H Mark Denson, MD
Cardiology

4.9 out of 5,
Accepting new patients
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.
Provider Information
Specialties
Cardiology
Languages
English
Age groups seen
Adults
Adults Over 65
Hospital affiliations
Hackensack Meridian Medical Group
Hackensack University Medical Center
Education
Montefiore Medical Center
Fellowship, Cardiology, 1989
Montefiore Medical Center
Residency, Internal Medicine, 1989
Montefiore Medical Center
Internship, Internal Medicine, 1987
Pennsylvania State University College of Medicine
Medical Education
Certifications
Cardiovascular Disease - American Board of Internal Medicine - 1989
Internal Medicine - American Board of Internal Medicine - 1986
Verified Reviews
The 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.
4.9 out of 5
494 ratings,
101 reviews
7/9/2026
My doctor listens to me and treats me with respect.
7/8/2026
I trust this practice
6/25/2026
Always a pleasure to visit this office and Dr
6/24/2026
Dr Denson is very professional, caring and very pleasant. I feel confident with his recommendations based on his findings and lab results.
6/19/2026
My provider (Dr. Denson) and partners are the best.
6/18/2026
Great
6/17/2026
Lovely experience all around
6/15/2026
SINCE DAY 1 he has been outstanding and he has many outstanding people working for him also….. He gets a 10 out of 10 every time!!
6/14/2026
THE DOCTOR IS GRATE AND THE Staff AS WELL
6/1/2026
Dr. Denson is thorough, caring, listens well, provides excellent patient care
5/31/2026
Dr. Denson made me feel confident and cared for by his words and medical treatment. He also explained things that I needed to know and answered any questions I had in a way that I understood it all.
5/29/2026
Very caring and explained everything regarding visit.
5/28/2026
Dr. Denson is a brilliant and highly practical cardiologist who consistently delivers thoughtful, evidence-based care. He combines superb clinical skills with an excellent bedside manner, making patients feel both confident and at ease. His ability to provide comprehensive medical care ensures that each patient receives thorough, coordinated, and effective treatment.
5/27/2026
Dr Denson is excellent
5/19/2026
As mentioned in my answer to an earlier question I have been under Dr Denson's cardiac care for many years. I trust in his care and knowledge regarding my cardiac health. Please note however that these types of follow up questions should include an option in the answer column for NA (not applicable) because some of the questions may not apply to my visit.
5/18/2026
Professional!
5/9/2026
I see Dr Denson every 4 months . At all times I find him an empathic doctor who listens well . He takes time to answer questions ensuring what he says is correctly understood .
5/7/2026
Just feel very confident in choosing Dr Denson
5/7/2026
I have referred a number of family, friends and neighbors to the practice and have always received outstanding comments after their appointments.
5/6/2026
Pleasure to see!
5/5/2026
Always on time for my appointment. No waiting time.
4/19/2026
Very competent
4/17/2026
Everyone on staff is wonderful.
3/31/2026
Weight loss noted. If weight loss continues over the next 1-2 months imaging studiews will be considered.
3/22/2026
Professional, informative, great bedside manner
2/28/2026
I would recommend anyone to the practice
2/26/2026
very good
2/20/2026
As always, gives you the time to express any questions or needs and clearly explains any concerns.
2/17/2026
Dr. Denson called me to go over the results of my blood work the day after my visit. I have never had a doctor call me to discuss blood work. He knew that I was concerned about my glucose level and wanted to reassure me that everything was ok. He's a gem.
2/17/2026
Love my doctor. Love the staff.
2/13/2026
very professional and caring
2/13/2026
A great experience.
2/10/2026
Great practice
2/8/2026
10 out of 10
1/29/2026
Clean office and friendly staff. Doctor was very patient and kind.
1/28/2026
Great experience
1/23/2026
Dr Denson very knowledgeable , listens, answers questions very personable
1/23/2026
Dr. Denson is very concerned about me as a patient. He looks at my meds to see if he should make a change or not üëç
1/19/2026
Absolutely awesome!
1/17/2026
Very good
1/16/2026
Great Doctor & staff!
1/16/2026
Professional and friendly
1/15/2026
I am treated with care and respect.
1/13/2026
Very good
1/13/2026
Medical guidance is A1.
12/29/2025
Dr Mark Denson is an excellent physician, he is smart, he is savvy, and his presentation is always professional. He knew every bit of information on me since I last saw him, which was 6 months ago. I would highly recommend him to all.
12/26/2025
Very knowledgeable and took time to discuss and explain information neede
12/22/2025
Thank you, very friendly staff and caring. Dr. was great. Spoke so I could understand clearly what needs to be done. Just an overall great bedside manner.
12/19/2025
DR. DENSON is a fantastic DOCTOR AND there should be more like him!! Treats me very well and I appreciate him!!! AS GOOD AS IT GETS.... HE IS!!!?
12/17/2025
Extremely comfortable, and informative. Could not ask for a better appointment.
12/12/2025
I feel confident that Dr. Denson is concerned about his patients health care. He's considerate and professional.
12/9/2025
Wonderful caring physician.
12/9/2025
Dr. Denson is very good at communication. He's very detail oriented. I like that. I am confident I am in good hands. His staff is professional and kind. His techs for my ekgs are lovely. The new location has ample parking and the building and office/waiting room are very nice and clean. I highly recommend Dr. Denson.
12/8/2025
Dr. Denson is the best. I highly respect him. He is worried about your concerns and he's also worried about your health and welfare and I highly recommend him as one of my best cardiologists that I have and I'm lucky to have him. Thank you.
12/5/2025
The nurses that do the BP etc have poor attitudes
12/5/2025
Unfortunately I find the new location of Dr. Denson's office terribly difficult to get to which is why I won't recommend his practice to family and friends. Yes, he needed a new office, but 650 From Rd. would have made more sense so much more convenient for patients.
12/2/2025
Most times my experience has been positive. Dr. Denson is always open to discussing/explaining any questions or concerns that I may have.
12/2/2025
I needed to have an EKG and because I have limited use of my shoulders and arms the nurses were very kind and helped me prepare for the EKG and also assisted me after EKG with getting dressed again. They were very helpful and did so willingly. Thank you - always pleasant when nurses are helpful and kind and considerate.
11/26/2025
Office staff was very polite. Dr. Denson is always a pleasure see.
11/26/2025
The appointment was timely. I arrived early and was taken right away!
11/20/2025
I wish all of my other MD's ran their offices as well as Dr Denson. He consistently performs at a very high level and the staff is courteous and friendly, especially Melissa as well as the brand new receptionist who was very courteous, thanked me when leaving, smiled and was very pleasant. A+++
11/20/2025
Dr. Denson has been my doctor for years. He continually provides information I ask about in a relaxing, friendly manner. Just the best.
11/20/2025
Dr & staff are friendly & caring.
11/19/2025
I had a issue with a nurse in the hallway. As I was waiting to check out, I was standing in front of a open doorway in the hall. As the nurse appeared to want to enter the doorway, I stepped back for her entry. The nurse said " No, move the other way". I looked at her not knowing what she had meant. Her next command was" Step to the other side of the doorway", that I did. The use of the word please and in a different tone would be of a better patient experience. She never entered or looked in the office and continued down the hall. I assume she did not like me standing in front of the open office doorway for some strange reason. The word "please" goes a long way. She needs some coaching in how to talk to people.
11/10/2025
Meeting with Dr. Denson for my semi-annual checkup is always a pleasure.
11/7/2025
Staff was polite.
11/6/2025
Professional staff was healing itself. Glad that the department is in new location not toxic environment as it was in Hackensack. It was long overdue the office relocation.
11/5/2025
Dr Denson is an excellent doctor; he is very knowledgeable, has an excellent rapport, is compassionate, answers questions and listens. I have recommended him to all my friends
11/4/2025
Dr. Denson is a top-notch cardiologist. Best I've had.
11/3/2025
Very happy with Dr. Denson bedside manner and experience.
10/29/2025
I think Dr. Denson is an ultimate professional. He takes care of my needs. He scheduled additional tests that he thought were necessary and I agreed. I will definitely recommend him to all of my friends that ask for a cardiologist.
10/29/2025
Dr Denson has been my provider for over 20 years. He saved my life last week, blood pressure was very high. Excellent doctor .
10/23/2025
My only problem is that I live SO VERY far away from his office. I no longer am able to drive, so I must use an UBER for my visits. This is a problem that my doctor simply cannot rectify... But--I will continue using his great service.
10/16/2025
good
10/15/2025
The telephone system that HUMC is using to confirm appointments is a joke. Whoever selected it should be fired. It calls my phone when I cannot answer and asks me to select "1". When I've called the office to confirm an appointment the computer still calls. In this day and age the fact that the confirmation process is not integrated between the computer and the office disappointing to say the least.
10/14/2025
Healthcare at it's best.
10/6/2025
Dr Denson has helped me with medications for my heart and his advise has helped me avoid other serious health issues. I highly recommend him.
9/29/2025
very disappointed that the office was relocated from Hackensack to Hasbro Heights in a building that is very including into access.
9/29/2025
Love the new location and Dr is the best
9/8/2025
Dr. Denson has excellent communication skills and exhibits a true concern for his patients.
9/4/2025
Extremely happy with Dr Denson
9/3/2025
Always a pleasure to see Dr. Denson. I recommend a friend who is now also a patient.
8/28/2025
staff was excellent. Doctor was very thorough. Highly recommend him.
8/27/2025
My favorite doctor hands down.Dr Denson is always attentive and has a matter of fact approach. I recommended Dr Denson to my wife and she's now a patient.
8/22/2025
I am extremely grateful that Dr. Denson is caring for my health.
8/21/2025
This is my first visit with Dr. Denson, and he listened, and we discussed a lot of other things, and of course I will be going back, and I will recommend him, and I felt very comfortable. He didn't rush me. He gave me all the time I needed, and he screened everything that I asked. I had a page full of questions, being the first time there, and he answered them as best as he could, and I was very happy with the visit. Thank you.
8/21/2025
Everyone is courteous helpful and friendly
8/20/2025
Love new location parking so much better.
8/20/2025
My own fault I didn't have my list of questions complete and when the doctor did call me about my blood work he was explaining some tests that he did that I didn't really understand something about it being hereditary. I would have liked to have gotten a little more information on that. Also would have been nice to get my A1C and it was too late as it was a different tube of blood. The blood draw was a little hurtful, never usually have that with the butterfly. I don't know what kind of what kind of draw this was
8/20/2025
Dr. Denson is a wonderful doctor. He explains things like test results, his exam findings, etc. my husband and I have recommended him to others because we are confident in his abilities and his bedside manner.
8/15/2025
Great doctor. Very caring and calm.
8/14/2025
Dr. Denson and his staff are great.
8/13/2025
is the best doctor, is very concerned, I recommend it to anybody.
8/11/2025
Excellent doctor and kind.
7/29/2025
Dr Denson has always been attentive to my needs and very professional.
7/25/2025
Excellent very thorough and responsive.
7/25/2025
Just refreshing to meet a good doctor!!
7/23/2025
Dr. Denson is always on time and thorough. I highly recommend him always.
7/23/2025
Dr Denson and staff are true professionals.
7/23/2025
Not only was Dr. Denson excellent, but the entire staff as well. The people at the front desk, the nurse or MA who brought me into the room, everybody was excellent. Thank you.
7/21/2025
Dr. Denson has always listened to what my issues are and has helped me. He has been my physician for 20 years and he's my arch to keep. Thank you.
Insurance Coverage
Note:Please contact the practice directly to confirm your health plan is in network.
Aetna
Aetna Better Health
Amerihealth
Cigna
Claritev
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
Oxford Health Plans
QualCare
Railroad Medicare
United Healthcare (UHC)
UnitedHealthcare (UHC) Medicare
Wellpoint
Need a Different Location?
Hackensack Meridian Urgent Care PLUS - Hackensack also offers treatment for urgent medical needs near you.
Provider Information
Specialties
Cardiology
Languages
English
Age groups seen
Adults
Adults Over 65
Hospital affiliations
Hackensack Meridian Medical Group
Hackensack University Medical Center
Education
Montefiore Medical Center
Fellowship, Cardiology, 1989
Montefiore Medical Center
Residency, Internal Medicine, 1989
Montefiore Medical Center
Internship, Internal Medicine, 1987
Pennsylvania State University College of Medicine
Medical Education
Certifications
Cardiovascular Disease - American Board of Internal Medicine - 1989
Internal Medicine - American Board of Internal Medicine - 1986
Verified Reviews
The 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.
4.9 out of 5
494 ratings,
101 reviews
7/9/2026
My doctor listens to me and treats me with respect.
7/8/2026
I trust this practice
6/25/2026
Always a pleasure to visit this office and Dr
6/24/2026
Dr Denson is very professional, caring and very pleasant. I feel confident with his recommendations based on his findings and lab results.
6/19/2026
My provider (Dr. Denson) and partners are the best.
6/18/2026
Great
6/17/2026
Lovely experience all around
6/15/2026
SINCE DAY 1 he has been outstanding and he has many outstanding people working for him also….. He gets a 10 out of 10 every time!!
6/14/2026
THE DOCTOR IS GRATE AND THE Staff AS WELL
6/1/2026
Dr. Denson is thorough, caring, listens well, provides excellent patient care
5/31/2026
Dr. Denson made me feel confident and cared for by his words and medical treatment. He also explained things that I needed to know and answered any questions I had in a way that I understood it all.
5/29/2026
Very caring and explained everything regarding visit.
5/28/2026
Dr. Denson is a brilliant and highly practical cardiologist who consistently delivers thoughtful, evidence-based care. He combines superb clinical skills with an excellent bedside manner, making patients feel both confident and at ease. His ability to provide comprehensive medical care ensures that each patient receives thorough, coordinated, and effective treatment.
5/27/2026
Dr Denson is excellent
5/19/2026
As mentioned in my answer to an earlier question I have been under Dr Denson's cardiac care for many years. I trust in his care and knowledge regarding my cardiac health. Please note however that these types of follow up questions should include an option in the answer column for NA (not applicable) because some of the questions may not apply to my visit.
5/18/2026
Professional!
5/9/2026
I see Dr Denson every 4 months . At all times I find him an empathic doctor who listens well . He takes time to answer questions ensuring what he says is correctly understood .
5/7/2026
Just feel very confident in choosing Dr Denson
5/7/2026
I have referred a number of family, friends and neighbors to the practice and have always received outstanding comments after their appointments.
5/6/2026
Pleasure to see!
5/5/2026
Always on time for my appointment. No waiting time.
4/19/2026
Very competent
4/17/2026
Everyone on staff is wonderful.
3/31/2026
Weight loss noted. If weight loss continues over the next 1-2 months imaging studiews will be considered.
3/22/2026
Professional, informative, great bedside manner
2/28/2026
I would recommend anyone to the practice
2/26/2026
very good
2/20/2026
As always, gives you the time to express any questions or needs and clearly explains any concerns.
2/17/2026
Dr. Denson called me to go over the results of my blood work the day after my visit. I have never had a doctor call me to discuss blood work. He knew that I was concerned about my glucose level and wanted to reassure me that everything was ok. He's a gem.
2/17/2026
Love my doctor. Love the staff.
2/13/2026
very professional and caring
2/13/2026
A great experience.
2/10/2026
Great practice
2/8/2026
10 out of 10
1/29/2026
Clean office and friendly staff. Doctor was very patient and kind.
1/28/2026
Great experience
1/23/2026
Dr Denson very knowledgeable , listens, answers questions very personable
1/23/2026
Dr. Denson is very concerned about me as a patient. He looks at my meds to see if he should make a change or not üëç
1/19/2026
Absolutely awesome!
1/17/2026
Very good
1/16/2026
Great Doctor & staff!
1/16/2026
Professional and friendly
1/15/2026
I am treated with care and respect.
1/13/2026
Very good
1/13/2026
Medical guidance is A1.
12/29/2025
Dr Mark Denson is an excellent physician, he is smart, he is savvy, and his presentation is always professional. He knew every bit of information on me since I last saw him, which was 6 months ago. I would highly recommend him to all.
12/26/2025
Very knowledgeable and took time to discuss and explain information neede
12/22/2025
Thank you, very friendly staff and caring. Dr. was great. Spoke so I could understand clearly what needs to be done. Just an overall great bedside manner.
12/19/2025
DR. DENSON is a fantastic DOCTOR AND there should be more like him!! Treats me very well and I appreciate him!!! AS GOOD AS IT GETS.... HE IS!!!?
12/17/2025
Extremely comfortable, and informative. Could not ask for a better appointment.
12/12/2025
I feel confident that Dr. Denson is concerned about his patients health care. He's considerate and professional.
12/9/2025
Wonderful caring physician.
12/9/2025
Dr. Denson is very good at communication. He's very detail oriented. I like that. I am confident I am in good hands. His staff is professional and kind. His techs for my ekgs are lovely. The new location has ample parking and the building and office/waiting room are very nice and clean. I highly recommend Dr. Denson.
12/8/2025
Dr. Denson is the best. I highly respect him. He is worried about your concerns and he's also worried about your health and welfare and I highly recommend him as one of my best cardiologists that I have and I'm lucky to have him. Thank you.
12/5/2025
The nurses that do the BP etc have poor attitudes
12/5/2025
Unfortunately I find the new location of Dr. Denson's office terribly difficult to get to which is why I won't recommend his practice to family and friends. Yes, he needed a new office, but 650 From Rd. would have made more sense so much more convenient for patients.
12/2/2025
Most times my experience has been positive. Dr. Denson is always open to discussing/explaining any questions or concerns that I may have.
12/2/2025
I needed to have an EKG and because I have limited use of my shoulders and arms the nurses were very kind and helped me prepare for the EKG and also assisted me after EKG with getting dressed again. They were very helpful and did so willingly. Thank you - always pleasant when nurses are helpful and kind and considerate.
11/26/2025
Office staff was very polite. Dr. Denson is always a pleasure see.
11/26/2025
The appointment was timely. I arrived early and was taken right away!
11/20/2025
I wish all of my other MD's ran their offices as well as Dr Denson. He consistently performs at a very high level and the staff is courteous and friendly, especially Melissa as well as the brand new receptionist who was very courteous, thanked me when leaving, smiled and was very pleasant. A+++
11/20/2025
Dr. Denson has been my doctor for years. He continually provides information I ask about in a relaxing, friendly manner. Just the best.
11/20/2025
Dr & staff are friendly & caring.
11/19/2025
I had a issue with a nurse in the hallway. As I was waiting to check out, I was standing in front of a open doorway in the hall. As the nurse appeared to want to enter the doorway, I stepped back for her entry. The nurse said " No, move the other way". I looked at her not knowing what she had meant. Her next command was" Step to the other side of the doorway", that I did. The use of the word please and in a different tone would be of a better patient experience. She never entered or looked in the office and continued down the hall. I assume she did not like me standing in front of the open office doorway for some strange reason. The word "please" goes a long way. She needs some coaching in how to talk to people.
11/10/2025
Meeting with Dr. Denson for my semi-annual checkup is always a pleasure.
11/7/2025
Staff was polite.
11/6/2025
Professional staff was healing itself. Glad that the department is in new location not toxic environment as it was in Hackensack. It was long overdue the office relocation.
11/5/2025
Dr Denson is an excellent doctor; he is very knowledgeable, has an excellent rapport, is compassionate, answers questions and listens. I have recommended him to all my friends
11/4/2025
Dr. Denson is a top-notch cardiologist. Best I've had.
11/3/2025
Very happy with Dr. Denson bedside manner and experience.
10/29/2025
I think Dr. Denson is an ultimate professional. He takes care of my needs. He scheduled additional tests that he thought were necessary and I agreed. I will definitely recommend him to all of my friends that ask for a cardiologist.
10/29/2025
Dr Denson has been my provider for over 20 years. He saved my life last week, blood pressure was very high. Excellent doctor .
10/23/2025
My only problem is that I live SO VERY far away from his office. I no longer am able to drive, so I must use an UBER for my visits. This is a problem that my doctor simply cannot rectify... But--I will continue using his great service.
10/16/2025
good
10/15/2025
The telephone system that HUMC is using to confirm appointments is a joke. Whoever selected it should be fired. It calls my phone when I cannot answer and asks me to select "1". When I've called the office to confirm an appointment the computer still calls. In this day and age the fact that the confirmation process is not integrated between the computer and the office disappointing to say the least.
10/14/2025
Healthcare at it's best.
10/6/2025
Dr Denson has helped me with medications for my heart and his advise has helped me avoid other serious health issues. I highly recommend him.
9/29/2025
very disappointed that the office was relocated from Hackensack to Hasbro Heights in a building that is very including into access.
9/29/2025
Love the new location and Dr is the best
9/8/2025
Dr. Denson has excellent communication skills and exhibits a true concern for his patients.
9/4/2025
Extremely happy with Dr Denson
9/3/2025
Always a pleasure to see Dr. Denson. I recommend a friend who is now also a patient.
8/28/2025
staff was excellent. Doctor was very thorough. Highly recommend him.
8/27/2025
My favorite doctor hands down.Dr Denson is always attentive and has a matter of fact approach. I recommended Dr Denson to my wife and she's now a patient.
8/22/2025
I am extremely grateful that Dr. Denson is caring for my health.
8/21/2025
This is my first visit with Dr. Denson, and he listened, and we discussed a lot of other things, and of course I will be going back, and I will recommend him, and I felt very comfortable. He didn't rush me. He gave me all the time I needed, and he screened everything that I asked. I had a page full of questions, being the first time there, and he answered them as best as he could, and I was very happy with the visit. Thank you.
8/21/2025
Everyone is courteous helpful and friendly
8/20/2025
Love new location parking so much better.
8/20/2025
My own fault I didn't have my list of questions complete and when the doctor did call me about my blood work he was explaining some tests that he did that I didn't really understand something about it being hereditary. I would have liked to have gotten a little more information on that. Also would have been nice to get my A1C and it was too late as it was a different tube of blood. The blood draw was a little hurtful, never usually have that with the butterfly. I don't know what kind of what kind of draw this was
8/20/2025
Dr. Denson is a wonderful doctor. He explains things like test results, his exam findings, etc. my husband and I have recommended him to others because we are confident in his abilities and his bedside manner.
8/15/2025
Great doctor. Very caring and calm.
8/14/2025
Dr. Denson and his staff are great.
8/13/2025
is the best doctor, is very concerned, I recommend it to anybody.
8/11/2025
Excellent doctor and kind.
7/29/2025
Dr Denson has always been attentive to my needs and very professional.
7/25/2025
Excellent very thorough and responsive.
7/25/2025
Just refreshing to meet a good doctor!!
7/23/2025
Dr. Denson is always on time and thorough. I highly recommend him always.
7/23/2025
Dr Denson and staff are true professionals.
7/23/2025
Not only was Dr. Denson excellent, but the entire staff as well. The people at the front desk, the nurse or MA who brought me into the room, everybody was excellent. Thank you.
7/21/2025
Dr. Denson has always listened to what my issues are and has helped me. He has been my physician for 20 years and he's my arch to keep. Thank you.
Insurance Coverage
Note:Please contact the practice directly to confirm your health plan is in network.
Aetna
Aetna Better Health
Amerihealth
Cigna
Claritev
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
Oxford Health Plans
QualCare
Railroad Medicare
United Healthcare (UHC)
UnitedHealthcare (UHC) Medicare
Wellpoint
Similar providers at this location
Call Us to Schedule
551-996-9180
Call Us to Schedule
551-996-9180
Call Us to Schedule
551-996-9180


