All ICD10 Codes
Chapter 18

R00–R99: Symptoms, Signs and Abnormal Clinical and Laboratory Findings

Symptoms, Signs and Abnormal Clinical and Laboratory Findings diagnostic classification updated for 2026.

Chapter Instructions

Excludes2(Not included here. Code separately if applicable.)
  • abnormal findings on antenatal screening of mother (O28.-)
  • certain conditions originating in the perinatal period (P04-P96)
  • signs and symptoms classified in the body system chapters
  • signs and symptoms of breast (N63, N64.5)
All CodesBillable Only
Internal Codes
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  • R53.82|

    Chronic fatigue, unspecified

  • R53.83|

    Other fatigue

  • R54|

    Age-related physical debility

  • R55|

    Syncope and collapse

  • R56|

    Convulsions, not elsewhere classified

  • R56.0|

    Febrile convulsions

  • R56.00|

    Simple febrile convulsions

  • R56.01|

    Complex febrile convulsions

  • R56.1|

    Post traumatic seizures

  • R56.9|

    Unspecified convulsions

  • R57|

    Shock, not elsewhere classified

  • R57.0|

    Cardiogenic shock

  • R57.1|

    Hypovolemic shock

  • R57.8|

    Other shock

  • R57.9|

    Shock, unspecified

  • R58|

    Hemorrhage, not elsewhere classified

  • R59|

    Enlarged lymph nodes

  • R59.0|

    Localized enlarged lymph nodes

  • R59.1|

    Generalized enlarged lymph nodes

  • R59.9|

    Enlarged lymph nodes, unspecified

  • R60|

    Edema, not elsewhere classified

  • R60.0|

    Localized edema

  • R60.1|

    Generalized edema

  • R60.9|

    Edema, unspecified

  • R61|

    Generalized hyperhidrosis

  • R62|

    Lack of expected normal physiological development in childhood and adults

  • R62.0|

    Delayed milestone in childhood

  • R62.5|

    Other and unspecified lack of expected normal physiological development in childhood

  • R62.50|

    Unspecified lack of expected normal physiological development in childhood

  • R62.51|

    Failure to thrive (child)

  • R62.52|

    Short stature (child)

  • R62.59|

    Other lack of expected normal physiological development in childhood

  • R62.7|

    Adult failure to thrive

  • R63|

    Symptoms and signs concerning food and fluid intake

  • R63.0|

    Anorexia

  • R63.1|

    Polydipsia

  • R63.2|

    Polyphagia

  • R63.3|

    Feeding difficulties

  • R63.30|

    Feeding difficulties, unspecified

  • R63.31|

    Pediatric feeding disorder, acute

  • R63.32|

    Pediatric feeding disorder, chronic

  • R63.39|

    Other feeding difficulties

  • R63.4|

    Abnormal weight loss

  • R63.5|

    Abnormal weight gain

  • R63.6|

    Underweight

  • R63.8|

    Other symptoms and signs concerning food and fluid intake

  • R64|

    Cachexia

  • R65|

    Symptoms and signs specifically associated with systemic inflammation and infection

  • R65.1|

    Systemic inflammatory response syndrome (SIRS) of non-infectious origin

  • R65.10|

    Systemic inflammatory response syndrome (SIRS) of non-infectious origin without acute organ dysfunction

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