Ada Mercado, MD
Specialties
Cardiovascular Disease
Cardiology
Education & Training
Doctor of Medicine
Ada Mercado, MD
Cardiovascular Disease Specialist with Wellstar since 2010.
Specialties
Cardiovascular Disease
Cardiology
Education & Training
Doctor of Medicine
Office Locations
Expertise
About Ada Mercado, MD
A native of Puerto Rico, Dr. Ada Mercado received her undergraduate degree from InterAmerican University and attended medical school at Pedro Henríquez Ureña. She completed her internal medicine residency in the Mayagüez Medical Center and her cardiovascular disease fellowship at Ponce School of Medicine & Health Sciences St. Luke's Episcopal Hospital. Dr. Mercado then completed an echocardiography fellowship at Tulane and Louisiana State University in New Orleans, LA. She also completed nuclear cardiology training at Emory University in Atlanta.
Dr. Mercado is board-certified in cardiovascular disease. She is a member of the American College of Cardiology and American Echcoardiography Society. Her special interests include general cardiology, transthoracic and transesophageal echocardiogram, and nuclear cardiology.
She joined Wellstar in January 2011 from the Atlanta Heart Center where she was a founding physician in 2002.
Specialties
- Cardiovascular Disease
- Cardiology
Education & Training
- Universidad Nacional Pedro Henriquez Urena
Degree
- Doctor of Medicine
Residency
- Ramon Betances HospitalMayaguez Medical Center
Fellowship
- Emory Healthcare/Emory University Hospital
- LSU Health Sciences Center
- Ponce School of Medicine
Certifications
- National Board of Physicians and Surgeons
Hospital Affiliations
- Wellstar Kennestone Hospital
- Wellstar North Fulton Hospital
- Wellstar Douglas Hospital
- Wellstar Cobb Hospital
Languages spoken
- English
- Spanish
Common Treatments, Conditions, and Procedures
- Atrial Fibrillation (Afib)
- Congestive Heart Failure
- High Blood Pressure
- High Cholesterol
- Stroke
Patient Reviews
Overall patient rating
4.7Based on 541 patient ratings
- I'd recommend this practice to family and friends
-
- I'd recommend this provider to family and friends
-
- Listened to me carefully
-
- Shared the right amount of information
-
- Earned my trust
-
All reviews have been submitted by patients after seeing the provider.For more information about the review system, check out this Learn more about our review system.
Patient Reviews
5
A very professional and great experience, thank you.
January 10, 2026
5
Doctor Mercado is always concerned about my health and wellbeing. She always ask me for my opinion and makes recommendations on what I should be doing to improve my situation. She very knowledgeable and great doctor. I would also like thank CMA Stephanie for her outstanding comment and duty to help me during my visit.
January 10, 2026
5
Good
January 10, 2026
5
Dr. Mercado is an excellent professional who has assisted me and improved my quality of life. I am grateful to have found her.
January 9, 2026
5
Better than most with good service on time pleasant people helpful very clean enjoy going to for visits great location keep up the good work
January 9, 2026
3
I was very satisfied with my doctor. I've been going to her for 15 years now and I was very satisfied.
January 4, 2026
5
Very professional and caring
December 31, 2025
5
From the moment I arrived, the service was incredibly professional. Thanks to all the staff, and especially Dr. Mercado, who made me feel very confident and was extremely professional. Thank you.
December 27, 2025
5
Dr Mercado and her staff are top notch professional and well informed healthcare professionals. They show empathy, concern and compassion in their care giving.
December 19, 2025
5
I really liked Dr. Ada Mercato because when I first saw her, she said, you tell people your cardiologist is Dr. Ada Mercato. And it was perfect timing because I needed approval to sign off for my cataract surgery this afternoon. And my cataract surgery went well. And she gladly signed off. Thank you. Bye.
December 14, 2025
5
It would be nice to do a follow up
December 12, 2025
5
Excellent service and professionalism.
December 11, 2025
3
Get use to the provide rs ways for better understanding!
December 11, 2025
5
The visit was pleasant and relaxing; everyone was very respectful and kind. The doctor was very professional, providing clear and precise information in her instructions. Thank you.
December 11, 2025
4
Staff was friendly. Appt was on time.
December 11, 2025
5
Very caring
December 11, 2025
5
Everything's fine, thank you for your attention.
November 23, 2025
5
I love Dr. Mercado and her staff. They are very thorough and proactive in my health care.
November 22, 2025
5
The staff is very welcoming and kind. Stephanie was my nurse who took my BP and EKG. She was so kind and put me at ease immediately. Dr. Mercado is such a warm and caring person. She comes in with a smile and genuinely shows that she is there for you!
November 20, 2025
2
An hour late, I was given a quick two-minute "check," and then goodbye. I came back to make a new appointment... Totally disappointed!!
November 26, 2025
5
Great and friendly customer service by Dr. Mercado and the nurse. Was happy about the whole experience. Thank you.
November 9, 2025
5
The doctor is excellent, and the support team of nurses and other professionals is outstanding. I love going to her appointments.
November 9, 2025
5
Always have a great experience on my visits.
November 8, 2025
5
Dr. Mercado is a great doctor, as well as being compassionate and taking good care of her patients.
November 7, 2025
5
Excellent service
November 8, 2025
5
Friendly, polite and helpful.
November 6, 2025
5
Very profesional
November 2, 2025
5
I will continue to visit this health provider.
November 1, 2025
5
I felt very comfortable with the doctor, the nurse, and the reception staff. They were very helpful with my insurance paperwork and scheduling new appointments. They were all very kind. I'm very grateful for their willingness to help.
November 1, 2025
5
Office is so organized, friendly, efficient.. Dr. Mercado expresses a special interest in your total well being. She is truly concerned and focused on helping you live a quality life!
October 29, 2025
5
A very professional and great experience, thank you.
January 10, 2026
5
Doctor Mercado is always concerned about my health and wellbeing. She always ask me for my opinion and makes recommendations on what I should be doing to improve my situation. She very knowledgeable and great doctor. I would also like thank CMA Stephanie for her outstanding comment and duty to help me during my visit.
January 10, 2026
5
Good
January 10, 2026
5
Dr. Mercado is an excellent professional who has assisted me and improved my quality of life. I am grateful to have found her.
January 9, 2026
5
Better than most with good service on time pleasant people helpful very clean enjoy going to for visits great location keep up the good work
January 9, 2026
5
Very professional and caring
December 31, 2025
5
From the moment I arrived, the service was incredibly professional. Thanks to all the staff, and especially Dr. Mercado, who made me feel very confident and was extremely professional. Thank you.
December 27, 2025
5
Dr Mercado and her staff are top notch professional and well informed healthcare professionals. They show empathy, concern and compassion in their care giving.
December 19, 2025
5
I really liked Dr. Ada Mercato because when I first saw her, she said, you tell people your cardiologist is Dr. Ada Mercato. And it was perfect timing because I needed approval to sign off for my cataract surgery this afternoon. And my cataract surgery went well. And she gladly signed off. Thank you. Bye.
December 14, 2025
5
It would be nice to do a follow up
December 12, 2025
5
Excellent service and professionalism.
December 11, 2025
5
The visit was pleasant and relaxing; everyone was very respectful and kind. The doctor was very professional, providing clear and precise information in her instructions. Thank you.
December 11, 2025
5
Very caring
December 11, 2025
5
Everything's fine, thank you for your attention.
November 23, 2025
5
I love Dr. Mercado and her staff. They are very thorough and proactive in my health care.
November 22, 2025
5
The staff is very welcoming and kind. Stephanie was my nurse who took my BP and EKG. She was so kind and put me at ease immediately. Dr. Mercado is such a warm and caring person. She comes in with a smile and genuinely shows that she is there for you!
November 20, 2025
5
Great and friendly customer service by Dr. Mercado and the nurse. Was happy about the whole experience. Thank you.
November 9, 2025
5
The doctor is excellent, and the support team of nurses and other professionals is outstanding. I love going to her appointments.
November 9, 2025
5
Always have a great experience on my visits.
November 8, 2025
5
Dr. Mercado is a great doctor, as well as being compassionate and taking good care of her patients.
November 7, 2025
5
Excellent service
November 8, 2025
5
Friendly, polite and helpful.
November 6, 2025
5
Very profesional
November 2, 2025
5
I will continue to visit this health provider.
November 1, 2025
5
I felt very comfortable with the doctor, the nurse, and the reception staff. They were very helpful with my insurance paperwork and scheduling new appointments. They were all very kind. I'm very grateful for their willingness to help.
November 1, 2025
5
Office is so organized, friendly, efficient.. Dr. Mercado expresses a special interest in your total well being. She is truly concerned and focused on helping you live a quality life!
October 29, 2025
4
Staff was friendly. Appt was on time.
December 11, 2025
3
I was very satisfied with my doctor. I've been going to her for 15 years now and I was very satisfied.
January 4, 2026
3
Get use to the provide rs ways for better understanding!
December 11, 2025
2
An hour late, I was given a quick two-minute "check," and then goodbye. I came back to make a new appointment... Totally disappointed!!
November 26, 2025
2
An hour late, I was given a quick two-minute "check," and then goodbye. I came back to make a new appointment... Totally disappointed!!
November 26, 2025
3
I was very satisfied with my doctor. I've been going to her for 15 years now and I was very satisfied.
January 4, 2026
3
Get use to the provide rs ways for better understanding!
December 11, 2025
4
Staff was friendly. Appt was on time.
December 11, 2025
5
A very professional and great experience, thank you.
January 10, 2026
5
Doctor Mercado is always concerned about my health and wellbeing. She always ask me for my opinion and makes recommendations on what I should be doing to improve my situation. She very knowledgeable and great doctor. I would also like thank CMA Stephanie for her outstanding comment and duty to help me during my visit.
January 10, 2026
5
Good
January 10, 2026
5
Dr. Mercado is an excellent professional who has assisted me and improved my quality of life. I am grateful to have found her.
January 9, 2026
5
Better than most with good service on time pleasant people helpful very clean enjoy going to for visits great location keep up the good work
January 9, 2026
5
Very professional and caring
December 31, 2025
5
From the moment I arrived, the service was incredibly professional. Thanks to all the staff, and especially Dr. Mercado, who made me feel very confident and was extremely professional. Thank you.
December 27, 2025
5
Dr Mercado and her staff are top notch professional and well informed healthcare professionals. They show empathy, concern and compassion in their care giving.
December 19, 2025
5
I really liked Dr. Ada Mercato because when I first saw her, she said, you tell people your cardiologist is Dr. Ada Mercato. And it was perfect timing because I needed approval to sign off for my cataract surgery this afternoon. And my cataract surgery went well. And she gladly signed off. Thank you. Bye.
December 14, 2025
5
It would be nice to do a follow up
December 12, 2025
5
Excellent service and professionalism.
December 11, 2025
5
The visit was pleasant and relaxing; everyone was very respectful and kind. The doctor was very professional, providing clear and precise information in her instructions. Thank you.
December 11, 2025
5
Very caring
December 11, 2025
5
Everything's fine, thank you for your attention.
November 23, 2025
5
I love Dr. Mercado and her staff. They are very thorough and proactive in my health care.
November 22, 2025
5
The staff is very welcoming and kind. Stephanie was my nurse who took my BP and EKG. She was so kind and put me at ease immediately. Dr. Mercado is such a warm and caring person. She comes in with a smile and genuinely shows that she is there for you!
November 20, 2025
5
Great and friendly customer service by Dr. Mercado and the nurse. Was happy about the whole experience. Thank you.
November 9, 2025
5
The doctor is excellent, and the support team of nurses and other professionals is outstanding. I love going to her appointments.
November 9, 2025
5
Always have a great experience on my visits.
November 8, 2025
5
Dr. Mercado is a great doctor, as well as being compassionate and taking good care of her patients.
November 7, 2025
5
Excellent service
November 8, 2025
5
Friendly, polite and helpful.
November 6, 2025
5
Very profesional
November 2, 2025
5
I will continue to visit this health provider.
November 1, 2025
5
I felt very comfortable with the doctor, the nurse, and the reception staff. They were very helpful with my insurance paperwork and scheduling new appointments. They were all very kind. I'm very grateful for their willingness to help.
November 1, 2025
5
Office is so organized, friendly, efficient.. Dr. Mercado expresses a special interest in your total well being. She is truly concerned and focused on helping you live a quality life!
October 29, 2025
5
A very professional and great experience, thank you.
January 10, 2026
5
Doctor Mercado is always concerned about my health and wellbeing. She always ask me for my opinion and makes recommendations on what I should be doing to improve my situation. She very knowledgeable and great doctor. I would also like thank CMA Stephanie for her outstanding comment and duty to help me during my visit.
January 10, 2026
5
Good
January 10, 2026
5
Dr. Mercado is an excellent professional who has assisted me and improved my quality of life. I am grateful to have found her.
January 9, 2026
5
Better than most with good service on time pleasant people helpful very clean enjoy going to for visits great location keep up the good work
January 9, 2026
3
I was very satisfied with my doctor. I've been going to her for 15 years now and I was very satisfied.
January 4, 2026
5
Very professional and caring
December 31, 2025
5
From the moment I arrived, the service was incredibly professional. Thanks to all the staff, and especially Dr. Mercado, who made me feel very confident and was extremely professional. Thank you.
December 27, 2025
5
Dr Mercado and her staff are top notch professional and well informed healthcare professionals. They show empathy, concern and compassion in their care giving.
December 19, 2025
5
I really liked Dr. Ada Mercato because when I first saw her, she said, you tell people your cardiologist is Dr. Ada Mercato. And it was perfect timing because I needed approval to sign off for my cataract surgery this afternoon. And my cataract surgery went well. And she gladly signed off. Thank you. Bye.
December 14, 2025
5
It would be nice to do a follow up
December 12, 2025
4
Staff was friendly. Appt was on time.
December 11, 2025
5
Excellent service and professionalism.
December 11, 2025
3
Get use to the provide rs ways for better understanding!
December 11, 2025
5
The visit was pleasant and relaxing; everyone was very respectful and kind. The doctor was very professional, providing clear and precise information in her instructions. Thank you.
December 11, 2025
5
Very caring
December 11, 2025
2
An hour late, I was given a quick two-minute "check," and then goodbye. I came back to make a new appointment... Totally disappointed!!
November 26, 2025
5
Everything's fine, thank you for your attention.
November 23, 2025
5
I love Dr. Mercado and her staff. They are very thorough and proactive in my health care.
November 22, 2025
5
The staff is very welcoming and kind. Stephanie was my nurse who took my BP and EKG. She was so kind and put me at ease immediately. Dr. Mercado is such a warm and caring person. She comes in with a smile and genuinely shows that she is there for you!
November 20, 2025
5
Great and friendly customer service by Dr. Mercado and the nurse. Was happy about the whole experience. Thank you.
November 9, 2025
5
The doctor is excellent, and the support team of nurses and other professionals is outstanding. I love going to her appointments.
November 9, 2025
5
Always have a great experience on my visits.
November 8, 2025
5
Excellent service
November 8, 2025
5
Dr. Mercado is a great doctor, as well as being compassionate and taking good care of her patients.
November 7, 2025
5
Friendly, polite and helpful.
November 6, 2025
5
Very profesional
November 2, 2025
5
I will continue to visit this health provider.
November 1, 2025
5
I felt very comfortable with the doctor, the nurse, and the reception staff. They were very helpful with my insurance paperwork and scheduling new appointments. They were all very kind. I'm very grateful for their willingness to help.
November 1, 2025
5
Office is so organized, friendly, efficient.. Dr. Mercado expresses a special interest in your total well being. She is truly concerned and focused on helping you live a quality life!
October 29, 2025
5
Office is so organized, friendly, efficient.. Dr. Mercado expresses a special interest in your total well being. She is truly concerned and focused on helping you live a quality life!
October 29, 2025
5
I felt very comfortable with the doctor, the nurse, and the reception staff. They were very helpful with my insurance paperwork and scheduling new appointments. They were all very kind. I'm very grateful for their willingness to help.
November 1, 2025
5
I will continue to visit this health provider.
November 1, 2025
5
Very profesional
November 2, 2025
5
Friendly, polite and helpful.
November 6, 2025
5
Dr. Mercado is a great doctor, as well as being compassionate and taking good care of her patients.
November 7, 2025
5
Excellent service
November 8, 2025
5
Always have a great experience on my visits.
November 8, 2025
5
The doctor is excellent, and the support team of nurses and other professionals is outstanding. I love going to her appointments.
November 9, 2025
5
Great and friendly customer service by Dr. Mercado and the nurse. Was happy about the whole experience. Thank you.
November 9, 2025
5
The staff is very welcoming and kind. Stephanie was my nurse who took my BP and EKG. She was so kind and put me at ease immediately. Dr. Mercado is such a warm and caring person. She comes in with a smile and genuinely shows that she is there for you!
November 20, 2025
5
I love Dr. Mercado and her staff. They are very thorough and proactive in my health care.
November 22, 2025
5
Everything's fine, thank you for your attention.
November 23, 2025
2
An hour late, I was given a quick two-minute "check," and then goodbye. I came back to make a new appointment... Totally disappointed!!
November 26, 2025
5
Very caring
December 11, 2025
5
The visit was pleasant and relaxing; everyone was very respectful and kind. The doctor was very professional, providing clear and precise information in her instructions. Thank you.
December 11, 2025
3
Get use to the provide rs ways for better understanding!
December 11, 2025
5
Excellent service and professionalism.
December 11, 2025
4
Staff was friendly. Appt was on time.
December 11, 2025
5
It would be nice to do a follow up
December 12, 2025
5
I really liked Dr. Ada Mercato because when I first saw her, she said, you tell people your cardiologist is Dr. Ada Mercato. And it was perfect timing because I needed approval to sign off for my cataract surgery this afternoon. And my cataract surgery went well. And she gladly signed off. Thank you. Bye.
December 14, 2025
5
Dr Mercado and her staff are top notch professional and well informed healthcare professionals. They show empathy, concern and compassion in their care giving.
December 19, 2025
5
From the moment I arrived, the service was incredibly professional. Thanks to all the staff, and especially Dr. Mercado, who made me feel very confident and was extremely professional. Thank you.
December 27, 2025
5
Very professional and caring
December 31, 2025
3
I was very satisfied with my doctor. I've been going to her for 15 years now and I was very satisfied.
January 4, 2026
5
Better than most with good service on time pleasant people helpful very clean enjoy going to for visits great location keep up the good work
January 9, 2026
5
Dr. Mercado is an excellent professional who has assisted me and improved my quality of life. I am grateful to have found her.
January 9, 2026
5
Good
January 10, 2026
5
Doctor Mercado is always concerned about my health and wellbeing. She always ask me for my opinion and makes recommendations on what I should be doing to improve my situation. She very knowledgeable and great doctor. I would also like thank CMA Stephanie for her outstanding comment and duty to help me during my visit.
January 10, 2026
5
A very professional and great experience, thank you.
January 10, 2026
Ada Mercado, MD
Cardiovascular Disease Specialist with Wellstar since 2010
Rating
4.7
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Specialties
Cardiovascular Disease
, Cardiology
Education
Doctor of Medicine
Medical School
Universidad Nacional Pedro Henriquez Urena
Residency
Ramon Betances HospitalMayaguez Medical Center
Fellowship
Emory Healthcare/Emory University Hospital LSU Health Sciences Center Ponce School of Medicine
Certifications
National Board of Physicians and Surgeons
Spoken Languages
English and Spanish
Hospital Affiliations
Wellstar Kennestone Hospital Wellstar North Fulton Hospital Wellstar Douglas Hospital Wellstar Cobb Hospital
Office Locations
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www.wellstar.org/physicians/ada-mercado-md
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