Circular 06/2026
Chapter XVIII — Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
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R00-R09 — Symptoms and signs involving the circulatory and respiratory systems
R00Abnormalities of heart beatR01Cardiac murmurs and other cardiac soundsR02Gangrene, not elsewhere classifiedR03Abnormal blood-pressure reading, without diagnosisR04Haemorrhage from respiratory passagesR05CoughR06Abnormalities of breathingR07Pain in throat and chestR09Other symptoms and signs involving the circulatory and respiratory systems
R10-R19 — Symptoms and signs involving the digestive system and abdomen
R10Abdominal and pelvic painR11Nausea and vomitingR12HeartburnR13DysphagiaR14Flatulence and related conditionsR15Faecal incontinenceR16Hepatomegaly and splenomegaly, not elsewhere classifiedR17Hyperbilirubinaemia, with or without jaundice, not elsewhere classifiedR18AscitesR19Other symptoms and signs involving the digestive system and abdomen
R20-R23 — Symptoms and signs involving the skin and subcutaneous tissue
R25-R29 — Symptoms and signs involving the nervous and musculoskeletal systems
R30-R39 — Symptoms and signs involving the urinary system
R40-R46 — Symptoms and signs involving cognition, perception, emotional state and behaviour
R40Somnolence, stupor and comaR41Other symptoms and signs involving cognitive functions and awarenessR42Dizziness and giddinessR43Disturbances of smell and tasteR44Other symptoms and signs involving general sensations and perceptionsR45Symptoms and signs involving emotional stateR46Symptoms and signs involving appearance and behaviour
R47-R49 — Symptoms and signs involving speech and voice
R50-R69 — General symptoms and signs
R50Fever of other and unknown originR51HeadacheR52Pain, not elsewhere classifiedR53Malaise and fatigueR54SenilityR55Syncope and collapseR56Convulsions, not elsewhere classifiedR57Shock, not elsewhere classifiedR58Haemorrhage, not elsewhere classifiedR59Enlarged lymph nodesR60Oedema, not elsewhere classifiedR61HyperhidrosisR62Lack of expected normal physiological developmentR63Symptoms and signs concerning food and fluid intakeR64CachexiaR65Systemic Inflammatory Response Syndrome [SIRS]R68Other general symptoms and signsR69Unknown and unspecified causes of morbidity
R70-R79 — Abnormal findings on examination of blood, without diagnosis
R70Elevated erythrocyte sedimentation rate and abnormality of plasma viscosityR71Abnormality of red blood cellsR72Abnormality of white blood cells, not elsewhere classifiedR73Elevated blood glucose levelR74Abnormal serum enzyme levelsR75Laboratory evidence of human immunodeficiency virus [HIV]R76Other abnormal immunological findings in serumR77Other abnormalities of plasma proteinsR78Findings of drugs and other substances, not normally found in bloodR79Other abnormal findings of blood chemistry
R80-R82 — Abnormal findings on examination of urine, without diagnosis
R83-R89 — Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis
R83Abnormal findings in cerebrospinal fluidR84Abnormal findings in specimens from respiratory organs and thoraxR85Abnormal findings in specimens from digestive organs and abdominal cavityR86Abnormal findings in specimens from male genital organsR87Abnormal findings in specimens from female genital organsR89Abnormal findings in specimens from other organs, systems and tissues