St. Luke's Clinic

St. Luke's Clinic – Colon and Rectal Surgery is dedicated to providing advanced care for acute and chronic health conditions of the colon, rectum, and anus.

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Colon and Rectal Surgery
125 E. Idaho Street
Suite 303
Boise, Idaho 83712
(208) 381-9350
Directions / Map

Office Hours
Mon - Fri, 9 a.m.-5 p.m.

Dr. Karsten specializes in colon and rectal surgery, including:

  • Advanced laparoscopic/minimally invasive surgery
  • Diagnosis and management of colon and rectal cancer
  • Diverticular disease
  • Inflammatory bowel disease
  • Hemorrhoids
  • Abscesses and fistulas
  • Disorders of continence
  • Other benign and malignant anorectal conditions

New Patients / Appointments
We are accepting new patients.

What is Colon and Rectal Surgery?
Colon and rectal surgeons are experts in the surgical and non-surgical treatment of diseases and conditions of the colon, rectum, and anus. They have completed advanced training in the treatment of colon and rectal problems in addition to full training in general surgery. They treat benign and malignant conditions, perform routine screening examinations, and surgically treat problems when necessary.

St. Luke's Clinics
St. Luke’s Clinics are an integrated network of highly skilled health care professionals in locations throughout our region.

Our Medical Providers

Benjamin J. Karsten, MD Benjamin J. Karsten, MD is board certified in colon and rectal surgery, and has special interests in advanced laparoscopic techniques for colon and rectal cancer. Dr. Karsten earned his medical degree from the University of Utah School of Medicine and completed his residency in general surgery at Harbor-UCLA Medical Center. He completed his fellowship training in colon and rectal surgery at the University of Medicine and Dentistry / Robert Wood Johnson School of Medicine.

Your Appointment
We try to stay on time, as a courtesy to you and others. Since paperwork may take a few minutes, please arrive early. As emergencies do occur, there may be occasions when your appointment time will be delayed. We will always try to keep you informed in the event of a delay, and will be happy to reschedule your appointment, if you prefer. We ask that you respect the appointment time we have reserved for you, and call 24 hours ahead to cancel or change appointments so that others may be helped during that time.

Communication with your provider is extremely important. It may be helpful for you to write down questions for your doctor or nurse practitioner prior to your visit. Bring a list of medications and the dosages, or bring the bottles with you.

Make sure you understand any instructions you are given. If clarification is needed, review your instructions with the provider or medical assistant before you leave. If you aren’t doing well after your visit, we want to hear from you. Our goal is to improve your health.

Insurance Plans
We accept most insurance plans, including Medicare, in-state Medicaid, Tricare, Blue Cross/Blue Shield, and others.

Medication Refills
Talk with your provider at each visit to be sure your prescriptions are up to date. When you need to refill your prescriptions, you can request them directly through your myChart account.

You can also request a refill by contacting your pharmacy. Your pharmacy will then contact our office for verification and approval. For patient safety, narcotics cannot be refilled outside of office hours. Talk with your provider before your prescription runs out, and please allow 48 hours for refills.

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