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
- Stroke
Patient Reviews
Overall patient rating
4.7Based on 514 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
It is always a pleasure to go to Dr. Mercado's office. Everyone is very friendly and helpful. The young woman at the front desk is lovely and the nurse, Stephanie is great. I have much confidence in Dr. Mercado and like her very much.
March 9, 2026
5
Excellent.
March 7, 2026
5
Very pleased with my doctor and staff.
March 7, 2026
5
It is a pleasure to be under the care of Dr. Mercado. She provides excellent care, listens well, and cares about her patients. Her staff is excellent.
March 6, 2026
5
always friendly and efficient
March 7, 2026
5
Dr. Mercado is the best. She is knowledgeable, friendly, and caring.
March 5, 2026
5
Everyone was very attentive, friendly, and I really trust Dr. Mercado. She's been my doctor since 2017.
February 28, 2026
3
Yeah, after all that I went through, as far as explaining what was going on with me having symptoms of a heart attack and all that, they gave me an appointment a month later. So to me, I'm baffled by that. That's all I got to say. I guess everything else was okay.
February 28, 2026
5
This is my first visit with Dr Mercado and any cardiologist and I am very pleased with the time she took to hear my issues, assess my cardiac status, and explain the plan of care and next steps for me.
February 24, 2026
3
We had to wait 50 minutes to see the doctor.
February 24, 2026
5
Staff and Dr Mercado were professional, empathetic and friendly
February 20, 2026
5
Wait time was negligible and nurse and doctor were Very efficient and answered all questions!
February 18, 2026
5
Customer service was excellent starting with reception desk staff.
February 12, 2026
5
I was very grateful to have Dr Mercado available to help me through this process. She was so helpful answering my many questions and listening to me. I appreciate her so much and feel so fortunate to have her as my doctor.
February 12, 2026
5
enjoyed the visit
February 12, 2026
5
FANTASTIC
February 12, 2026
5
Very friendly staff and doctor was attentive and thorough!
February 8, 2026
5
Dr. Mercato was very thorough and I appreciate that and enjoy having her as my doctor. Thank you.
February 7, 2026
5
Dr. Mercado is the best!!! She always spends extra time explaining my medical issues. She is knowledgeable and friendly. I would highly recommend her!!!
February 5, 2026
5
Me gustó el servicio que me dieron. Me vine satisfecho contesto todas mis dudas la doctora.
February 1, 2026
5
Good service.
January 30, 2026
5
Been with Dr Mercado quite awhile- professional personable & has a great staff!
January 29, 2026
5
The nurses get a definite 10 they were friendly, professional and helpful.
January 29, 2026
5
Excellent and attentive service, I am very pleased and grateful!!!
January 26, 2026
5
Congratulations! I really liked the way Dr. Ada Mercado treated us, especially my son, who will be her patient, and me as well.
January 24, 2026
5
Positive always, very thorough professional to the max.
January 23, 2026
5
Just keep going like this.
January 24, 2026
5
The staff is very friendly
January 23, 2026
5
Great job-Thanks
January 14, 2026
5
A very professional and great experience, thank you.
January 10, 2026
5
It is always a pleasure to go to Dr. Mercado's office. Everyone is very friendly and helpful. The young woman at the front desk is lovely and the nurse, Stephanie is great. I have much confidence in Dr. Mercado and like her very much.
March 9, 2026
5
Excellent.
March 7, 2026
5
Very pleased with my doctor and staff.
March 7, 2026
5
It is a pleasure to be under the care of Dr. Mercado. She provides excellent care, listens well, and cares about her patients. Her staff is excellent.
March 6, 2026
5
always friendly and efficient
March 7, 2026
5
Dr. Mercado is the best. She is knowledgeable, friendly, and caring.
March 5, 2026
5
Everyone was very attentive, friendly, and I really trust Dr. Mercado. She's been my doctor since 2017.
February 28, 2026
5
This is my first visit with Dr Mercado and any cardiologist and I am very pleased with the time she took to hear my issues, assess my cardiac status, and explain the plan of care and next steps for me.
February 24, 2026
5
Staff and Dr Mercado were professional, empathetic and friendly
February 20, 2026
5
Wait time was negligible and nurse and doctor were Very efficient and answered all questions!
February 18, 2026
5
Customer service was excellent starting with reception desk staff.
February 12, 2026
5
I was very grateful to have Dr Mercado available to help me through this process. She was so helpful answering my many questions and listening to me. I appreciate her so much and feel so fortunate to have her as my doctor.
February 12, 2026
5
enjoyed the visit
February 12, 2026
5
FANTASTIC
February 12, 2026
5
Very friendly staff and doctor was attentive and thorough!
February 8, 2026
5
Dr. Mercato was very thorough and I appreciate that and enjoy having her as my doctor. Thank you.
February 7, 2026
5
Dr. Mercado is the best!!! She always spends extra time explaining my medical issues. She is knowledgeable and friendly. I would highly recommend her!!!
February 5, 2026
5
Me gustó el servicio que me dieron. Me vine satisfecho contesto todas mis dudas la doctora.
February 1, 2026
5
Good service.
January 30, 2026
5
Been with Dr Mercado quite awhile- professional personable & has a great staff!
January 29, 2026
5
The nurses get a definite 10 they were friendly, professional and helpful.
January 29, 2026
5
Excellent and attentive service, I am very pleased and grateful!!!
January 26, 2026
5
Congratulations! I really liked the way Dr. Ada Mercado treated us, especially my son, who will be her patient, and me as well.
January 24, 2026
5
Positive always, very thorough professional to the max.
January 23, 2026
5
Just keep going like this.
January 24, 2026
5
The staff is very friendly
January 23, 2026
5
Great job-Thanks
January 14, 2026
5
A very professional and great experience, thank you.
January 10, 2026
3
Yeah, after all that I went through, as far as explaining what was going on with me having symptoms of a heart attack and all that, they gave me an appointment a month later. So to me, I'm baffled by that. That's all I got to say. I guess everything else was okay.
February 28, 2026
3
We had to wait 50 minutes to see the doctor.
February 24, 2026
3
Yeah, after all that I went through, as far as explaining what was going on with me having symptoms of a heart attack and all that, they gave me an appointment a month later. So to me, I'm baffled by that. That's all I got to say. I guess everything else was okay.
February 28, 2026
3
We had to wait 50 minutes to see the doctor.
February 24, 2026
5
It is always a pleasure to go to Dr. Mercado's office. Everyone is very friendly and helpful. The young woman at the front desk is lovely and the nurse, Stephanie is great. I have much confidence in Dr. Mercado and like her very much.
March 9, 2026
5
Excellent.
March 7, 2026
5
Very pleased with my doctor and staff.
March 7, 2026
5
It is a pleasure to be under the care of Dr. Mercado. She provides excellent care, listens well, and cares about her patients. Her staff is excellent.
March 6, 2026
5
always friendly and efficient
March 7, 2026
5
Dr. Mercado is the best. She is knowledgeable, friendly, and caring.
March 5, 2026
5
Everyone was very attentive, friendly, and I really trust Dr. Mercado. She's been my doctor since 2017.
February 28, 2026
5
This is my first visit with Dr Mercado and any cardiologist and I am very pleased with the time she took to hear my issues, assess my cardiac status, and explain the plan of care and next steps for me.
February 24, 2026
5
Staff and Dr Mercado were professional, empathetic and friendly
February 20, 2026
5
Wait time was negligible and nurse and doctor were Very efficient and answered all questions!
February 18, 2026
5
Customer service was excellent starting with reception desk staff.
February 12, 2026
5
I was very grateful to have Dr Mercado available to help me through this process. She was so helpful answering my many questions and listening to me. I appreciate her so much and feel so fortunate to have her as my doctor.
February 12, 2026
5
enjoyed the visit
February 12, 2026
5
FANTASTIC
February 12, 2026
5
Very friendly staff and doctor was attentive and thorough!
February 8, 2026
5
Dr. Mercato was very thorough and I appreciate that and enjoy having her as my doctor. Thank you.
February 7, 2026
5
Dr. Mercado is the best!!! She always spends extra time explaining my medical issues. She is knowledgeable and friendly. I would highly recommend her!!!
February 5, 2026
5
Me gustó el servicio que me dieron. Me vine satisfecho contesto todas mis dudas la doctora.
February 1, 2026
5
Good service.
January 30, 2026
5
Been with Dr Mercado quite awhile- professional personable & has a great staff!
January 29, 2026
5
The nurses get a definite 10 they were friendly, professional and helpful.
January 29, 2026
5
Excellent and attentive service, I am very pleased and grateful!!!
January 26, 2026
5
Congratulations! I really liked the way Dr. Ada Mercado treated us, especially my son, who will be her patient, and me as well.
January 24, 2026
5
Positive always, very thorough professional to the max.
January 23, 2026
5
Just keep going like this.
January 24, 2026
5
The staff is very friendly
January 23, 2026
5
Great job-Thanks
January 14, 2026
5
A very professional and great experience, thank you.
January 10, 2026
5
It is always a pleasure to go to Dr. Mercado's office. Everyone is very friendly and helpful. The young woman at the front desk is lovely and the nurse, Stephanie is great. I have much confidence in Dr. Mercado and like her very much.
March 9, 2026
5
Very pleased with my doctor and staff.
March 7, 2026
5
Excellent.
March 7, 2026
5
always friendly and efficient
March 7, 2026
5
It is a pleasure to be under the care of Dr. Mercado. She provides excellent care, listens well, and cares about her patients. Her staff is excellent.
March 6, 2026
5
Dr. Mercado is the best. She is knowledgeable, friendly, and caring.
March 5, 2026
5
Everyone was very attentive, friendly, and I really trust Dr. Mercado. She's been my doctor since 2017.
February 28, 2026
3
Yeah, after all that I went through, as far as explaining what was going on with me having symptoms of a heart attack and all that, they gave me an appointment a month later. So to me, I'm baffled by that. That's all I got to say. I guess everything else was okay.
February 28, 2026
5
This is my first visit with Dr Mercado and any cardiologist and I am very pleased with the time she took to hear my issues, assess my cardiac status, and explain the plan of care and next steps for me.
February 24, 2026
3
We had to wait 50 minutes to see the doctor.
February 24, 2026
5
Staff and Dr Mercado were professional, empathetic and friendly
February 20, 2026
5
Wait time was negligible and nurse and doctor were Very efficient and answered all questions!
February 18, 2026
5
I was very grateful to have Dr Mercado available to help me through this process. She was so helpful answering my many questions and listening to me. I appreciate her so much and feel so fortunate to have her as my doctor.
February 12, 2026
5
Customer service was excellent starting with reception desk staff.
February 12, 2026
5
enjoyed the visit
February 12, 2026
5
FANTASTIC
February 12, 2026
5
Very friendly staff and doctor was attentive and thorough!
February 8, 2026
5
Dr. Mercato was very thorough and I appreciate that and enjoy having her as my doctor. Thank you.
February 7, 2026
5
Dr. Mercado is the best!!! She always spends extra time explaining my medical issues. She is knowledgeable and friendly. I would highly recommend her!!!
February 5, 2026
5
Me gustó el servicio que me dieron. Me vine satisfecho contesto todas mis dudas la doctora.
February 1, 2026
5
Good service.
January 30, 2026
5
Been with Dr Mercado quite awhile- professional personable & has a great staff!
January 29, 2026
5
The nurses get a definite 10 they were friendly, professional and helpful.
January 29, 2026
5
Excellent and attentive service, I am very pleased and grateful!!!
January 26, 2026
5
Just keep going like this.
January 24, 2026
5
Congratulations! I really liked the way Dr. Ada Mercado treated us, especially my son, who will be her patient, and me as well.
January 24, 2026
5
The staff is very friendly
January 23, 2026
5
Positive always, very thorough professional to the max.
January 23, 2026
5
Great job-Thanks
January 14, 2026
5
A very professional and great experience, thank you.
January 10, 2026
5
A very professional and great experience, thank you.
January 10, 2026
5
Great job-Thanks
January 14, 2026
5
Positive always, very thorough professional to the max.
January 23, 2026
5
The staff is very friendly
January 23, 2026
5
Congratulations! I really liked the way Dr. Ada Mercado treated us, especially my son, who will be her patient, and me as well.
January 24, 2026
5
Just keep going like this.
January 24, 2026
5
Excellent and attentive service, I am very pleased and grateful!!!
January 26, 2026
5
The nurses get a definite 10 they were friendly, professional and helpful.
January 29, 2026
5
Been with Dr Mercado quite awhile- professional personable & has a great staff!
January 29, 2026
5
Good service.
January 30, 2026
5
Me gustó el servicio que me dieron. Me vine satisfecho contesto todas mis dudas la doctora.
February 1, 2026
5
Dr. Mercado is the best!!! She always spends extra time explaining my medical issues. She is knowledgeable and friendly. I would highly recommend her!!!
February 5, 2026
5
Dr. Mercato was very thorough and I appreciate that and enjoy having her as my doctor. Thank you.
February 7, 2026
5
Very friendly staff and doctor was attentive and thorough!
February 8, 2026
5
FANTASTIC
February 12, 2026
5
enjoyed the visit
February 12, 2026
5
Customer service was excellent starting with reception desk staff.
February 12, 2026
5
I was very grateful to have Dr Mercado available to help me through this process. She was so helpful answering my many questions and listening to me. I appreciate her so much and feel so fortunate to have her as my doctor.
February 12, 2026
5
Wait time was negligible and nurse and doctor were Very efficient and answered all questions!
February 18, 2026
5
Staff and Dr Mercado were professional, empathetic and friendly
February 20, 2026
3
We had to wait 50 minutes to see the doctor.
February 24, 2026
5
This is my first visit with Dr Mercado and any cardiologist and I am very pleased with the time she took to hear my issues, assess my cardiac status, and explain the plan of care and next steps for me.
February 24, 2026
3
Yeah, after all that I went through, as far as explaining what was going on with me having symptoms of a heart attack and all that, they gave me an appointment a month later. So to me, I'm baffled by that. That's all I got to say. I guess everything else was okay.
February 28, 2026
5
Everyone was very attentive, friendly, and I really trust Dr. Mercado. She's been my doctor since 2017.
February 28, 2026
5
Dr. Mercado is the best. She is knowledgeable, friendly, and caring.
March 5, 2026
5
It is a pleasure to be under the care of Dr. Mercado. She provides excellent care, listens well, and cares about her patients. Her staff is excellent.
March 6, 2026
5
always friendly and efficient
March 7, 2026
5
Excellent.
March 7, 2026
5
Very pleased with my doctor and staff.
March 7, 2026
5
It is always a pleasure to go to Dr. Mercado's office. Everyone is very friendly and helpful. The young woman at the front desk is lovely and the nurse, Stephanie is great. I have much confidence in Dr. Mercado and like her very much.
March 9, 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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