Stephanie Mergenthaler

Stephanie Mergenthaler, DNP, FNP-BC, FNP-C

Patient Rating
4.7 out of 5 (342 Ratings, 87 Comments)

Profile

Gender:
Female

Specialty:

Express Care

Areas of Interest

Stephanie Mergenthaler, DNP, FNP-BC, FNP-C, is a family nurse practitioner who treats patients at MaineGeneral Express Care's clinic locations. A member of MaineGeneral Medical Center's Professional Services Staff since July 2021, she previously worked as a medical surgical telemetry registered nurse and relief charge nurse at the Alfond Center for Health while completing her graduate degree program.

Languages Spoken

  • English

Education

Education

2012
Mount Wachusett Community College, Gardner, MA, Associates, Nursing
2016
Kaplan University, Augusta, ME, Bachelor's, Nursing
2021
Purdue University Global, Augusta, ME, Master's, Nursing (Family Nurse Practitioner Program)
2022
Purdue University Global, Doctorate of Nursing Practice

Professional Memberships

  • American Academy of Nurse Practitioners

Board Certifications

  • American Association of Nurse Practitioners, Family Nurse Practitioner
  • American Nurses Credentialing Center, Family Nurse Practitioner

Office Information

Locations

Patient Reviews

January 12, 2026
Great service and concern for the well being of patients.
January 12, 2026
Let patients know that express care and Dr office is separate from each other
January 06, 2026
Everybody was very friendly. The nurse was very attentive and they got us in and out very quickly.
January 02, 2026
Everyone were pleasant and I got the results I expected!
December 31, 2025
The all-around experience was excellent. The staff there was excellent. The service provider was excellent. I can't say enough about it. Thank you.
December 31, 2025
very quick & through.
December 31, 2025
I specifically came in and said I was looking to be tested for the flu because I had just started experiencing symptoms (was hoping for Tamiflu while in the window)and wasn't informed before being seen that there was no tests available. I would have just left had I known I wasn't getting what I came for.
December 30, 2025
Staff were excellent! My concerns were heard and addressed in a very timely manner - especially since it was quite busy.
December 30, 2025
Everyone was very nice and it was quicker than I expected.
December 21, 2025
Top notch
December 20, 2025
Excellent Service Provider.
December 20, 2025
The facility was clean and the staff was wonderful.
December 18, 2025
The nurse was amazing, very knowledgeable and personable. The doctor as well. I felt as though I received the care I would have received from my pcp. Love the availability for X-rays on site and not having to go to the er to get scans. Very thorough care.
December 16, 2025
Pleasant team all around. Made me feel at ease.
December 05, 2025
Everyone was professional and helpful. They treated me with dignity and understanding.
December 05, 2025
Always a great experience with all of the staff at Gardiner Express Care. Matter of fact, it is the only one I will go to.
November 24, 2025
I was extremely impressed with everything from the moment I walked up to reception to leaving the facility. Super experience!
November 15, 2025
Stephanie was thorough, attentive, and very willing to answer all of my questions. I trusted her and trusted her recommendations. It was a very good experience and I will not hesitate to return to the MG Express Care should I have a need in the future.
November 15, 2025
Stephanie M. listened, explained and documented very well.
November 14, 2025
Thank you
November 14, 2025
Horrible experience saw dr fot 5 mins 4 hours later they could bot locate i walked out they never called or followed up. Glad I didnot die while there.
November 10, 2025
Nice folks who came up with a clear plan for resolving my health issue.
November 10, 2025
Wait time less than 10 minutes, Stephanie was good listener and quickly decided a plan of action, felt confident with her expertise
November 02, 2025
I was treated very well. I appreciated the staff from the two people who saw me. And I just can't think of anything that they could do better at. And I'm just very glad that they're in the city and available.
October 19, 2025
Thank you great care Front desk..... Stephanie and nurse very kind professional great sense of humor
October 17, 2025
Everyone was very professional and helpful!
October 13, 2025
The staff was helpful and kind.
October 12, 2025
I only had a half hour to catch a bus and the staff really worked to get me through treatment and on time.
October 06, 2025
It seems now 48 hours, I guess, after my visit, my lab work still hasn't shown up in Follow My Health. I understood that the Follow My Health portal was a trans facility, trans provider window into all kinds of information. And as I said, I haven't seen anything from this visit show up. in the portal yet. Thank you.
October 02, 2025
Not in relation to express care which they did their job wonderfully, the walk in clinic for orthopedics should specify on the website a acute injury within past 30 days to be seen.
September 24, 2025
What a great group of people! From check-in to leaving, the staff was excellent! I have never had a bad experience when I have had to go!
September 24, 2025
Check in was great. Despite systems being down the process was very efficient. The wait was short compared to most urgent care options. The provider listened well to my concerns and addressed them with empathy and compassion. When giving instructions to do a self swab, things went south. The provider said I needed to "make sure I get it in the right hole." Which made me nervous. Then told me to leave the samples on the counter and I could go home. After completing the swab, something seemed off and I wanted to ask a few questions. I waited a bit and when I looked in the hall, no one was in sight. So I left. Upon returning home, I had some pain and bleeding which was a big concern to me. Both continued into the next morning so I called to see if I should return. The nurse I spoke to on the phone sounded pretty annoyed to be taking my call. She said it sounds like severe UTI symptoms but I didn't do a urine sample when I was there and was up to me if I wanted to come back in because they can't be sure if it's a problem without me being there. A little dismissive of the potential that there could be a problem. But I went back. The second provider I saw had me do a urine sample and assured me that there was no way I could have done the test wrong and injured myself. She said it's normal to have some irritation after the test. I really wish the first provider had told me what to expect and the possibility that these things could happen when doing this kind of test. I probably wouldn't have come back and wasted a whole day worrying that I had done something wrong or hurt myself. Even more, I wish the first provider returned to make sure I didn't have any further questions and make sure the test was completed without any problems or concerns.
September 11, 2025
Very smooth process and much quicker than other urgent care facilities I have used in the past.
September 09, 2025
My experiences at MGH Express has always been positive and smoothly handled..
September 09, 2025
Being from Oregon I very much appreciated the kindness and professionalism of the people I met at the express clinic. If I had an award to give I'd give it to mgh
September 09, 2025
Friendly efficient staff. Caring and compassionate. The Dr was very thorough and explained everything perfectly.
September 09, 2025
I believe my providers name was Stephanie, she was so kind and very in tune with my situation. She called me the next day to check in and offer other tests. Loved her. Thank you for the great care
August 22, 2025
Felt very comfortable with the staff member who put monitor on. He was knowledgeable and respectful and pleasant
August 07, 2025
Normally I get good results in the quickest manner. This time I was sent to the emergency room and had to pay an additional $100. Copay . They didn't do anything that required an emergency room.
August 05, 2025
A great team as usual. Thank you.
August 01, 2025
As an employee at Maine General, I'm not just saying this just to say this. I was very impressed with the express care. I went there after work, thinking it was going to take me at least two hours in there. I was in and out of there in 45 minutes! I was very happy
August 01, 2025
The staff was kind
August 01, 2025
My provider, Stephanie, listened to me, acknowledged what was going on with my health, and prescribed a treatment regiment that really helped me.
July 22, 2025
The team was not sure what to do to stop the bleeding of a vein, but as luck would have it, it stopped while in their care.
July 20, 2025
Grateful that I had somewhere to go on a Sunday morning--fast & professional
July 18, 2025
Very efficient and fast. Follow up call the following day with results of test.
July 14, 2025
Everyone was fantastic! Thank you
July 10, 2025
Hi, it was perfect as usual. I don't think you could change a thing to make me happy. Thank you.
July 04, 2025
The front staff was very nice, I was seen within minutes..I'm very thankful for the quick and professional service I received, and so glad you're in our neighborhood. I feel lucky to be able to only drive 10 minutes to get help. Ty!
June 26, 2025
I was greeted and seen by a provider almost immediately. The representative that checked me in was pleasant, professional and respectful. My provider Stephanie was caring, understanding and professional. I was very pleased with my experience and care.
June 22, 2025
Hi. I just, there was one thing on my form that somebody put down that I used to be, that I was a former smoker and I never smoked in my life. So if somebody could change that, I would appreciate it. Thank you.
June 17, 2025
Friendly, very helpful and answered my questions.
June 12, 2025
I was extremely pleased with the service that I had. I'd recommend you guys to anybody. Appreciate it very much. Thank you.
June 09, 2025
I thought that the staff was very good. The nurses were great. The check-in was great. The doctor was great. I realized there's a problem with the amount of people coming in to the ER. And my wife and I both said that even though we had to wait a long time, it wasn't their fault. But overall, we were very pleased.
June 07, 2025
Efficient, competent and very friendly. They did a follow up call to check on me
June 03, 2025
Yes, I would say how much I appreciated everything that they did for me. I was very, very happy and I would recommend you very highly. And I appreciate and I thank you very much.
May 25, 2025
An all female team is excellent, thorough, caring, considerate and knowledgeable.
May 23, 2025
The staff was professional was generally concerned about why I was there. Fast and professional service when I needed it most.
May 20, 2025
It would be better if it did not take as long to get through the ER process, but I realize you only have so much space and staff.
May 11, 2025
It was fine. Would have preferred to receive a written report of findings and recommendations. Otherwise, everything was well done. Thank you
May 10, 2025
Very professional
May 01, 2025
Nurse was very nice
April 28, 2025
They were awesome to me
April 22, 2025
I have always received good and trusted care there.
April 22, 2025
I used your gardiner express care after having a virus for 8+ days and having asthma issues. I felt well cared for at this facility.
April 21, 2025
This was my first time here and the staff was quick and friendly and made what could have been a bad experience a good one. Thank you!!!!
April 18, 2025
Excellent service from everyone.
April 15, 2025
Main general does a fantastic job of taking care of their patience. I would definitely recommend.
April 08, 2025
Very glad to have service.
April 08, 2025
Very good healthcare facility.
April 07, 2025
The doctor was Extremely nice I really had a great experience coming to the Express Care on that day. She had great customer service was very knowledgeable. I was very comfortable with her and I hope I get to see her again.
April 03, 2025
I've always had very good care at express care, always recommend the place to many
April 02, 2025
They above and beyond to help me.
March 30, 2025
I was treated immediately and was very satisfied with using Urgent Care.
March 25, 2025
They took us very quickly. Thank you.
March 25, 2025
Always get treated as a person and not as a number!
March 24, 2025
Quick and efficient, a real solution to my problem
March 18, 2025
I absolutely love express care. The staff there are the best. They listen and do every thing they can to help you and more. Thank you
February 21, 2025
When I went in, I had a sore throat and I explained to the PA or whoever it was, the lady there that I had a sore throat and they checked for strep and it might have been, might have made me feel better. It probably was more my fault, but I'm checking to see if I had COVID or whatever, because they never tested for that. So it's just in today's days, in today's society, especially what's going on now, I think it was important, but I don't think it turned out to be COVID at all, but it's still giving me a problem. So anyway, I just thought I'd let you know.
February 21, 2025
I am so satisfied and comfortable with all they treat me so good 100%
February 20, 2025
My primary care at Augusta family medicine had No appointments for 2 weeks, including sick appointments. This forced me to go to urgent care. This isn't acceptable.
February 14, 2025
Wait time was the largest challenge (2.5hrs).
February 11, 2025
It was a very productive meeting. Our provider knows our situation well and understands that as my husband's caregiver, I need things explained clearly. She provides clear and precise instructions and I never feel rushed if I have to ask to have an answered repeated.
January 30, 2025
All of the staff were very friendly and polite. The wait wasn't long and I was able to pick up my prescription right away. They called them in right away! I would definitely recommend this facility to all my friends and family!
January 26, 2025
They got us in and out in a timely matter.
January 24, 2025
Everyone was very considerate and kind.
January 21, 2025
very caring helpful and timely manner made me feel like i mattered.
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