Ada Mercado, MD
Specialties
Cardiovascular Disease
Cardiology (Archived)
Education & Training
Doctor of Medicine
Ada Mercado, MD
Cardiovascular Disease Specialist with Wellstar since 2010.
Specialties
Cardiovascular Disease
Cardiology (Archived)
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 (Archived)
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 406 patient ratings
- I'd recommend this provider to family and friends
-
- I'd recommend this practice 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
Nice lady
August 30, 2026
5
A very good experience and first-class service from the moment I arrived until I left. Thank you to all the staff.
August 29, 2026
3
I had more questions about my present situation. I could have had a better visit with more time and conversation. I felt it was not the best nor most productive visit I have had with my provider.
August 28, 2026
5
Everyone was very helpful and accommodating. Loved talking with the doctor. Her energy was very uplifting. Always pleasant to talk to.
August 27, 2026
5
Excellent Doctor and Staff
August 26, 2026
5
Excellent doctor and staff.
August 23, 2026
5
The wait to be served was a bit long!
August 27, 2026
5
Very professional and keeps to scheduled appointment times.
August 14, 2026
5
Excellent.
July 18, 2026
5
They are very efficient and responsible.
July 18, 2026
5
Dr. Ada Mercado is very professional. Thanks to her knowledge and dedication, my husband maintains a good quality of life. And all the staff at Well Star are professional and provide excellent service. Thank you.
July 17, 2026
5
Dr. Mercado and her nurses, Katie and Ashley, were absolutely phenomenal. They were all knowledgeable and understanding of their field, and jumped into action when I started having issues with my heart racing.
July 16, 2026
5
The doctor was very polite and attentive to my problem and took her time to explain everything I should do in terms I could understand.
July 16, 2026
5
Listened to my concerns and answered my questions. Took the time I needed to answer my questions
July 15, 2026
5
There was a very long wait. My appointment was for 3:45 and said to be there at 3:30. I wasn't seen until after 4:30.
July 12, 2026
3
I waited 45 minutes past my appointment time.And I realised my doctor was in a wheelchair from an accident. I believe I should have been informed about the delay, I'm expected to be on time and I want to be notified if my appointment will be delayed, what comes around goes around???
July 11, 2026
5
Thanks to all for professionally doing your job. It makes a big difference when you have health issues.
July 10, 2026
5
Very good.
July 10, 2026
3
If it was very much delayed but I understand Dr Mercado was in a wheelchair. Is it when fine but the recommendations are pretty repetitive
July 9, 2026
5
Received very helpful information and care.
July 4, 2026
5
All care and service were provided with excellence, and I was very satisfied. Many thanks to the staff and team at Urgent Care Wellstar, 2450 Old Milton Parkway.
May 25, 2026
5
Very professional.
May 22, 2026
2
The wait time for so long. The doctor was asking Asking question that he had nothing to do with the cardiology appointment. She was trying to act more like she was a gynecologist.
May 22, 2026
5
Thanks!
May 19, 2026
5
Ada Mercado is an excellent doctor and her care is superb.
May 16, 2026
5
Dr. Mercado is always kind and listens. Staff is caring.
May 7, 2026
5
Excellent Care as usual you have a wonderful staff and Dr. Mercado is the greatest
May 6, 2026
5
I was very happy with Dr Mercado. She was very friendly. Went through all my records that had been transferred from NJ. She was very thorough and set up follow ups to form a new baseline. I just felt she was very honest and she actually put my mind at ease. A very good choice to use this practice. I am in good hands.
May 4, 2026
5
Thank you all, all the staff were very kind.
May 3, 2026
5
Nothing. Very good.
May 3, 2026
5
Nice lady
August 30, 2026
5
A very good experience and first-class service from the moment I arrived until I left. Thank you to all the staff.
August 29, 2026
5
Everyone was very helpful and accommodating. Loved talking with the doctor. Her energy was very uplifting. Always pleasant to talk to.
August 27, 2026
5
Excellent Doctor and Staff
August 26, 2026
5
Excellent doctor and staff.
August 23, 2026
5
The wait to be served was a bit long!
August 27, 2026
5
Very professional and keeps to scheduled appointment times.
August 14, 2026
5
Excellent.
July 18, 2026
5
They are very efficient and responsible.
July 18, 2026
5
Dr. Ada Mercado is very professional. Thanks to her knowledge and dedication, my husband maintains a good quality of life. And all the staff at Well Star are professional and provide excellent service. Thank you.
July 17, 2026
5
Dr. Mercado and her nurses, Katie and Ashley, were absolutely phenomenal. They were all knowledgeable and understanding of their field, and jumped into action when I started having issues with my heart racing.
July 16, 2026
5
The doctor was very polite and attentive to my problem and took her time to explain everything I should do in terms I could understand.
July 16, 2026
5
Listened to my concerns and answered my questions. Took the time I needed to answer my questions
July 15, 2026
5
There was a very long wait. My appointment was for 3:45 and said to be there at 3:30. I wasn't seen until after 4:30.
July 12, 2026
5
Thanks to all for professionally doing your job. It makes a big difference when you have health issues.
July 10, 2026
5
Very good.
July 10, 2026
5
Received very helpful information and care.
July 4, 2026
5
All care and service were provided with excellence, and I was very satisfied. Many thanks to the staff and team at Urgent Care Wellstar, 2450 Old Milton Parkway.
May 25, 2026
5
Very professional.
May 22, 2026
5
Thanks!
May 19, 2026
5
Ada Mercado is an excellent doctor and her care is superb.
May 16, 2026
5
Dr. Mercado is always kind and listens. Staff is caring.
May 7, 2026
5
Excellent Care as usual you have a wonderful staff and Dr. Mercado is the greatest
May 6, 2026
5
I was very happy with Dr Mercado. She was very friendly. Went through all my records that had been transferred from NJ. She was very thorough and set up follow ups to form a new baseline. I just felt she was very honest and she actually put my mind at ease. A very good choice to use this practice. I am in good hands.
May 4, 2026
5
Thank you all, all the staff were very kind.
May 3, 2026
5
Nothing. Very good.
May 3, 2026
3
I had more questions about my present situation. I could have had a better visit with more time and conversation. I felt it was not the best nor most productive visit I have had with my provider.
August 28, 2026
3
I waited 45 minutes past my appointment time.And I realised my doctor was in a wheelchair from an accident. I believe I should have been informed about the delay, I'm expected to be on time and I want to be notified if my appointment will be delayed, what comes around goes around???
July 11, 2026
3
If it was very much delayed but I understand Dr Mercado was in a wheelchair. Is it when fine but the recommendations are pretty repetitive
July 9, 2026
2
The wait time for so long. The doctor was asking Asking question that he had nothing to do with the cardiology appointment. She was trying to act more like she was a gynecologist.
May 22, 2026
2
The wait time for so long. The doctor was asking Asking question that he had nothing to do with the cardiology appointment. She was trying to act more like she was a gynecologist.
May 22, 2026
3
I had more questions about my present situation. I could have had a better visit with more time and conversation. I felt it was not the best nor most productive visit I have had with my provider.
August 28, 2026
3
I waited 45 minutes past my appointment time.And I realised my doctor was in a wheelchair from an accident. I believe I should have been informed about the delay, I'm expected to be on time and I want to be notified if my appointment will be delayed, what comes around goes around???
July 11, 2026
3
If it was very much delayed but I understand Dr Mercado was in a wheelchair. Is it when fine but the recommendations are pretty repetitive
July 9, 2026
5
Nice lady
August 30, 2026
5
A very good experience and first-class service from the moment I arrived until I left. Thank you to all the staff.
August 29, 2026
5
Everyone was very helpful and accommodating. Loved talking with the doctor. Her energy was very uplifting. Always pleasant to talk to.
August 27, 2026
5
Excellent Doctor and Staff
August 26, 2026
5
Excellent doctor and staff.
August 23, 2026
5
The wait to be served was a bit long!
August 27, 2026
5
Very professional and keeps to scheduled appointment times.
August 14, 2026
5
Excellent.
July 18, 2026
5
They are very efficient and responsible.
July 18, 2026
5
Dr. Ada Mercado is very professional. Thanks to her knowledge and dedication, my husband maintains a good quality of life. And all the staff at Well Star are professional and provide excellent service. Thank you.
July 17, 2026
5
Dr. Mercado and her nurses, Katie and Ashley, were absolutely phenomenal. They were all knowledgeable and understanding of their field, and jumped into action when I started having issues with my heart racing.
July 16, 2026
5
The doctor was very polite and attentive to my problem and took her time to explain everything I should do in terms I could understand.
July 16, 2026
5
Listened to my concerns and answered my questions. Took the time I needed to answer my questions
July 15, 2026
5
There was a very long wait. My appointment was for 3:45 and said to be there at 3:30. I wasn't seen until after 4:30.
July 12, 2026
5
Thanks to all for professionally doing your job. It makes a big difference when you have health issues.
July 10, 2026
5
Very good.
July 10, 2026
5
Received very helpful information and care.
July 4, 2026
5
All care and service were provided with excellence, and I was very satisfied. Many thanks to the staff and team at Urgent Care Wellstar, 2450 Old Milton Parkway.
May 25, 2026
5
Very professional.
May 22, 2026
5
Thanks!
May 19, 2026
5
Ada Mercado is an excellent doctor and her care is superb.
May 16, 2026
5
Dr. Mercado is always kind and listens. Staff is caring.
May 7, 2026
5
Excellent Care as usual you have a wonderful staff and Dr. Mercado is the greatest
May 6, 2026
5
I was very happy with Dr Mercado. She was very friendly. Went through all my records that had been transferred from NJ. She was very thorough and set up follow ups to form a new baseline. I just felt she was very honest and she actually put my mind at ease. A very good choice to use this practice. I am in good hands.
May 4, 2026
5
Thank you all, all the staff were very kind.
May 3, 2026
5
Nothing. Very good.
May 3, 2026
5
Nice lady
August 30, 2026
5
A very good experience and first-class service from the moment I arrived until I left. Thank you to all the staff.
August 29, 2026
3
I had more questions about my present situation. I could have had a better visit with more time and conversation. I felt it was not the best nor most productive visit I have had with my provider.
August 28, 2026
5
Everyone was very helpful and accommodating. Loved talking with the doctor. Her energy was very uplifting. Always pleasant to talk to.
August 27, 2026
5
The wait to be served was a bit long!
August 27, 2026
5
Excellent Doctor and Staff
August 26, 2026
5
Excellent doctor and staff.
August 23, 2026
5
Very professional and keeps to scheduled appointment times.
August 14, 2026
5
Excellent.
July 18, 2026
5
They are very efficient and responsible.
July 18, 2026
5
Dr. Ada Mercado is very professional. Thanks to her knowledge and dedication, my husband maintains a good quality of life. And all the staff at Well Star are professional and provide excellent service. Thank you.
July 17, 2026
5
The doctor was very polite and attentive to my problem and took her time to explain everything I should do in terms I could understand.
July 16, 2026
5
Dr. Mercado and her nurses, Katie and Ashley, were absolutely phenomenal. They were all knowledgeable and understanding of their field, and jumped into action when I started having issues with my heart racing.
July 16, 2026
5
Listened to my concerns and answered my questions. Took the time I needed to answer my questions
July 15, 2026
5
There was a very long wait. My appointment was for 3:45 and said to be there at 3:30. I wasn't seen until after 4:30.
July 12, 2026
3
I waited 45 minutes past my appointment time.And I realised my doctor was in a wheelchair from an accident. I believe I should have been informed about the delay, I'm expected to be on time and I want to be notified if my appointment will be delayed, what comes around goes around???
July 11, 2026
5
Thanks to all for professionally doing your job. It makes a big difference when you have health issues.
July 10, 2026
5
Very good.
July 10, 2026
3
If it was very much delayed but I understand Dr Mercado was in a wheelchair. Is it when fine but the recommendations are pretty repetitive
July 9, 2026
5
Received very helpful information and care.
July 4, 2026
5
All care and service were provided with excellence, and I was very satisfied. Many thanks to the staff and team at Urgent Care Wellstar, 2450 Old Milton Parkway.
May 25, 2026
5
Very professional.
May 22, 2026
2
The wait time for so long. The doctor was asking Asking question that he had nothing to do with the cardiology appointment. She was trying to act more like she was a gynecologist.
May 22, 2026
5
Thanks!
May 19, 2026
5
Ada Mercado is an excellent doctor and her care is superb.
May 16, 2026
5
Dr. Mercado is always kind and listens. Staff is caring.
May 7, 2026
5
Excellent Care as usual you have a wonderful staff and Dr. Mercado is the greatest
May 6, 2026
5
I was very happy with Dr Mercado. She was very friendly. Went through all my records that had been transferred from NJ. She was very thorough and set up follow ups to form a new baseline. I just felt she was very honest and she actually put my mind at ease. A very good choice to use this practice. I am in good hands.
May 4, 2026
5
Thank you all, all the staff were very kind.
May 3, 2026
5
Nothing. Very good.
May 3, 2026
5
Nothing. Very good.
May 3, 2026
5
Thank you all, all the staff were very kind.
May 3, 2026
5
I was very happy with Dr Mercado. She was very friendly. Went through all my records that had been transferred from NJ. She was very thorough and set up follow ups to form a new baseline. I just felt she was very honest and she actually put my mind at ease. A very good choice to use this practice. I am in good hands.
May 4, 2026
5
Excellent Care as usual you have a wonderful staff and Dr. Mercado is the greatest
May 6, 2026
5
Dr. Mercado is always kind and listens. Staff is caring.
May 7, 2026
5
Ada Mercado is an excellent doctor and her care is superb.
May 16, 2026
5
Thanks!
May 19, 2026
2
The wait time for so long. The doctor was asking Asking question that he had nothing to do with the cardiology appointment. She was trying to act more like she was a gynecologist.
May 22, 2026
5
Very professional.
May 22, 2026
5
All care and service were provided with excellence, and I was very satisfied. Many thanks to the staff and team at Urgent Care Wellstar, 2450 Old Milton Parkway.
May 25, 2026
5
Received very helpful information and care.
July 4, 2026
3
If it was very much delayed but I understand Dr Mercado was in a wheelchair. Is it when fine but the recommendations are pretty repetitive
July 9, 2026
5
Very good.
July 10, 2026
5
Thanks to all for professionally doing your job. It makes a big difference when you have health issues.
July 10, 2026
3
I waited 45 minutes past my appointment time.And I realised my doctor was in a wheelchair from an accident. I believe I should have been informed about the delay, I'm expected to be on time and I want to be notified if my appointment will be delayed, what comes around goes around???
July 11, 2026
5
There was a very long wait. My appointment was for 3:45 and said to be there at 3:30. I wasn't seen until after 4:30.
July 12, 2026
5
Listened to my concerns and answered my questions. Took the time I needed to answer my questions
July 15, 2026
5
Dr. Mercado and her nurses, Katie and Ashley, were absolutely phenomenal. They were all knowledgeable and understanding of their field, and jumped into action when I started having issues with my heart racing.
July 16, 2026
5
The doctor was very polite and attentive to my problem and took her time to explain everything I should do in terms I could understand.
July 16, 2026
5
Dr. Ada Mercado is very professional. Thanks to her knowledge and dedication, my husband maintains a good quality of life. And all the staff at Well Star are professional and provide excellent service. Thank you.
July 17, 2026
5
They are very efficient and responsible.
July 18, 2026
5
Excellent.
July 18, 2026
5
Very professional and keeps to scheduled appointment times.
August 14, 2026
5
Excellent doctor and staff.
August 23, 2026
5
Excellent Doctor and Staff
August 26, 2026
5
The wait to be served was a bit long!
August 27, 2026
5
Everyone was very helpful and accommodating. Loved talking with the doctor. Her energy was very uplifting. Always pleasant to talk to.
August 27, 2026
3
I had more questions about my present situation. I could have had a better visit with more time and conversation. I felt it was not the best nor most productive visit I have had with my provider.
August 28, 2026
5
A very good experience and first-class service from the moment I arrived until I left. Thank you to all the staff.
August 29, 2026
5
Nice lady
August 30, 2026
Ada Mercado, MD
Cardiovascular Disease Specialist with Wellstar since 2010
Rating
4.7
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Specialties
Cardiovascular Disease
, Cardiology (Archived)
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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