Location(s): Holton, Onaga, St. Marys
Precision Medicine & Surgical Expertise You Can Trust
At Community HealthCare System, we are dedicated to excellence across all our medical and surgical services. With advanced surgical expertise, techniques, technology, and operating suites – far above what you would typically find at a small rural hospital – we have a proven record of exceptional surgical care and outcomes. From same-day imaging and personalized treatment plans to our collaborative, multidisciplinary approach to your care, our surgical services include:
Bariatric surgery
Breast biopsies and breast cancer surgeries
Ear, nose, and throat surgery
Endoscopy procedures and colonoscopies
General surgery
Orthopedic procedures
Laparoscopic procedures
Removal of skin cancers and tumors
Podiatry surgery
Shouldice hernia repair (a technique that does not use mesh)
Trauma surgery
Urologic surgery
Anesthesia pain management services
Advanced imaging services, including wide-bore MRI, which makes imaging tests more comfortable for larger patients and those with claustrophobia
Expert and compassionate nursing care as you recover
View our Specialty Clinic Calendar or call 785-889-5039 for an appointment
Renowned Surgical Expertise for Our Community
Our surgical team is led by David Cancelada, MD, a highly skilled general surgeon with extensive experience in surgery and trauma care, including 25 years of service as a military surgeon. He performs many types of surgical procedures, from simple to highly complex, and says he loves helping rural Kansans because their "honesty, humbleness, and hard-working mentalities" remind him of his military comrades. From the military field to the fields of Kansas, Dr. Cancelada delivers precision surgical expertise you can trust.
Dr. Cancelada sees patients in Onaga every Monday and Wednesday, and appointments are also available at our St. Marys and Holton clinics. Learn more or call 785-889-5039 to schedule an appointment.
Collaborative, Patient-Centered Care
CHCS surgeons approach surgery as a collaborative effort, working closely with your primary care provider, experts in comfort and pain control (nurse anesthetists), laboratory physicians (pathologists), imaging experts (radiologists), nurses – as well as your family and caregivers. We believe this team approach leads to the best outcomes for your recovery. After surgery, our pain management experts and occupational and physical rehabilitation specialists work hand-in-hand with your surgeons and nurses to ensure your complete recovery – getting you back to the life you love.
From our clinical, nursing, and therapy teams to our nutrition, dietary and support specialists, environmental services teams, and more, we are focused on safe, effective, patient-centered care that meets your needs – in health and in life.
A Recognized Leader in Rural Health
Experience medical and surgical care excellence within your communities from a recognized leader in rural health. With a rich, 70+ year history of caring for patients across all stages and phases of life, we are frequently recognized for quality and performance excellence across our full continuum of care. Explore our awards and accreditations here.
Contact Us
Community HealthCare System
Surgery Department
Monday-Thursday, 7:30 a.m. to 4:30 p.m.; Friday 6:30 a.m. to 4:00 p.m.
Closed on holidays and weekends except for emergencies
785-889-5108
Alfredo Iloreta, MD
Medical Staff
Location: Onaga
Position: Specialty Clinic Provider
Medical Service: Medical & Surgical Care
Alfredo Iloreta, MD
Dr. Iloreta graduated from the University of St. Thomas College of Medicine and Surgery.
David Allen, MD
Medical Staff
Location: Holton
Position: Physician
Medical Services: Diabetic Care, Youth Services, Men's Health, Women's Health, Senior Care, Emergency Department, Family Medicine, Birth Center, Medical & Surgical Care
David Allen, MD
Dr. David Allen holds degrees from Kansas State University and the University of Kansas School of Medicine. He completed his residency at Via Christi Regional Medical Center in Wichita. His specialties are family medicine and obstetrics, including C-sections, GI procedures (upper and lower endoscopy), and pediatric services.
David Cancelada, MD
Medical Staff
Locations: Onaga, Holton, St. Marys
Position: Surgery
Medical Services: Specialty Clinics, Medical & Surgical Care
David Cancelada, MD
Dr. David Cancelada attended the nation’s military medical school at the Uniformed Services University of the Health Sciences (USUHS) in Bethesda, Maryland. He completed his surgical training at Brooke Army Medical Center in San Antonio, Texas. He is board-certified in both general surgery and surgical critical care. He has 25 years of experience in the U.S. Army, which included assignments in numerous military medical facilities to include the U.S. Army Burn Unit, multiple deployments to Iraq as commander of a forward surgical team, as well as Honduras and Haiti in support of the 2010 earthquake disaster. Military decorations include the Bronze Star and the Legion of Merit. He and his family moved to Kansas in 2006 when he was transferred to Fort Riley, and since leaving the military in 2010, Dr. Cancelada has continued to serve the people of Kansas as a general surgeon. Dr. Cancelada’s professional memberships include Fellowship in the American College of Surgeons (FACS), the Eastern Association for the Surgery of Trauma (EAST), and the American Society of Metabolic and Bariatric Surgery (ASMBS). His interests include trauma/critical care, bariatric and anti-reflux surgery, cancer (breast, colon), and thyroid surgery. Hospital memberships include Community HealthCare System and Stormont-Vail Medical Center (SVMC), where Dr. Cancelada is an active member of their Level 2 trauma service as well as Course Director for their Advance Trauma Life Support (ATLS) training program. Dr. Cancelada is also an assistant professor of surgery at USUHS.
Marcus Weiser, DO
Medical Staff
Location: Onaga
Position: Physician
Medical Services: Diabetic Care, Youth Services, Men's Health, Women's Health, Senior Care, Emergency Department, Family Medicine, Birth Center, Medical & Surgical Care
Marcus Weiser, DO
Dr. Marcus Weiser graduated from Bethany College with a bachelor’s degree in biology and from medical school at Kansas City University of Medicine and Biosciences. He completed his residency at Via Christi (St. Joseph and St. Francis) in Wichita and served as chief resident. Dr. Weiser is board-certified in family medicine. He is also trained to do obstetrics and performs EGDs (esophagogastroduodenoscopy), colonoscopies, and C-sections. He particularly enjoys teaching both third- and fourth-year medical students as a clinical assistant professor in the University of Kansas Medical Center Department of Family Medicine and as a clerkship preceptor for the Kansas City University of Medicine and Biosciences. Dr. Weiser enjoys caring for others in a variety of settings. “I love family medicine, and it is a privilege to serve others as a family medicine physician. I find the variety that rural family medicine offers both challenging and rewarding,” he says. Dr. Weiser was born and raised in northwest Kansas and lives in Onaga with his wife and five children. Outside of work, he enjoys spending time with his family, helping coach his kids’ sports teams, and, occasionally, golfing. He also likes basketball, hunting, fishing, shooting, and grilling or smoking meats.
Rebecca Kramer, CRNA
Medical Staff
Locations: Onaga, Holton, St. Marys
Position: Anesthesia
Medical Service: Medical & Surgical Care
Rebecca Kramer, CRNA
Rebecca Kramer is a member of the American Association of Nurse Anesthetists and the Kansas Association of Nurse Anesthetists. She holds an undergraduate degree from Wichita State University and a master's degree from Texas Wesleyan University in Fort Worth, Texas.
Rick Abbott, CRNA
Medical Staff
Locations: Onaga, Holton, St. Marys
Position: Anesthesia
Medical Service: Medical & Surgical Care
Sam Jeffers, CRNA
Medical Staff
Locations: Onaga, Holton, St. Marys
Position: Anesthesia
Medical Service: Medical & Surgical Care
Scott McCormick, CRNA
Medical Staff
Locations: Onaga, Holton, St. Marys
Position: Anesthesia
Medical Service: Medical & Surgical Care
Scott McCormick, CRNA
Scott McCormick is a member of the American Association of Nurse Anesthetists and the Kansas Association of Nurse Anesthetists. He is a registered nurse anesthetist. He graduated from Kansas Newman College in Wichita.
Timothy Gateley, DPM
Medical Staff
Location: Onaga
Position: Specialty Clinic Provider
Medical Services: Podiatry, Specialty Clinics, Medical & Surgical Care
Timothy Gateley, DPM
Timothy B. Gateley, D.P.M., is a licensed podiatrist in Topeka, Kansas who has been practicing Podiatric Medicine for over 15 years. He is a residency-trained foot surgeon offering both surgical and conservative treatments. Dr. Gateley attended the University of Oklahoma, where he received his Bachelor of Science degree in zoology in 1999. He then attended the Dr. William M. Scholl College of Podiatric Medicine in Chicago, Illinois, where he received his Doctor of Podiatric Medicine in 2003. Dr. Gateley completed a two-year surgical residency at the Leavenworth VA Medical Center, where he was the chief resident.
Tyler Grindal, MD
Medical Staff
Locations: Onaga, St. Marys
Position: Specialty Clinic Provider
Medical Services: Ear, Nose & Throat, Specialty Clinics, Medical & Surgical Care
Tyler Grindal, MD
Dr. Grindal's clinical interests are adult and pediatric earn, nose and throat and head and neck surgery. He holds a bachelor's degree in biology from Kansas State University and attended medical school at the University of Kansas. He completed his residency at the University of Florida department of otolaryngology.
Heidi Smith, DO
Medical Staff
Location: Onaga
Position: Specialty Clinic Provider
Medical Services: Medical & Surgical Care, Orthopedics
Heidi Smith, DO
Dr. Smith provides care for a wide variety of general orthopedic complaints and injuries of patients of all ages and functional status. She completed medical school at the Kansas City University of Medicine and Biosciences, plus a five-year residency at Samaritan Health Services in Corvallis, Oregon, and a year-long fellowship in sports medicine at the University of New Mexico. Her area of specialty is orthopedic surgery, and her special interest is sports medicine. She practices with Orthopaedic and Sports Medicine Center in Manhattan, Kansas.