Diagnostic Services

Radiologic Diagnostic Imaging

The radiology department focuses on patient comforts, patient privacy, patient satisfaction and operational efficiency. The staff provides 24-hour coverage at UnityPoint Health – Grinnell Regional Medical Center.
Call (641) 236-2355 or email us.


GRMC operates a full laboratory with 24-hour coverage for fast inpatient results. A wide range of diagnostic tests allows physicians to diagnose cardiac concerns, cancer testing, thyroid disorders and hundreds of medical conditions. 

Outpatient laboratory services are available from 7 a.m. - 5:30 p.m. Monday through Friday and 7 a.m. - 12 p.m. on Saturday. Outpatient lab services are closed on Sunday. Questions can be directed to (641) 236-2373.

Sleep Study Center

Our accredited sleep lab offers a comprehensive diagnosis of sleep disorders. To schedule a sleep clinic appointment at GRMC, call (515) 224-3948. Melisa Coaker, MD, MA, with DSM Sleep Specialists, provides consultations and diagnosis for patients. We also partner with Practical Sleep Services. To schedule a sleep test call (515) 223-9001 or send an email

Diagnostic Cardiopulmonary

Our cardiopulmonary department offers special diagnostic procedures including Electrocardiogram (ECG), Pulmonary Function Tests (PFT) and Electroencephalogram (EEG). It also provides services for inpatients. Call (641) 236-2346 for more information.