in him
- 5 out of 5 starsReviewed on 5/16/2024
Dr. Denson is terrific! Listens carefully to my concerns and he has gotten my cholesterol and blood pressure perfectly controlled with the right mix of medications. I am very pleased.
- 5 out of 5 starsReviewed on 5/15/2024
Very Good.
- 5 out of 5 starsReviewed on 5/14/2024
Excellent doctor. Efficient staff.
- 5 out of 5 starsReviewed on 5/13/2024
The doctor was most compassionate, understanding, answered all my questions, most pleased with his services.
- 5 out of 5 starsReviewed on 5/13/2024
Dr. Denson couldn't have been more thorough, kind, and thoughtful. He listened to all my concerns and answered all my questions. Dr. Denson has cared for my family for decades and we're all so grateful for him.
- 5 out of 5 starsReviewed on 5/9/2024
Timely, pleasant and efficient.
- 5 out of 5 starsReviewed on 5/7/2024
I was pleased with my appt. results
- 5 out of 5 starsReviewed on 5/7/2024
Excellent care, communication and office staff.
- 5 out of 5 starsReviewed on 5/2/2024
Everything was good.
- 5 out of 5 starsReviewed on 5/2/2024
Very good......always a helpful visit. Staff and Doctor are pleasant and courteous.
- 5 out of 5 starsReviewed on 5/2/2024
Dr Denson is so kind and patient. He is very understanding and gives great advice !
- 5 out of 5 starsReviewed on 5/2/2024
My appointment with the doctor was excellent. However, it is impossible reaching his office by phone. I am transferred to a main HUMC number Nd I am either disconnected or I have to wait over 20 minutes before the call is answered so I hang up completely frustrated.
- 5 out of 5 starsReviewed on 5/2/2024
Dr Denson Made me feel comfortable and addressed explained things that were covered in my examination. I would definitely recommend him to someone as a Cardiologist.
- 5 out of 5 starsReviewed on 4/22/2024
prescription was transmitted incorrectly- Dr Denson said he'd renew for a year but it's only renewed for 3 months
- 5 out of 5 starsReviewed on 4/22/2024
My experience was excellent as always. I've been a patient of Dr. Denson for 23 years. Do you think I would continue if I wasn't satisfied with the care?
- 5 out of 5 starsReviewed on 4/19/2024
Dr Denson has been my doctor for several years and has provided me with sound medical advice since becoming a patient. He takes the time to talk and ask questions and makes it comfortable to address my medical needs.
- 5 out of 5 starsReviewed on 4/19/2024
Dr. Denson is a great physician. I could not be happier with my experiences with him.
- 5 out of 5 starsReviewed on 4/18/2024
very happy to be with dr denson
- 5 out of 5 starsReviewed on 4/17/2024
Dr. Denson is the best!
- 5 out of 5 starsReviewed on 4/15/2024
I am thankful that I have this doctor I can trust and does the best job possible with me.
- 5 out of 5 starsReviewed on 4/12/2024
DR. DENSON IS AN EXCELLENT DOCTOR..... HE IS A VERY RARE FIND IN THIS WORLD WE LIVE IN TODAY!!!
- 5 out of 5 starsReviewed on 4/12/2024
Great Doctor
- 5 out of 5 starsReviewed on 4/11/2024
The doctor listens intently to my concerns and always eases my mind. Never diminishes my concerns
- 5 out of 5 starsReviewed on 4/11/2024
Awesome!
- 5 out of 5 starsReviewed on 4/11/2024
Excellent!
- 5 out of 5 starsReviewed on 4/11/2024
Dr Denson was great having and his team performed an EKG and we had a good conversation about our pending colonoscopy. Could not ask for a better visit.
- 5 out of 5 starsReviewed on 4/10/2024
Excellent doctor I have recommended him and his practice to our friends.
- 5 out of 5 starsReviewed on 4/9/2024
First time visiting Dr. Denson was a polite and concerned about me health circumstances. I would recommend him to my family and friends.. not to many doctors seems like they care about your well-being.
- 5 out of 5 starsReviewed on 4/8/2024
Dr Denson is always very respectful and always on time. I would recommend him to anyone.
- 5 out of 5 starsReviewed on 4/8/2024
Been seeing Denson for years and he completely understands my needs
- 5 out of 5 starsReviewed on 4/8/2024
A comfortable and helpful visit.
- 5 out of 5 starsReviewed on 4/4/2024
Dr Denson is an empathic good listener as well as a skilled physician