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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  • R87.628—

    Other abnormal cytological findings on specimens from vagina

  • R87.629—

    Unspecified abnormal cytological findings in specimens from vagina

  • R87.69—

    Abnormal cytological findings in specimens from other female genital organs

  • R87.7—

    Abnormal histological findings in specimens from female genital organs

  • R87.810—

    Cervical high risk human papillomavirus (HPV) DNA test positive

  • R87.811—

    Vaginal high risk human papillomavirus (HPV) DNA test positive

  • R87.820—

    Cervical low risk human papillomavirus (HPV) DNA test positive

  • R87.821—

    Vaginal low risk human papillomavirus (HPV) DNA test positive

  • R87.89—

    Other abnormal findings in specimens from female genital organs

  • R87.9—

    Unspecified abnormal finding in specimens from female genital organs

  • R88.0—

    Cloudy (hemodialysis) (peritoneal) dialysis effluent

  • R88.8—

    Abnormal findings in other body fluids and substances

  • R89.0—

    Abnormal level of enzymes in specimens from other organs, systems and tissues

  • R89.1—

    Abnormal level of hormones in specimens from other organs, systems and tissues

  • R89.2—

    Abnormal level of other drugs, medicaments and biological substances in specimens from other organs, systems and tissues

  • R89.3—

    Abnormal level of substances chiefly nonmedicinal as to source in specimens from other organs, systems and tissues

  • R89.4—

    Abnormal immunological findings in specimens from other organs, systems and tissues

  • R89.5—

    Abnormal microbiological findings in specimens from other organs, systems and tissues

  • R89.6—

    Abnormal cytological findings in specimens from other organs, systems and tissues

  • R89.7—

    Abnormal histological findings in specimens from other organs, systems and tissues

  • R89.8—

    Other abnormal findings in specimens from other organs, systems and tissues

  • R89.9—

    Unspecified abnormal finding in specimens from other organs, systems and tissues

  • R90.0—

    Intracranial space-occupying lesion found on diagnostic imaging of central nervous system

  • R90.81—

    Abnormal echoencephalogram

  • R90.82—

    White matter disease, unspecified

  • R90.89—

    Other abnormal findings on diagnostic imaging of central nervous system

  • R91.1—

    Solitary pulmonary nodule

  • R91.8—

    Other nonspecific abnormal finding of lung field

  • R92.0—

    Mammographic microcalcification found on diagnostic imaging of breast

  • R92.1—

    Mammographic calcification found on diagnostic imaging of breast

  • R92.2—

    Inconclusive mammogram

  • R92.30—

    Dense breasts, unspecified

  • R92.311—

    Mammographic fatty tissue density, right breast

  • R92.312—

    Mammographic fatty tissue density, left breast

  • R92.313—

    Mammographic fatty tissue density, bilateral breasts

  • R92.321—

    Mammographic fibroglandular density, right breast

  • R92.322—

    Mammographic fibroglandular density, left breast

  • R92.323—

    Mammographic fibroglandular density, bilateral breasts

  • R92.331—

    Mammographic heterogeneous density, right breast

  • R92.332—

    Mammographic heterogeneous density, left breast

  • R92.333—

    Mammographic heterogeneous density, bilateral breasts

  • R92.341—

    Mammographic extreme density, right breast

  • R92.342—

    Mammographic extreme density, left breast

  • R92.343—

    Mammographic extreme density, bilateral breasts

  • R92.8—

    Other abnormal and inconclusive findings on diagnostic imaging of breast

  • R93.0—

    Abnormal findings on diagnostic imaging of skull and head, not elsewhere classified

  • R93.1—

    Abnormal findings on diagnostic imaging of heart and coronary circulation

  • R93.2—

    Abnormal findings on diagnostic imaging of liver and biliary tract

  • R93.3—

    Abnormal findings on diagnostic imaging of other parts of digestive tract

  • R93.41—

    Abnormal radiologic findings on diagnostic imaging of renal pelvis, ureter, or bladder

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