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Medical & Surgical Care

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

Alfredo Iloreta, MD

Medical Staff

Location: Onaga

Position: Specialty Clinic Provider

Medical Service: Medical & Surgical Care

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David Allen, MD

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

See My Bio
David Cancelada, MD

David Cancelada, MD

Medical Staff

Locations: Onaga, Holton, St. Marys

Position: Surgery

Medical Services: Specialty Clinics, Medical & Surgical Care

See My Bio
Marcus Weiser, DO

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

See My Bio
Rebecca Kramer, CRNA

Rebecca Kramer, CRNA

Medical Staff

Locations: Onaga, Holton, St. Marys

Position: Anesthesia

Medical Service: Medical & Surgical Care

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Rick Abbott, CRNA

Rick Abbott, CRNA

Medical Staff

Locations: Onaga, Holton, St. Marys

Position: Anesthesia

Medical Service: Medical & Surgical Care

Sam Jeffers, CRNA

Sam Jeffers, CRNA

Medical Staff

Locations: Onaga, Holton, St. Marys

Position: Anesthesia

Medical Service: Medical & Surgical Care

Scott McCormick, CRNA

Scott McCormick, CRNA

Medical Staff

Locations: Onaga, Holton, St. Marys

Position: Anesthesia

Medical Service: Medical & Surgical Care

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Timothy Gateley, DPM

Timothy Gateley, DPM

Medical Staff

Location: Onaga

Position: Specialty Clinic Provider

Medical Services: Podiatry, Specialty Clinics, Medical & Surgical Care

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Tyler Grindal, MD

Tyler Grindal, MD

Medical Staff

Locations: Onaga, St. Marys

Position: Specialty Clinic Provider

Medical Services: Ear, Nose & Throat, Specialty Clinics, Medical & Surgical Care

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Heidi Smith, DO

Heidi Smith, DO

Medical Staff

Location: Onaga

Position: Specialty Clinic Provider

Medical Services: Medical & Surgical Care, Orthopedics

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