Respiratory Virus and Vaccine Information

Mary A. Merlo, APRN

Certified Nurse Practitioner

4.8

1384 ratings Read Reviews

Northwestern Medicine Regional Medical Group

Primary Specialty

Family Medicine

Secondary Specialty

Immediate Care

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Practice Focus Areas

This medical professional has a particular interest or expertise in:

Nurse Practitioner

Education

Professional Education:: MSN, Olivet Nazarene University School of Life and Health Sciences - 2013

Certifications and Licensures

American Nurses Credentialing Center - Nurse Practitioner-Family (Certified)

Practice Groups and Affiliations

Medical Group:: Northwestern Medicine Regional Medical Group
Alignment Category:: Northwestern Medicine Physician Network

Ratings and Reviews

At Northwestern Medicine, our patient’s feedback is important to us. While different care providers have their own unique strengths, we strive to be as transparent as possible with our quality of care.

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Overall Rating

4.8

4.8

1384 Ratings

Reviews from Patients

100 Most Recent Reviews

Reviews from Patients

100 Most Recent Reviews

February 26, 2026

5.0

Takes her time to listen and help you

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February 26, 2026

5.0

She is someone that listens to your concerns and acts on them!

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February 25, 2026

5.0

Mary Ann Merlo has given me top notch care for many years.

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February 25, 2026

5.0

Mary Merlo and her staff were very friendly, accommodating, and helped me get my pre-surgery clearance testing done timely!

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February 24, 2026

5.0

She and her staff are great.

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February 24, 2026

5.0

No nonsense and thorough, kind and thoughtful.

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February 23, 2026

5.0

Maryann Merlo is great. I have seen her for years.

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February 23, 2026

5.0

She listens with respect and no judgement. She took me in as a patient right away as she was hearing of my struggles, and wanted to ensure I was seen.

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February 20, 2026

5.0

Professional friendly caring

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February 16, 2026

5.0

Dr. Mary Merlo and her staff are beyond professional and caring, thorough and knowledgeable, absolutely the best. Her compassion puts you at ease immediately and you know you're in good hands, especially when nervous or frightened, her wisdom is good medicine.

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February 16, 2026

5.0

Mary took the time to soak to my children as individuals and direct questions to them about their health. I appreciated that is age the kids say in their healthcare.

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February 16, 2026

5.0

Mary Ann is great. Always seems so interested in me and my health. She's very attentive and explains all test and labs in depth.

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February 09, 2026

5.0

Good bedside, manners and very knowledgeable

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January 30, 2026

5.0

Good listening and feedback.

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January 29, 2026

5.0

She is very thorough and professional

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January 28, 2026

5.0

I trust her with my health. She is very honest and knowledgable about any issues or concerns I may have. She listens and is very patient. She seems to love her job. She's awesome.

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January 28, 2026

5.0

Doctor Merlo is a Doctor every one should have she is very compassionate and explains very detail of my health care and the steps taken to get me well.and alway receive the best care.

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January 27, 2026

5.0

She's very helpful when I'm able to speak with her

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January 27, 2026

5.0

She is kind, listens, and does not leave you waiting a long time

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January 27, 2026

5.0

She is a very professional and efficient doctor.

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January 27, 2026

5.0

Personable, informative, engaging

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January 27, 2026

5.0

very nice and knowledgeable care

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January 22, 2026

5.0

Very personable and caring.

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January 21, 2026

5.0

She listens to your concerns and answers all your questions

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January 21, 2026

5.0

Mary Ann is honest and caring. She takes the time to really answer my questions and responds quickly to messages.

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January 21, 2026

5.0

She cares about me.

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January 08, 2026

5.0

Doctor Merlo takes the time to check out the patient and answer any questions.

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January 07, 2026

5.0

She's attentive very thorough she deserves a multitude of recognition she's the best I've seen at northwestern as my experience with some providers has been horrible!

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December 29, 2025

5.0

She is the best

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December 25, 2025

5.0

Patient and takes time and listens to you.

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December 17, 2025

5.0

Maryann always takes time listen and addresses all concerns so that when we leave the appointment we are well informed on diagnosis and treatment. Means a lot when your child is not feeling well and or in pain

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December 16, 2025

5.0

She is very caring and takes time with her patients.

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December 10, 2025

5.0

Mary Ann Merlo is the best doctor I've had! She listens, she cares, and she just all around wants her patients to feel happy leaving the appointment and takes time with us. I appreciate it so much!

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December 10, 2025

5.0

She listens and is very caring. Also answers all my questions

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December 10, 2025

5.0

Makes you feel comfortable

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December 08, 2025

5.0

she listens, and is very knowledgeable.

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December 03, 2025

5.0

MARY ANN & LEVA ARE THE BEST!

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December 02, 2025

5.0

I needed a new primary care provider. She is caring, thorough, and very personable! Delighted to have her as my new Primary Care Doctor!

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November 26, 2025

5.0

She is always very thorough in her exams and comfortable to talk with about what is going on

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November 23, 2025

5.0

Always remember you. Explains things easy. Easy to reach her on my chart

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November 20, 2025

5.0

Mary Ann very thorough. Sweet. Listens and efficient office visit. I adore her. Love you Mary Ann.

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November 18, 2025

5.0

Really appreciate te time she spends with me during appointments. I never feel rushed.

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November 13, 2025

5.0

Best Ever

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November 05, 2025

5.0

Just a fast an thorough visit every time

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November 03, 2025

5.0

Mary is so amazing. Listens to concerns & provides a plan of care. She is so kind and very knowledgeable. Knows what is needed. Cares for family as well as patient.

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November 03, 2025

5.0

Mary Merlo had been highly recommended to me~ Very thorough and covered my concerns~ Ms Merlo is very knowledgeable and does review All Patients History and notes ~ Very Happy to be her Patient~

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November 01, 2025

5.0

Very attentive and listen to my concerns

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October 31, 2025

5.0

Dr.merlo,is a very professional and understanding doctor she always takes care of my medical needs efficiently and without hesitation, i appreciate all that she does for me.

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October 29, 2025

5.0

Mary A Merlo listens and is very attentive to your needs. She is a caring APRN. I like that she is caring and will talk and let you know what you need to do and what is best for you.

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October 28, 2025

5.0

Maryanne is very helpful, explains everything, shows empathy and concern, overall is fabulous!

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October 27, 2025

5.0

She's caring. Listens.

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October 27, 2025

5.0

She is a Brilliant Provider !

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October 24, 2025

5.0

She listens and takes her time

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October 22, 2025

5.0

She was very thorough and thoughtful with her questions. Very knowledgeable and very personable. I would definitely recommend her

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October 20, 2025

5.0

She listens to the patient, and takes care.

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October 20, 2025

5.0

she was very concerned and caring

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October 15, 2025

5.0

Mary Ann is wonderful. She always pleasent and easy to talk to and takes the time to hear everything you have to say.

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October 08, 2025

5.0

She is exceptional! Very thorough.

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October 06, 2025

5.0

impressed with her and all she explained to me - my first visit and I am sold on her

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October 03, 2025

5.0

There service is awesome

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October 02, 2025

5.0

Easy to talk to and welcoming. I had a great first experience.

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October 02, 2025

5.0

Mary is very personal

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September 30, 2025

5.0

She was very down to earth and easy to communicate with. She was thorough and clear with her approach.

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September 30, 2025

5.0

Very knowledgeable, and friendly, shows concern for her patients

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September 25, 2025

5.0

Outstanding people skills and knowledge.

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September 25, 2025

5.0

She's like a friend, makes you feel comfortable and open to talk about anything

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September 23, 2025

5.0

She seems to want to know you and really shows interest in my problems.I felt very comfortable and she did not rush.

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September 19, 2025

5.0

Very professional _ easy to communicate with _ very competent. I like her very much.

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September 17, 2025

5.0

She makes you feel like a friend you can tell them your health worries and concerns

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September 15, 2025

5.0

Very easy to be with /very easy to understand

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September 15, 2025

5.0

She is kind and a very good listener. She answered all of my questions.

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September 15, 2025

5.0

Mary Merlo is very informative.

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September 11, 2025

5.0

She was very attentive and easy to talk with.

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September 11, 2025

5.0

SHES THE BEST LISTENER AND HAS A CALMING FASHION THAT GIVES UOU PEACE

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September 11, 2025

5.0

Personable. Professional and really listened to my concerns

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September 10, 2025

5.0

Very nice

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September 10, 2025

5.0

She is very understanding of your needs and she takes very good care of you

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September 07, 2025

5.0

Mary is the best. I was suffering for days with weezing and coughing. I was thrilled that she saw me so quickly. She helped me with the appropriate medicine and treatment plan. I am thankful and appreciative.

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September 04, 2025

5.0

Very caring doctor explaining exam and what to do to keeping healthy.

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September 02, 2025

5.0

Listened and offered encouragement!

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September 01, 2025

5.0

Listens to you

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August 28, 2025

5.0

Wonderful, Mary Ann Merlo.

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August 27, 2025

5.0

Listens well and gives direction on treatment planning

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August 22, 2025

5.0

Very pleasant

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August 21, 2025

5.0

Answered all my questions

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August 21, 2025

5.0

Because she listens and really cares about her patients !

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August 20, 2025

5.0

great person concerned about me, takes time to talk to me

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August 15, 2025

5.0

Takes time with me . I feel well cared for

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August 14, 2025

5.0

Professional and inquisitive

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August 14, 2025

5.0

Very knowledgeable and great bedside manner

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August 14, 2025

5.0

She took the time to listen to each of us. She asked the kids important questions and listened to their answers. I expect our level of care to be very high here.

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August 12, 2025

5.0

He is my favorite person, good people

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August 12, 2025

5.0

Like I said she listens to mom & truly cares how she is feeling.

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August 12, 2025

5.0

Shows compassion and listens to concerns.

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August 11, 2025

5.0

She's the best! Compassionate, knowledgeable and listens. I love Mary Ann!!

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August 11, 2025

5.0

She is very good at what she does.

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August 09, 2025

5.0

Mary Ann is the Best!

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August 08, 2025

5.0

Mary Merlo was very authentic and that's what I look for with physicians.

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August 08, 2025

5.0

Nice helpful person

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August 04, 2025

5.0

Great listener to patient Didn't feel rushed Quality care

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Disclosures

Mary A. Merlo, APRN reported no external professional relationships for calendar year 2024.

External Professional Relationships

Pharmaceutical, device, and biotechnology companies frequently collaborate with basic scientists and physicians within an academic medical center to help advance science and improve patient care. These relationships are important in achieving scientific breakthroughs and in establishing the effectiveness and safety of promising new therapies. In order to assure objectivity in clinical research and patient care, the Northwestern University Feinberg School of Medicine (Feinberg), Northwestern Memorial HealthCare, Children's Hospital of Chicago Medical Center, and the Shirley Ryan AbilityLab have adopted integrity policies that require research and clinical faculty (in full-time, part-time, and unpaid/voluntary categories) to report compensated and uncompensated external industry relationships. Patients are encouraged to discuss these disclosures with their physician as well as to inquire as to how these relationships are overseen by Feinberg. To learn more about our Disclosure and Professional Integrity Policy, and the conflict of interest policies of our joint affiliate survey partners, please go to our Office for Regulatory Affairs Policies page.

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