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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