Why Spectrum With over 200 top specialists in anesthesiology, pathology, radiation oncology, radiology, and interventional radiology, Spectrum is committed to providing a broad range of advanced expertise to our patients, communities, and hospital partners. As a result of our size, the diverse services we offer, and the breadth of our geographic coverage, Spectrum has a seat at the table with healthcare systems, employers, insurers, managed care organizations, and policymakers.