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Katie J Rettler

Katie J Rettler, NP

Cardiology

Accepting New Patients

Highlights

Age Groups Seen

  • Adult 21-65
  • Older Adult >65

Languages

  • English

Gender

Female

About

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

Expertise

Education

  • Master of Science in Nursing: Concordia University, 2011

Board Certifications

  • Family Nurse Practitioner: American Nurses Credentialing Center (ANCC), 2011

Insurance

Search plans
  • 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

Reviews

4.9 of 5 stars

163 Ratings, 47 Reviews

The 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.

Search reviews
    5 out of 5 stars
    Reviewed on 7/23/2026

    Katie is wonderful

    5 out of 5 stars
    Reviewed on 7/2/2026

    I saw Katie and she was amazing. She listened. She has a sense of humor. She was just great and checking in was wonderful. The people at the check-ins are amazing. It's a fantastic place to be and I'd recommend it to anybody. Thank you.

    5 out of 5 stars
    Reviewed on 7/1/2026

    Very personable and professional, displaying a high degree of compassion.

    5 out of 5 stars
    Reviewed on 6/29/2026

    I was having a very difficult time recently. My mother passed away and I was very emotional. Katie listened to me and was very compassionate and helpful. Thanks.

    5 out of 5 stars
    Reviewed on 6/22/2026

    Katie Rettler and staff were excellent!

    5 out of 5 stars
    Reviewed on 6/19/2026

    First time seeing Katie Rettler and she was extremely prepared for my visit. She was knowledgeable in all of the details of my recent hospitalizations and cardiac history. She displayed breadth of knowledge and confidence in her field of expertise. Regarding the check in process...granted, I am a retired IT professional, but it is utterly annoying to have to take two steps to enter first name, then toggle to last name. And, isn't IT way beyond the user having to press arrows to the next screen? It's a very inefficient check in process.

    5 out of 5 stars
    Reviewed on 6/4/2026

    Deeply grateful for the life-saving measures provided by the Belin Health team.

    5 out of 5 stars
    Reviewed on 6/3/2026

    Katie was excellent, very pleasant, and a sincerely nice person.

    5 out of 5 stars
    Reviewed on 6/2/2026

    This was the first time I'd met Katie. I didn't know what to expect. I felt a bit anxious. However, I found her to be very friendly and attentive. She listened carefully to my concerns. She explained things in a way that I could understand. I appreciated her demeanor and felt at ease by the time I left.

    5 out of 5 stars
    Reviewed on 6/1/2026

    Sometimes there are too many MyChart notifications

    5 out of 5 stars
    Reviewed on 5/28/2026

    Katie was very helpful in every way and even got me some articles on long COVID that I was asking about. She knew a lot and what she didn't know, she looked for. She was very good. I thank her very much. Bye.

    5 out of 5 stars
    Reviewed on 5/25/2026

    Every medical professional I've seen in cardiology has been absolutely fantastic!

    5 out of 5 stars
    Reviewed on 5/21/2026

    My provider was very helpful, knowledgeable and personable.

    5 out of 5 stars
    Reviewed on 5/18/2026

    Katie Rettler is the first person at Emplify that actually listened to me about a problem I've been having. She scheduled a CT scan and had blood labs done. She ordered a swab to see if/what is causing a chronic cough I have. But apparently you don't do that? Katie was very good. I'm beginning to see that your name. "Emplify" doesn't really describe your organization.

    5 out of 5 stars
    Reviewed on 5/11/2026

    Keep up the amazing care!

    5 out of 5 stars
    Reviewed on 5/4/2026

    FANTASTIC CARE

    5 out of 5 stars
    Reviewed on 5/1/2026

    Efficient and timely.

    3 out of 5 stars
    Reviewed on 5/1/2026

    It would have been nice if something was done to solve my problem.

    5 out of 5 stars
    Reviewed on 4/27/2026

    Katie was awesome, explained everything very well. She answered all of our questions in a way that was easy to understand. Would definitely recommend her, and the staff of Dr. Ringwala.

    5 out of 5 stars
    Reviewed on 4/15/2026

    Love Bellinhealth they are the best

    5 out of 5 stars
    Reviewed on 4/14/2026

    Very happy with the providers we see

    5 out of 5 stars
    Reviewed on 4/13/2026

    I checked in on line and still had to ask for assistance at check in the day of my appointment....too many questions and it wasn't clear how to answer.

    5 out of 5 stars
    Reviewed on 4/14/2026

    Katie, along with everyone else I encountered, was wonderful ! It's always a positive experience!

    5 out of 5 stars
    Reviewed on 4/13/2026

    The doctor for this appt with my dad was great! Due to her ability to adapt to him on the fly. She did a great job on every level. Thank you.

    5 out of 5 stars
    Reviewed on 3/11/2026

    Pleasant

    5 out of 5 stars
    Reviewed on 3/3/2026

    Katie is the best! She listens and makes sure her patient understands everything. The nurses were very friendly and making sure I understood everything also.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 2/24/2026

    Friendly, not in a hurry, and answered all my questions.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 1/23/2026

    Love my cardiologist and all the nurses they take care of all my medicine requests

    5 out of 5 stars
    Reviewed on 1/19/2026

    I love my Cardiac team of doctors, I can't thank them enough for their service.

    5 out of 5 stars
    Reviewed on 1/5/2026

    Everyone was very knowledgeable and answered all my questions

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 12/15/2025

    The visit went very well

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed on 12/8/2025

    Katie Rettler does a wonderful job of explaining things. She is personable, professional, and helpful.

    5 out of 5 stars
    Reviewed on 12/1/2025

    Katie Rettler totally exemplifies Emplify Health in every way!

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 11/21/2025

    Very helpful to transfer call to appropriate staff member.

    5 out of 5 stars
    Reviewed 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 stars
    Reviewed 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 stars
    Reviewed on 11/13/2025

    Knowledgeable and Katie listens not just as Dr patient relationship. She cares.

    5 out of 5 stars
    Reviewed on 11/13/2025

    Professional, informative appointment with Katie.

    5 out of 5 stars
    Reviewed on 11/17/2025

    everyone was great

    5 out of 5 stars
    Reviewed on 11/13/2025

    The staff in the cardiology department are kind and profressional

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