
Highlights
Age Groups Seen
- Adult 21-65
- Older Adult >65
Languages
- English
Gender
FemaleAbout Katie J Rettler
Care Philosophy
I look forward to collaborating with you on your cardiac health and strive to provide compassionate, high-quality care. I have over 10 years of experience as a nurse practitioner in cardiology and also worked as a nurse in the cardiology intensive care unit for many years.
Clinical Interests
- Coronary artery disease
- Heart failure
- Hypertension
- Lipid management
Locations
- 744 South Webster Avenue, Green Bay, WI 54301
- Get Directions
- phone: 920-433-3640
- fax: 920-433-3716
Expertise
Education
- Master of Science in Nursing: Concordia University, 2011
Board Certifications
- Family Nurse Practitioner: American Nurses Credentialing Center (ANCC), 2011
Insurance
- Aetna-Medicare Advantage
- Allstate Benefits f/k/a Allied Beneifts
- Anthem Blue Cross/Blue Shield - HMO, PPO, Blue Priority, Medicare Advantage and Medicaid
- Aspirus Health Plan
- BCBS MI (Upper Peninsula clinics only)
- Care Wisconsin
- Children's Community Health Plan Medicaid and Marketplace
- Cigna
- CommonGround Healthcare
- Community Care Inc.
- Evernorth Behavioral Health
- Exceedent
- First Health
- Galaxy Health Network
- Health Partners - Robin
- Health Payment Systems
- Health Smart
- HealthEOS
- Humana/Choicecare - HMO, PPO and Medicare Advantage
- Inclusa
- Independent Care (ICare)-Medicare Advantage
- Lakeland Care
- Managed Health Services-Medicaid
- Medicare
- MI Medicaid (Upper Michigan and clinics in Wisconsin counties adjoining MI border)
- Molina Healthcare-Medicaid only
- Multiplan
- My Choice Wisconsin
- Network Health Plan - Commercial and Medicare Advantage
- Optum Behavioral Health
- Preferred One
- Security Health Plan - Medicaid
- Three Rivers Provider Network
- Tricare
- Trilogy - Commercial
- United Healthcare - HMO, PPO, UMR, Medicare Advantage, and Medicaid
- UPHP-Commercial, Medicaid (Upper Michigan and select Northern WI clinics)
- WEA Trust Preferred
- WI Medicaid
- WPS Health Insurance
- WPS Health Plan
- Zelis
Ratings & Reviews
4.9 out of 5
128 ratings, 32 reviewsThe Patient Satisfaction Rating is an average of all responses to the care provider related questions shown below from our survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.
- 5 out of 5 starsReviewed on 2/26/2026
I am extremely comfortable with Katie Rettler which is why I moved my care to follow her. She takes time to listen and treats me like a real person.
- 5 out of 5 starsReviewed on 2/24/2026
Katie and everyone who was involved with my visit were polite, respectful and professional. Katie was very concerned with my issues and made me feel like she is taking the steps to address these concerns regarding my health issues. To Katie and her team I want to say thank you.
- 5 out of 5 starsReviewed on 1/20/2026
The person who scheduled my original appt told me they didn't have a waiting list if someone should cancel an appt. Was very excited to get in 4 weeks earlier than scheduled. Katie is an AMAZING NP and I love working with her. She is thorough and so understanding and actually listens to what a patient has to say. She's easy to speak with and doesn't have a negative thing to say about anything, it seems. Wish there were more NPs in this world like her. Now, to make sure scheduling understands that if someone cancels an appt, it's possible to reschedule another patient to fill that time slot.
- 5 out of 5 starsReviewed on 1/23/2026
Love my cardiologist and all the nurses they take care of all my medicine requests
- 5 out of 5 starsReviewed on 1/19/2026
I love my Cardiac team of doctors, I can't thank them enough for their service.
- 5 out of 5 starsReviewed on 1/5/2026
Everyone was very knowledgeable and answered all my questions
- 5 out of 5 starsReviewed on 1/5/2026
Katie Rettler has been incredible, I actually enjoy my appointments with her and the Cardiology team! If not for all the great doctors and nurses at Bellin I would not be alive! I have nothing but love for the heart doctors and nurses, the ICU team, and everyone else at Bellin! They kept me alive through my 2 heart attacks and sixtuple bypass surgery and I will forever be thankful.
- 5 out of 5 starsReviewed on 12/15/2025
The visit went very well
- 5 out of 5 starsReviewed on 12/8/2025
Our experience with Katie Rettler NP was excellent. She took the time to answer all of our questions and didn't make us feel like she needed to leave to move on to some other patient. She was compassionate and was a very good listener.
- 5 out of 5 starsReviewed on 12/8/2025
Katie Rettler does a wonderful job of explaining things. She is personable, professional, and helpful.
- 5 out of 5 starsReviewed on 12/1/2025
Katie Rettler totally exemplifies Emplify Health in every way!
- 5 out of 5 starsReviewed on 11/21/2025
I much appreciate the care received from Dr. Ringwala and Katie Rettler. Both very personable and thorough. I feel comfortable in their presence.
- 5 out of 5 starsReviewed on 11/24/2025
My provider is one of the best providers I have ever had. Her concern for my health is outstanding. She should be commended for her care and support of her patients.
- 5 out of 5 starsReviewed on 11/21/2025
Very helpful to transfer call to appropriate staff member.
- 5 out of 5 starsReviewed on 11/17/2025
Katie is such a good listener and goes above and beyond to address the health issues I have. I put a lot of faith and trust in her evaluations and leave with a positive outlook.
- 5 out of 5 starsReviewed on 11/13/2025
Dr Ringwalla saved my life. Katie Rettler continues to make sure I stay on the right path to being as healthy as possible. She listens closely, asks great questions, provides wonderful answers, reviews test results, keeps me headed in the right direction. All positives! Thanks much.
- 5 out of 5 starsReviewed on 11/13/2025
Knowledgeable and Katie listens not just as Dr patient relationship. She cares.
- 5 out of 5 starsReviewed on 11/13/2025
Professional, informative appointment with Katie.
- 5 out of 5 starsReviewed on 11/17/2025
everyone was great
- 5 out of 5 starsReviewed on 11/13/2025
The staff in the cardiology department are kind and profressional
- 5 out of 5 starsReviewed on 9/18/2025
Katie is excellent!
- 5 out of 5 starsReviewed on 7/21/2025
Katie's very smart and very polite. Very special person as treats you with great respect.
- 5 out of 5 starsReviewed on 7/14/2025
I appreciate the time that they explained the medical terms on my test results.
- 5 out of 5 starsReviewed on 6/27/2025
All were very professional, friendly, and courteous.
- 4 out of 5 starsReviewed on 6/23/2025
Dr. Ringwala and Katie Rettler are the best, the number one reason I've chosen Bellin.
- 5 out of 5 starsReviewed on 6/16/2025
Our visit with Katie Rettler was awesome. She puts you at ease immediately and she made the appt fun. Love her personality and she is very knowledgeable about our particular health issues and gives very clear explanations. Always a pleasure working with her and Dr. Ringwala as well.
- 5 out of 5 starsReviewed on 6/9/2025
Awesome doctor and anybody would be lucky to be able to have her. Thank you.
- 5 out of 5 starsReviewed on 5/16/2025
Katie Rettler is a gem. Keep her!
- 5 out of 5 starsReviewed on 5/8/2025
The provider had excellent bedside manner.
- 5 out of 5 starsReviewed on 4/28/2025
Keep up the amazing work and care that you provide!
- 5 out of 5 starsReviewed on 4/25/2025
I love my Bellin providers
- 5 out of 5 starsReviewed on 4/23/2025
My visit was with Katie Rettler who listened to my concerns and addressed every question I had about my current situation. I left my appointment with great appreciation and relief. I would most definitely recommend Katie Rettler without hesitation. I can only hope that I am able to see her again.