Check-In With the Healow Patient Portal!
Primary Care Clinic: 2900 Amherst Ave | 785-539-8700
Behavioral Health: 2900 Amherst Ave | 785-775-1770
Wound Care Clinic: 2900 Amherst Ave | 785-539-8700
Vein Clinic of Kansas: 200 Research Drive | 785-539-4644
Heart & Vascular Clinic: 200 Research Drive | 785-539-4644
Our Providers
Dr. Priyantha Ranaweera
Interventional Cardiologist
Priyantha Ranaweera, MD, MHCM, FRACP, FACC, is a Harvard-trained interventional cardiologist. He started Heart and Vascular Clinics in 2012 to better serve the needs of the Flint Hills region.
Caring for patients in the Manhattan area since 2007, he created Manhattan Medical Group in 2018 to provide an integrated care model with primary care and specialized care.
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Under his leadership, Manhattan Medical Group is dedicated to the long-term success of patients’ health and the community.
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Dr. Ranaweera completed his undergraduate work in Sri Lanka and an internal medicine residency in New Zealand and Australia. He continued his education with the following training:
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Coronary Angioscopy Training in Japan
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Coronary CT Fellowship in Germany
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Cardiology Fellowship in Australia
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Peripheral Interventional Fellowship at Harvard Medical School
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Coronary Interventional Fellowship at Harvard Medical School
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Master of Science in Healthcare Leadership from Harvard University
Dr. Ranaweera diagnoses and treats patients with peripheral artery disease, coronary artery disease, and arrhythmias among other cardiovascular diseases. He specializes in peripheral interventions, heart catheterizations, pacemaker and ICD implants, and general cardiology.
Dr. Ranaweera sees patients at our Manhattan, Junction City, Wamego, Abilene, Clay Center, and Council Grove clinic locations.
Larry Pierce
Physician Assistant
Specialty: Primary Care
Larry Pierce Jr., PA-C, joined Manhattan Medical Group in March 2021 after serving 21 years in the United States Army. Larry has over ten years of experience in family medicine. He was awarded a Master’s Degree in Physician Assistant Studies from the University of Nebraska Medical Center.
Outside of work, Larry loves to hunt and is an expert at taekwondo. He currently volunteers at the Global Traditional Martial Arts (GTMA) school in Junction City, Kansas. Larry is also a big fan of the Kansas City Chiefs and the Colorado Avalanche professional hockey team.
Last but not least, his advice to his patients is that we must enjoy life to the fullest as we have only one!
Becca Haugaard
Nurse Practitioner
Specialty: Wound Care
Becca Haugaard, APRN-FNP is certified in both wound care and foot care. Becca leads our Wound Care Clinic.
She Specializes In;
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Compression Therapy
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Sharps Debridement
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Adjunct Therapy Including Human Skin Equivalents and Wound Vac
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She is also certified to do routine foot care and can provide diabetic foot checks and diabetic foot care.
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Together with our vascular specialists, she also provides surgical debridement of non-healing wounds.
Abby Suddarth
Physician Assistant
Specialty: Cardiology
Abby Suddarth, PA-C, is a certified Physician Assistant who is excited to offer virtual telehealth appointments.
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She graduated from the Butler University Physician Assistant Program with a bachelor’s degree in health sciences. She initially joined Dr. Ranaweera at Mercy Regional in the fall of 2007 when her husband was stationed at Fort Riley. She has also worked in Internal Medicine and Soldier Readiness Processing.
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She enjoys spending time with her family, homeschooling their three girls, practicing her photography skills, reading, and exercising.
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Tyson Nickelson
Nurse Practitioner
Specialty: Cardiology
Tyson Nickelson, MSN, FNP-C is an advanced practice nursing provider with extensive experience in healthcare, particularly in the care of cardiac patients and in the Intensive Care Unit.
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He Specializes In:
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Cardiology
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Diseases Affecting Veins
Emily Ebert
Nurse Practitioner
Specialty: Cardiology
Emily Ebert, MSN, FNP-C
Dr. Lakshika Ranaweera
Psychiatrist
Specialty: Behavioral Health
Dr. Lakshika Ranaweera, MD, is a board-certified Psychiatrist with Manhattan Medical Group. She provides care for all forms of adult psychiatric problems. Dr. Ranaweera has a special interest in mental health related to women and pregnancy.
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Education, awards, and recognition:
Residency: Adult Psychiatry at the University of Kansas Medical Center in Kansas City, KS
Chief Resident: Veterans Affairs in Kansas City, MO
Doctor of Medicine: North Colombo Medical College in Ragama, Sri Lanka
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Outside of the office, Dr. Ranaweera enjoys traveling, music, dancing and spending time with her family.
Tonya Grider
Nurse Practitioner
Specialty: Cardiology
Tonya Grider, MSN, FNP-C
​Tonya is passionate about her role as a nurse practitioner, focusing on compassionate care and patient education, particularly in cardiac health.
Her educational background includes an Associate's Degree in Nursing from Baker University, followed by a BSN and MSN with a Family Nurse Practitioner concentration from Colorado Technical University.
Her nursing career has been focused in trauma and emergency medicine for over 25 years.
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Tonya enjoys a range of hobbies such as gardening, reading, exercising, playing the piano, and engaging in various craft projects. She is married and has three children and has recently been blessed with a grandchild.
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She is a sport enthusiast for many sports. She has a deep connection to football with her years of support for her husband's career.
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In her advice to patients, Tonya emphasizes that "faith does not make things easy; it makes them possible," reflecting her commitment to empowering patients in their health journey.
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She joined Manhattan Medical Group in 2024.
Cyra Smith
Physician Assistant
Specialty: Cardiology
Nathisha Saul
Nurse Practitioner
Specialty: Behavioral Health
Nathisha Saul APRN, PMHNP-BC
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Nathisha Saul is a Board Certified Psychiatric Mental Health Nurse Practitioner with over a decade of experience in nursing. She has worked extensively in inpatient psychiatry, outpatient behavioral health, addiction medicine, and crisis intervention, helping individuals of all ages navigate their mental health journey.
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She earned her Master of Science in Nursing with a specialization in Psychiatric Mental Health from the University of South Alabama, where she gained advanced training in psychiatric assessment, medication management, and evidence-based treatment approaches. With a strong foundation in trauma-informed care, psychotherapy, and psychopharmacology, she is passionate about providing personalized mental health care tailored to each patient’s unique needs. She believes in a patient-centered approach that fosters healing and long-term well-being.
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When she’s not caring for her patients, Nathisha enjoys spending time with her family and dogs, practicing meditation and yoga, and spending time outdoors to relax and recharge.
