Some test results are available quickly. Others may take hours or several days.
Many healthcare systems release results in a patient portal, sometimes before a healthcare professional has discussed them with you.
A result marked high, low, or abnormal is outside the listed reference range. That flag alone does not tell you whether the result signals a health problem. Reference ranges can vary between laboratories and may depend on the person. Your healthcare professional considers the result along with your symptoms, health history, medications, examination, and other test results.
A high or low laboratory result does not automatically mean you have a serious medical problem. A result within the expected range does not always mean everything is normal. Your healthcare professional looks at your results together with your symptoms, medical history, and other findings.
On numerical tests, high and low flags generally mean a value is outside the laboratory's reference range. Other tests may use terms such as positive, negative, abnormal, or inconclusive.