1. R53 Malaise and fatigue

    1. R53.0 Neoplastic (malignant) related fatigue

    2. R53.1 Weakness

      Inclusion term(s):

      • Asthenia NOS
    3. R53.2 Functional quadriplegia

      Inclusion term(s):

      • Complete immobility due to severe physical disability or frailty
    4. R53.8 Other malaise and fatigue

      1. R53.81 Other malaise

        Inclusion term(s):

        • Chronic debility
        • Debility NOS
        • General physical deterioration
        • Malaise NOS
        • Nervous debility
      2. R53.82 Chronic fatigue, unspecified

      3. R53.83 Other fatigue

        Inclusion term(s):

        • Fatigue NOS
        • Lack of energy
        • Lethargy
        • Tiredness
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.