Risa Zimmerman, MPAS, PA-C

Family Medicine

Risa Zimmerman, PA-C, MPAS, MBA, is a Physician Assistant who works in ThinkQuick Walk-in Clinic at Think Whole Person Healthcare. She brings more than 30 years of clinical experience and is also the Associate Program Director at the College of Saint Mary Physician Assistant Program. Risa grew up in Friend, Nebraska, where she remembers spending summer days at the local pool and staying out until the 9 o’clock whistle meant it was time to go home. She earned her Physician Assistant degree from the University of Nebraska Medical Center (UNMC) in 1992, completed a Master’s in Physician Assistant Studies at UNMC in 2004, and received an MBA in Healthcare from Creighton University in 2020.

Risa’s interest in medicine began as a child after watching the television show “Emergency!” That early inspiration led her to become a Physician Assistant. For much of her 30-year career, she cared for patients undergoing stem cell transplants. Later, she became interested in urgent care and, more recently, in teaching and mentoring future PAs at the College of Saint Mary, where she focuses on healthcare policy, advocacy, and leadership.

For Risa, Whole Person Healthcare means working together as partners, with patients and their healthcare team. She believes a diagnosis or health issue affects more than just the body; it can also impact family, work, and emotional well-being. Risa’s goal is to guide patients through their healthcare journey with clarity, compassion, and teamwork, making sure they feel seen as whole people, not just medical cases.

After 30 years in medicine, Risa joined think to return to part-time clinical work while continuing to teach at the College of Saint Mary. She is motivated by a desire to keep strong, meaningful connections with her patients, the same relationships that inspired her to enter medicine. Risa values think’s approach to accessible, patient-centered care that focuses on whole-person health, allowing her to remain involved in direct patient care and to continue supporting high-quality, compassionate services.

Patients describe Risa as a caring leader who communicates clearly and ensures that both patients and their families feel understood and supported. Throughout her career, she has focused on building trust through genuine human connection, whether by sharing a story from her hometown, talking about family, or finding common ground. She always treats patients as people first, not just as diagnoses.

Risa is married and has three adult children. Her appreciation for family, community, and service influences her work. When she is not working, she enjoys spending time with her loved ones and hopes to travel around the Mediterranean Sea one day to explore its cultures, history, and landscapes.

Insurance and Coverage

View insurance networks accepted by Think Whole Person Healthcare.

Licensed to practice medicine in: Nebraska
This provider has met the requirements to practice medicine in these states. To schedule a telehealth visit with this provider, you must be physically located within one of these states.

Risa Zimmerman

Contact Information

thinkquick Walk-in Clinic

thinkAksarben Campus and thinkWest Clinic
402.506.9000
402.315.2751

Credentials

MPAS, PA-C

Education

University of Nebraska Medical Center (UNMC)
Creighton University – MBA

Board Certifications

Board-Certified Physician Assistant (NCCPA)

Samantha Middleton, PA-C

Family Medicine

Samantha Middleton, PA-C, is a certified physician assistant specializing in family medicine. Originally from Norfolk, Nebraska, she cherishes her small-town upbringing where everyone knew each other. She shared her school journey with the same classmates from grade school through graduation. She earned her bachelor’s degree from Wayne State College in Wayne, Nebraska, and her master’s degree from Union College in Lincoln, Nebraska.

Samantha realized her calling to healthcare during high school, inspired by the profound difference compassion and care could make in people’s lives, whether through a family member’s experience or her community volunteering. She was drawn to being there for others, offering help, listening, and support. After college in Wayne, she moved to Omaha to support her husband’s path to becoming a doctor, during which they adopted an Australian Shepherd that became part of the family, prompting her to pursue her own healthcare journey in PA school.

To Samantha, Whole Person Healthcare means treating people as complete human beings, not merely a list of diagnoses, emphasizing compassion, collaboration, and patient-centered approaches. Her role involves making a real impact by solving meaningful problems, advocating for those who can’t speak up, and helping patients navigate life’s toughest moments. She has a special interest in OBGYN services and is fired up by the opportunity to be part of something bigger than herself, fostering understanding, trust, and connection in every interaction.

Samantha joined Think Whole Person Healthcare because it allows her to embody her belief in holistic care every day, working with a team that prioritizes compassion, collaboration, and truly patient-centered practices. She views the model as an ideal way to make a difference not just through treatment, but by building genuine understanding, trust, and connections that address the full spectrum of patients’ needs.

Patients describe Samantha as someone who truly listens—not only to their symptoms but to their concerns, fears, and personal stories—creating a calm, compassionate environment where they feel seen, cared for, safe, and respected, regardless of what they’re facing.

Samantha’s life is beautifully full with her family, including her husband, son (born just four months after her PA graduation), and their Australian Shepherd. When not working, she enjoys spending time with loved ones, staying active through working out and golfing, traveling, and teaching dance whenever possible. If time, money, and ability were no obstacle, she would love to visit Paris, France.

Insurance and Coverage

View insurance networks accepted by Think Whole Person Healthcare.

Licensed to practice medicine in: Nebraska
This provider has met the requirements to practice medicine in these states. To schedule a telehealth visit with this provider, you must be physically located within one of these states.

Samantha Middleton

Contact Information

thinkquick Walk-in Clinic

thinkAksarben Campus and thinkWest Clinic
402.506.9000
402.315.2751

Credentials

PA-C

Education

Wayne State College – Bachelor
Union College – Master

Board Certifications

Board-Certified Physician Assistant (NCCPA)

Jessica Grosse, PA-C

Internal Medicine

Jessica Grosse is a Physician Assistant here at think, and is a firm believer in preventative care. She loves taking the time to make sure nothing “slips through the cracks” with patients’ healthcare maintenance.

She was inspired to pursue a career in medicine by her aunts, one a family practitioner and the other a pharmacist. She always knew she wanted to be involved in medicine in some way, and that seed of interest only grew as she got older.

Jessica’s mom suffered a large hemorrhagic stroke at age 53. From the ER, inpatient stay, and extended therapies her mother needs almost 18 years later, Jessica gained a profound appreciation for all the care involved. Especially because of this, she strives to ensure all patients and family members feel their voice is heard and their wishes are being honored.

She believes Ben Franklin’s quote that “An ounce of prevention is worth a pound of cure,” and that it is in line with think’s mission to keep patients as healthy as possible by emphasizing healthcare maintenance and close communication on chronic conditions.

She’d like to think her patients would say she’s a good listener, that she takes the time needed with them, and that she has a good sense of humor that puts them at ease. She says, “I always want patients to feel better after seeing me, regardless of the medical diagnoses and treatments planned.”

Jessica and her husband have three kids who keep them quite busy, which is why she wakes up early to go to a fitness class or enjoy her morning coffee! She also loves to bike, hike, read, and travel when she can.

Insurance and Coverage

View insurance networks accepted by Think Whole Person Healthcare.

Licensed to practice medicine in: Nebraska
This provider has met the requirements to practice medicine in these states. To schedule a telehealth visit with this provider, you must be physically located within one of these states.

Jessica Grosse

Contact Information

thinkAksarben Campus

Level Four, Pod C
402.506.9129
402.315.2736

Credentials

PA-C

Education

University of Nebraska Medical Center

Board Certifications

Board-Certified Physician Assistant (NCCPA)

Clinical Pharmacist

Kala Ray, PharmD

John Lewis, DMSc, PA-C

Internal Medicine

Accepting New Patients

Dr. John Lewis is a Physician Assistant at think. He received his medical degree from Lynchburg University, his Masters of Physician Assistant Studies from UNMC, and his BS from Oregon State University.

Insurance and Coverage

View insurance networks accepted by Think Whole Person Healthcare.

Licensed to practice medicine in: Nebraska
This provider has met the requirements to practice medicine in these states. To schedule a telehealth visit with this provider, you must be physically located within one of these states.

John Lewis

Contact Information

thinkAksarben Campus

Level Five, Pod A
402.506.9124
402.315.2704

Credentials

DMSc, PA-C

Education

Michael Popkov, PharmDLynchburg University: Doctorate of Medical Science
UNMC: Masters of Physician Assistant Studies
Oregon State University: Bachelor’s of Science

Board Certifications

Board-Certified Physician Assistant (NCCPA)

Clinical Pharmacist

Michael Popkov, PharmD

Katie Peterson, PA-C

Family Medicine

Accepting New Patients

Katie Peterson is a Physician Assistant who enjoys preventative medicine as well as managing chronic medical conditions. Her experience has been in family practice, urgent care, and rural health care. Katie also has spent a part of her career working in education while serving as faculty during the development of the Physician Assistant Program at College of St Mary.

She received her Master of Science in Physician Assistant studies from Des Moines University and undergraduate degree in Exercise Science from the University of Nebraska.

When working with Katie you will find an integrated health care approach involving the patient in their health care decisions to ensure the best outcomes as well as a focus on preventative measures.

She enjoys getting to know her patients as a whole person in order to provide thorough care. Katie values the trust her patients put in her and the strong relationships formed through her patient-provider interactions.

Katie is from the Omaha area and when she is not at work, you will find Katie spending her spare time with her husband and four children.

Insurance and Coverage

View insurance networks accepted by Think Whole Person Healthcare.

Licensed to practice medicine in: Nebraska
This provider has met the requirements to practice medicine in these states. To schedule a telehealth visit with this provider, you must be physically located within one of these states.

Katie Peterson

Contact Information

thinkAksarben Campus

Level Five, Pod B
402.506.6343
402.315.2749

Credentials

PA-C

Education

MS – Physician Assistant Program: Des Moines University
BS – Exercise Science: University of Nebraska, Lincoln

Clinical Pharmacist

Mandi Russell, PharmD

Kyle Ginnaty, PA-C

Family Medicine

Kyle Ginnaty, PA-C, is a Physician Assistant at think who specializes in Urgent Care and Walk-in Clinic services. He was born in Fairbanks, Alaska, and grew up in several states as part of a U.S. Air Force family. He also lived in the Azores before moving to Papillion, Nebraska, as a teenager, which he now calls home. Kyle graduated from Gross Catholic High School, earned a Bachelor of Arts in English Literature from the University of Nebraska at Omaha (UNO), and completed his Master of Physician Assistant Studies (MPAS) at the University of Nebraska Medical Center (UNMC).

After graduating from college with a degree in English Literature, Kyle realized he wanted a career that combined intellectual challenge with meaningful, direct impact on people’s lives. This led him to pursue physician assistant studies in a science-based field where he could blend critical thinking with compassionate patient care. He is passionate about treating a wide range of acute and chronic conditions across all ages in the urgent care setting.

To Kyle, Whole Person Healthcare means recognizing that a patient is far more than a list of symptoms. It involves applying clinical expertise to each individual’s unique life circumstances and building a care plan that supports their broader well-being, not just short-term recovery. As a collaborative partner, Kyle actively involves patients in their care by encouraging open communication and shared decision-making. He takes time to explain treatment options, listens closely to patient concerns, and works together with them to develop health goals that fit their lifestyle. By valuing the patient’s voice and lived experience as essential to clinical decision-making, Kyle strives to foster trust while practicing with the most up-to-date evidence and delivering compassionate, personalized care.

Kyle joined think because its patient-centered approach lets him provide evidence-based care with real compassion, treating the whole person. He values the teamwork among different specialties, which makes care more complete and easier to access. This approach matches his goal of making a lasting difference in patients’ lives.

Patients describe Kyle as dedicated, compassionate, and a good listener who keeps up with the latest medical knowledge. When you visit Kyle, you can expect a welcoming environment where he listens carefully, explains each step of your care, and encourages open conversations about your concerns and goals. He makes sure every patient understands their options and feels supported in making choices. Many patients return to thank him and ask for his ongoing care, showing the trust he has earned.

Outside of work, Kyle enjoys spending time with family and friends, reading and writing science fiction and fantasy, running, playing tabletop role-playing games (TTRPGs), bowling, and playing guitar. As a literature enthusiast and as a Tolkien fan, he hopes to visit Oxford and Ginnety’s Grocery in England or Ireland.

Insurance and Coverage

View insurance networks accepted by Think Whole Person Healthcare.

Licensed to practice medicine in: Nebraska
This provider has met the requirements to practice medicine in these states. To schedule a telehealth visit with this provider, you must be physically located within one of these states.

Kyle Ginnaty

Contact Information

thinkquick Walk-in Clinic

thinkAksarben Campus and thinkWest Clinic
402.506.9000
402.315.2751

Credentials

PA-C

Education

University of Nebraska at Omaha: Bachelor of Arts in English Literature
University of Nebraska Medical Center: Master of Physician Assistant Studies

Board Certifications

Board-Certified Physician Assistant (NCCPA)

Cheryl Lindly, AT-C, PA-C

Internal Medicine

Accepting New Patients

Cheryl is an FP/IM Physician Assistant here at think, and brings an enthusiasm for learning to work every day. The fact that the work environment is anything but static, and constantly presents new challenges, is exciting for her, allowing Cheryl to “stretch her brain” and constantly improve her skills.

Her interest in medicine began early on, with her career as a student athletic trainer in high school. Her experiences in athletic training led her to the PA profession.

Cheryl’s talent and skill can be seen in the number of loyal patients she has here at think. In fact, the number of people who followed her here after she left her previous clinic is one of the things she cherishes most about her career — some of those relationships go back almost 30 years, and hold a special place in her heart.

Cheryl hopes her patients see her as caring, approachable, and engaged in helping them feel comfortable, happy, and in charge of their own health. In her off-time, she loves to kayak and golf when the weather allows, and would someday love to travel to Iceland to see the Northern Lights.

Insurance and Coverage

View insurance networks accepted by Think Whole Person Healthcare.

Licensed to practice medicine in: Nebraska
This provider has met the requirements to practice medicine in these states. To schedule a telehealth visit with this provider, you must be physically located within one of these states.

Cheryl Lindly

Contact Information

thinkAksarben Campus

Level Four, Pod C
402.506.9044
402.506.9570

Credentials

AT-C, PA-C

Education

Southwestern College, Winfield KS: BA in English, UNO-MA in American Lit
University of Nebraska Medical Center: BS in Physician Assistant Studies

Board Certifications

Board-Certified Physician Assistant (NCCPA)

Clinical Pharmacist

Mandi Russell, PharmD

Christine Hunter, MPAS, PA-C

Family Medicine

Accepting New Patients

Christine Hunter is a think Physician Assistant who enjoys working in Family Medicine, and has a special interest in Female Health and Pediatrics. She loves that this field allows her to make a real difference in people’s lives by helping them feel healthier and happier. Christine earned her Bachelor’s degree at Des Moines University and her Master’s in Physician Assistant Studies at UNMC.

She first realized that she wanted to go into Medicine when she was in high school. After volunteering at her local hospital, she learned how much she enjoyed helping others. Once, while working in a small-town ER, she encountered a mother with a nine-month-old who was choking and gagging on an easily-removed fortune cookie wrapper. For Christine, that moment acts as a personal reminder that even the simplest treatments can have life-changing effects.

At think, she appreciates that we offer a wide range of services available to the patients. This allows faster, cheaper, and better treatment options. She also enjoys the staff that she works with, and her corner room with a great view. She hopes that her patients find her to be caring and patient.

Christine enjoys reading, bicycling, and has recently taken up quilting during the pandemic. She would love to travel somewhere with a white beach and blue waters.

Insurance and Coverage

View insurance networks accepted by Think Whole Person Healthcare.

Licensed to practice medicine in: Nebraska
This provider has met the requirements to practice medicine in these states. To schedule a telehealth visit with this provider, you must be physically located within one of these states.

Christine Hunter

Contact Information

thinkAksarben Campus

Level Five, Pod A
402.506.9032
402.506.9575

Credentials

MPAS, PA-C

Education

Des Moines University: Bachelor’s Degree
University of Nebraska Medical Center: Master’s Degree

Clinical Pharmacist

Kala Ray, PharmD”Des Moines University: Bachelor’s Degree
University of Nebraska Medical Center: Master’s Degree”