In simple words: This code is used when someone feels overly tired for no obvious medical reason.

This code captures instances of fatigue that are not due to normal exertion or other clearly defined medical conditions. It is commonly used when patients report excessive tiredness that impacts their daily activities but does not fall under more specific fatigue-related diagnoses.

Example 1: A patient presents with persistent fatigue for several months, impacting their daily life. After extensive testing, no underlying medical cause is found. The physician documents "other fatigue.", A patient undergoing chemotherapy experiences extreme fatigue beyond what is typically expected. The oncologist documents this using R53.83., A patient reports persistent lethargy and lack of energy, interfering with work and social activities. No specific medical condition is identified after a thorough evaluation, so the physician codes the fatigue as R53.83.

Document the patient's described symptoms of fatigue, including duration, severity, and impact on daily activities. Ensure no other medical condition explains the fatigue before using this code. Note any relevant test results and rule out other potential causes.

** This code is a billable/specific ICD-10-CM code and should be used to indicate a diagnosis for reimbursement purposes. ICD-9 code 780.79 is the equivalent code.