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 410 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 staff and doctors.
November 4, 2026
5
Thanks wellstar.
November 1, 2026
5
Dr. Mercado and her staff at Whitcher St. are very professional and helpful with the concerns of every patient's health.
November 2, 2026
5
Dr M. got me in the 4th quarter and continues to provide care and guidance.
November 1, 2026
5
Dr Mercado is always so very pleasant and happy!
October 31, 2026
5
Dr. Mercado and her staff were kind, on task. I was listened to and all instructions were made clear. I was very pleased with the visit.
November 2, 2026
5
Thorough office visit. Polite and up lifting.
October 29, 2026
5
Dr. Mercado is always very kind and listens to me and is always very thorough. I would say that she is a great cardiologist. Thank you.
October 28, 2026
5
This doctor is excellent. I've had her for many years and I trust her completely.
October 28, 2026
3
Doctor, the cardiologist was really nice. She explained everything really well. I can totally recommend her. Thank you.
October 25, 2026
5
Good experience ?
October 17, 2026
5
Good experience, thanks.
October 3, 2026
5
Dr Mercado took the time to answer patiently all questions and concerns. She never looked at her watch.
October 5, 2026
5
I really felt like Dr. Mercado listened to me.
October 3, 2026
5
Excellent care.
October 3, 2026
5
Everyone was professional, kind and sincere
September 30, 2026
5
Wonderful as always! Dr. Mercado's empathy and professionalism creates a welcoming safe space where us patients find the most needed level of health care and human warmth! Both her clinical and administrative staff (Stephanie and Molly) offer extraordinary support and services to us patients as well! Thank all of them for a fantastic experience! ?????
September 28, 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
Excellent staff and doctors.
November 4, 2026
5
Thanks wellstar.
November 1, 2026
5
Dr. Mercado and her staff at Whitcher St. are very professional and helpful with the concerns of every patient's health.
November 2, 2026
5
Dr M. got me in the 4th quarter and continues to provide care and guidance.
November 1, 2026
5
Dr Mercado is always so very pleasant and happy!
October 31, 2026
5
Dr. Mercado and her staff were kind, on task. I was listened to and all instructions were made clear. I was very pleased with the visit.
November 2, 2026
5
Thorough office visit. Polite and up lifting.
October 29, 2026
5
Dr. Mercado is always very kind and listens to me and is always very thorough. I would say that she is a great cardiologist. Thank you.
October 28, 2026
5
This doctor is excellent. I've had her for many years and I trust her completely.
October 28, 2026
5
Good experience ?
October 17, 2026
5
Good experience, thanks.
October 3, 2026
5
Dr Mercado took the time to answer patiently all questions and concerns. She never looked at her watch.
October 5, 2026
5
I really felt like Dr. Mercado listened to me.
October 3, 2026
5
Excellent care.
October 3, 2026
5
Everyone was professional, kind and sincere
September 30, 2026
5
Wonderful as always! Dr. Mercado's empathy and professionalism creates a welcoming safe space where us patients find the most needed level of health care and human warmth! Both her clinical and administrative staff (Stephanie and Molly) offer extraordinary support and services to us patients as well! Thank all of them for a fantastic experience! ?????
September 28, 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
3
Doctor, the cardiologist was really nice. She explained everything really well. I can totally recommend her. Thank you.
October 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
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
Doctor, the cardiologist was really nice. She explained everything really well. I can totally recommend her. Thank you.
October 25, 2026
5
Excellent staff and doctors.
November 4, 2026
5
Thanks wellstar.
November 1, 2026
5
Dr. Mercado and her staff at Whitcher St. are very professional and helpful with the concerns of every patient's health.
November 2, 2026
5
Dr M. got me in the 4th quarter and continues to provide care and guidance.
November 1, 2026
5
Dr Mercado is always so very pleasant and happy!
October 31, 2026
5
Dr. Mercado and her staff were kind, on task. I was listened to and all instructions were made clear. I was very pleased with the visit.
November 2, 2026
5
Thorough office visit. Polite and up lifting.
October 29, 2026
5
Dr. Mercado is always very kind and listens to me and is always very thorough. I would say that she is a great cardiologist. Thank you.
October 28, 2026
5
This doctor is excellent. I've had her for many years and I trust her completely.
October 28, 2026
5
Good experience ?
October 17, 2026
5
Good experience, thanks.
October 3, 2026
5
Dr Mercado took the time to answer patiently all questions and concerns. She never looked at her watch.
October 5, 2026
5
I really felt like Dr. Mercado listened to me.
October 3, 2026
5
Excellent care.
October 3, 2026
5
Everyone was professional, kind and sincere
September 30, 2026
5
Wonderful as always! Dr. Mercado's empathy and professionalism creates a welcoming safe space where us patients find the most needed level of health care and human warmth! Both her clinical and administrative staff (Stephanie and Molly) offer extraordinary support and services to us patients as well! Thank all of them for a fantastic experience! ?????
September 28, 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
Excellent staff and doctors.
November 4, 2026
5
Dr. Mercado and her staff were kind, on task. I was listened to and all instructions were made clear. I was very pleased with the visit.
November 2, 2026
5
Dr. Mercado and her staff at Whitcher St. are very professional and helpful with the concerns of every patient's health.
November 2, 2026
5
Dr M. got me in the 4th quarter and continues to provide care and guidance.
November 1, 2026
5
Thanks wellstar.
November 1, 2026
5
Dr Mercado is always so very pleasant and happy!
October 31, 2026
5
Thorough office visit. Polite and up lifting.
October 29, 2026
5
Dr. Mercado is always very kind and listens to me and is always very thorough. I would say that she is a great cardiologist. Thank you.
October 28, 2026
5
This doctor is excellent. I've had her for many years and I trust her completely.
October 28, 2026
3
Doctor, the cardiologist was really nice. She explained everything really well. I can totally recommend her. Thank you.
October 25, 2026
5
Good experience ?
October 17, 2026
5
Dr Mercado took the time to answer patiently all questions and concerns. She never looked at her watch.
October 5, 2026
5
I really felt like Dr. Mercado listened to me.
October 3, 2026
5
Excellent care.
October 3, 2026
5
Good experience, thanks.
October 3, 2026
5
Everyone was professional, kind and sincere
September 30, 2026
5
Wonderful as always! Dr. Mercado's empathy and professionalism creates a welcoming safe space where us patients find the most needed level of health care and human warmth! Both her clinical and administrative staff (Stephanie and Molly) offer extraordinary support and services to us patients as well! Thank all of them for a fantastic experience! ?????
September 28, 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
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
5
Wonderful as always! Dr. Mercado's empathy and professionalism creates a welcoming safe space where us patients find the most needed level of health care and human warmth! Both her clinical and administrative staff (Stephanie and Molly) offer extraordinary support and services to us patients as well! Thank all of them for a fantastic experience! ?????
September 28, 2026
5
Everyone was professional, kind and sincere
September 30, 2026
5
Good experience, thanks.
October 3, 2026
5
Excellent care.
October 3, 2026
5
I really felt like Dr. Mercado listened to me.
October 3, 2026
5
Dr Mercado took the time to answer patiently all questions and concerns. She never looked at her watch.
October 5, 2026
5
Good experience ?
October 17, 2026
3
Doctor, the cardiologist was really nice. She explained everything really well. I can totally recommend her. Thank you.
October 25, 2026
5
This doctor is excellent. I've had her for many years and I trust her completely.
October 28, 2026
5
Dr. Mercado is always very kind and listens to me and is always very thorough. I would say that she is a great cardiologist. Thank you.
October 28, 2026
5
Thorough office visit. Polite and up lifting.
October 29, 2026
5
Dr Mercado is always so very pleasant and happy!
October 31, 2026
5
Thanks wellstar.
November 1, 2026
5
Dr M. got me in the 4th quarter and continues to provide care and guidance.
November 1, 2026
5
Dr. Mercado and her staff at Whitcher St. are very professional and helpful with the concerns of every patient's health.
November 2, 2026
5
Dr. Mercado and her staff were kind, on task. I was listened to and all instructions were made clear. I was very pleased with the visit.
November 2, 2026
5
Excellent staff and doctors.
November 4, 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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https://www.wellstar.org/physicians/ada-mercado-md
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