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 415 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
Excellent service, kindness, cordiality, professionalism, I would only ask that they fix the telephone switchboard, it is impossible to communicate with a person.
September 26, 2026
5
Perfect experience all the way around.
September 25, 2026
1
Very poor quality professional care. The appointment was scheduled for 4 pm, but the medical care started at 4:45 pm, 45 minutes late.
September 25, 2026
5
Great practice.
September 24, 2026
5
I trust Dr. Mercado very much! She listens closely, is very detailed, and I believe she is most competent, skilled and professional. I am very excited to be her patient! Likewise, the staff members, including the front desk and the nurse, were friendly and professional. I enjoyed the visit and look forward to returning in the future. Thank you.
September 24, 2026
5
Everyone, without exception, is wonderful, attentive, and extremely professional. Thank you for everything.
September 24, 2026
5
Very nice staff and a awesome doctor
September 23, 2026
5
Excellent and very professional service from everyone who attended to me, from reception to the nurse and the doctor.
September 19, 2026
5
Overall, I had a nice experience. The only issue that I have is every time I come to this office if I have an appointment at a certain time, I make sure to be there before my time so that I can be there when my appointment time is up and they call me in 10 minutes late and they do everything that they have to do and when they tell me the doctor will be right in. I sat in that room for 45 minutes. That's the only thing that happens every time I see this doctor other than that she's pretty good, but I don't know how much longer I can deal with sitting in there 45 minutes while they chitchat outside.
September 17, 2026
5
Congratulations to the staff for their extensive experience and excellent service.
September 12, 2026
5
Dr. Mercado is very knowledgeable and personable. I love her!
September 11, 2026
5
My experience there was outstanding. They took good care of me. GOD bless them.
September 11, 2026
5
Excellent service.
September 10, 2026
5
I LOVE Dr. Mercado!!!!!??
September 4, 2026
4
I'm a man of few words. Thank you.
September 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
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
Excellent service, kindness, cordiality, professionalism, I would only ask that they fix the telephone switchboard, it is impossible to communicate with a person.
September 26, 2026
5
Perfect experience all the way around.
September 25, 2026
5
Great practice.
September 24, 2026
5
I trust Dr. Mercado very much! She listens closely, is very detailed, and I believe she is most competent, skilled and professional. I am very excited to be her patient! Likewise, the staff members, including the front desk and the nurse, were friendly and professional. I enjoyed the visit and look forward to returning in the future. Thank you.
September 24, 2026
5
Everyone, without exception, is wonderful, attentive, and extremely professional. Thank you for everything.
September 24, 2026
5
Very nice staff and a awesome doctor
September 23, 2026
5
Excellent and very professional service from everyone who attended to me, from reception to the nurse and the doctor.
September 19, 2026
5
Overall, I had a nice experience. The only issue that I have is every time I come to this office if I have an appointment at a certain time, I make sure to be there before my time so that I can be there when my appointment time is up and they call me in 10 minutes late and they do everything that they have to do and when they tell me the doctor will be right in. I sat in that room for 45 minutes. That's the only thing that happens every time I see this doctor other than that she's pretty good, but I don't know how much longer I can deal with sitting in there 45 minutes while they chitchat outside.
September 17, 2026
5
Congratulations to the staff for their extensive experience and excellent service.
September 12, 2026
5
Dr. Mercado is very knowledgeable and personable. I love her!
September 11, 2026
5
My experience there was outstanding. They took good care of me. GOD bless them.
September 11, 2026
5
Excellent service.
September 10, 2026
5
I LOVE Dr. Mercado!!!!!??
September 4, 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
4
I'm a man of few words. Thank you.
September 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
1
Very poor quality professional care. The appointment was scheduled for 4 pm, but the medical care started at 4:45 pm, 45 minutes late.
September 25, 2026
1
Very poor quality professional care. The appointment was scheduled for 4 pm, but the medical care started at 4:45 pm, 45 minutes late.
September 25, 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
4
I'm a man of few words. Thank you.
September 3, 2026
5
Excellent service, kindness, cordiality, professionalism, I would only ask that they fix the telephone switchboard, it is impossible to communicate with a person.
September 26, 2026
5
Perfect experience all the way around.
September 25, 2026
5
Great practice.
September 24, 2026
5
I trust Dr. Mercado very much! She listens closely, is very detailed, and I believe she is most competent, skilled and professional. I am very excited to be her patient! Likewise, the staff members, including the front desk and the nurse, were friendly and professional. I enjoyed the visit and look forward to returning in the future. Thank you.
September 24, 2026
5
Everyone, without exception, is wonderful, attentive, and extremely professional. Thank you for everything.
September 24, 2026
5
Very nice staff and a awesome doctor
September 23, 2026
5
Excellent and very professional service from everyone who attended to me, from reception to the nurse and the doctor.
September 19, 2026
5
Overall, I had a nice experience. The only issue that I have is every time I come to this office if I have an appointment at a certain time, I make sure to be there before my time so that I can be there when my appointment time is up and they call me in 10 minutes late and they do everything that they have to do and when they tell me the doctor will be right in. I sat in that room for 45 minutes. That's the only thing that happens every time I see this doctor other than that she's pretty good, but I don't know how much longer I can deal with sitting in there 45 minutes while they chitchat outside.
September 17, 2026
5
Congratulations to the staff for their extensive experience and excellent service.
September 12, 2026
5
Dr. Mercado is very knowledgeable and personable. I love her!
September 11, 2026
5
My experience there was outstanding. They took good care of me. GOD bless them.
September 11, 2026
5
Excellent service.
September 10, 2026
5
I LOVE Dr. Mercado!!!!!??
September 4, 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
Excellent service, kindness, cordiality, professionalism, I would only ask that they fix the telephone switchboard, it is impossible to communicate with a person.
September 26, 2026
5
Perfect experience all the way around.
September 25, 2026
1
Very poor quality professional care. The appointment was scheduled for 4 pm, but the medical care started at 4:45 pm, 45 minutes late.
September 25, 2026
5
Great practice.
September 24, 2026
5
I trust Dr. Mercado very much! She listens closely, is very detailed, and I believe she is most competent, skilled and professional. I am very excited to be her patient! Likewise, the staff members, including the front desk and the nurse, were friendly and professional. I enjoyed the visit and look forward to returning in the future. Thank you.
September 24, 2026
5
Everyone, without exception, is wonderful, attentive, and extremely professional. Thank you for everything.
September 24, 2026
5
Very nice staff and a awesome doctor
September 23, 2026
5
Excellent and very professional service from everyone who attended to me, from reception to the nurse and the doctor.
September 19, 2026
5
Overall, I had a nice experience. The only issue that I have is every time I come to this office if I have an appointment at a certain time, I make sure to be there before my time so that I can be there when my appointment time is up and they call me in 10 minutes late and they do everything that they have to do and when they tell me the doctor will be right in. I sat in that room for 45 minutes. That's the only thing that happens every time I see this doctor other than that she's pretty good, but I don't know how much longer I can deal with sitting in there 45 minutes while they chitchat outside.
September 17, 2026
5
Congratulations to the staff for their extensive experience and excellent service.
September 12, 2026
5
Dr. Mercado is very knowledgeable and personable. I love her!
September 11, 2026
5
My experience there was outstanding. They took good care of me. GOD bless them.
September 11, 2026
5
Excellent service.
September 10, 2026
5
I LOVE Dr. Mercado!!!!!??
September 4, 2026
4
I'm a man of few words. Thank you.
September 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
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
4
I'm a man of few words. Thank you.
September 3, 2026
5
I LOVE Dr. Mercado!!!!!??
September 4, 2026
5
Excellent service.
September 10, 2026
5
My experience there was outstanding. They took good care of me. GOD bless them.
September 11, 2026
5
Dr. Mercado is very knowledgeable and personable. I love her!
September 11, 2026
5
Congratulations to the staff for their extensive experience and excellent service.
September 12, 2026
5
Overall, I had a nice experience. The only issue that I have is every time I come to this office if I have an appointment at a certain time, I make sure to be there before my time so that I can be there when my appointment time is up and they call me in 10 minutes late and they do everything that they have to do and when they tell me the doctor will be right in. I sat in that room for 45 minutes. That's the only thing that happens every time I see this doctor other than that she's pretty good, but I don't know how much longer I can deal with sitting in there 45 minutes while they chitchat outside.
September 17, 2026
5
Excellent and very professional service from everyone who attended to me, from reception to the nurse and the doctor.
September 19, 2026
5
Very nice staff and a awesome doctor
September 23, 2026
5
Everyone, without exception, is wonderful, attentive, and extremely professional. Thank you for everything.
September 24, 2026
5
I trust Dr. Mercado very much! She listens closely, is very detailed, and I believe she is most competent, skilled and professional. I am very excited to be her patient! Likewise, the staff members, including the front desk and the nurse, were friendly and professional. I enjoyed the visit and look forward to returning in the future. Thank you.
September 24, 2026
5
Great practice.
September 24, 2026
1
Very poor quality professional care. The appointment was scheduled for 4 pm, but the medical care started at 4:45 pm, 45 minutes late.
September 25, 2026
5
Perfect experience all the way around.
September 25, 2026
5
Excellent service, kindness, cordiality, professionalism, I would only ask that they fix the telephone switchboard, it is impossible to communicate with a person.
September 26, 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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