Mercy Medical Center Sioux City

Specialty Clinics

All specialty clinics at Oakland Mercy Hospital are developed to provide patients the most convenient and accessible health care possible. Physicians representing a variety of medical specialties care for patients and conduct medical practice in areas ranging from Cardiology to Urology.

The following list of medical specialties and services represents the wide array of care that Oakland Mercy Hospital provides to our communities.

If you would like to schedule an appointment with any of these specialists, please call the hospital (402)-685-5601 and ask to speak with Laura Murphy.

  Cardiology Dr. Douglas Guy

Phone 712-294-7020

  Available twice a month   Fax     712-294-7022
  Oncology Dr. Susan Kambhu Phone 402-552-9800
  1st Saturday of the month   Fax     402-552-9898
  Surgery / GI Dr. Paul Johnson Phone 605-217-5500
  Everyother Wenesday  

Fax     605-217-5513


Dr. David Daniels

Phone 605-217-7000

 Every 4 Weeks

Fax     605-217-5513


Dr. Kham Ung

Phone 712-255-0502

Once a Month

Fax     712-258-9977

     Some insurance companiesrequire a referal to see a specialist.

                    Please check with your insurance company.


Cardiology & Cardiovascular
A cardiologist is an internist who specializes in the prevention, diagnosis and medical treatment of diseases of the heart.
A gastroenterologist is an internist that focuses on the function and disorders of the GI system, which includes the esophagus, stomach, pancreas, intestines and liver. 
A hematologist / oncologist diagnoses and treats diseases of the blood and blood forming organs and all cancers of the body.