Does Medicare Part B Cover Diagnostic X-Ray And Lab? 
Medicare Part B covers 80 % of diagnostic X-ray and labs that are ordered by a physician as part of an outpatient setting . If you are an inpatient , these are covered under your Medicare Part A hospitalization bill . There are ways to reduce the 20 % you would owe under Part B. Speak to your local agent to determine whether a Medicare Advantage plan or a Medicare Supplement makes the most sense for your situation . 