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Chapter 18

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

R00–R99

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FY 2027 effective October 1, 2026 · 89 categories in this chapter

Blocks in This Chapter

ICD-10-CM groups this chapter's categories into 14 blocks of three-character categories.

  1. R00 –R09 Symptoms and signs involving the circulatory and respiratory systems
  2. R10 –R19 Symptoms and signs involving the digestive system and abdomen
  3. R20 –R23 Symptoms and signs involving the skin and subcutaneous tissue
  4. R25 –R29 Symptoms and signs involving the nervous and musculoskeletal systems
  5. R30 –R39 Symptoms and signs involving the genitourinary system
  6. R40 –R46 Symptoms and signs involving cognition, perception, emotional state and behavior
  7. R47 –R49 Symptoms and signs involving speech and voice
  8. R50 –R69 General symptoms and signs
  9. R70 –R79 Abnormal findings on examination of blood, without diagnosis
  10. R80 –R82 Abnormal findings on examination of urine, without diagnosis
  11. R83 –R89 Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis
  12. R90 –R94 Abnormal findings on diagnostic imaging and in function studies, without diagnosis
  13. R97 Abnormal tumor markers
  14. R99 Ill-defined and unknown cause of mortality

Categories

Symptoms and signs involving the circulatory and respiratory systems (R00-R09)

Symptoms and signs involving the digestive system and abdomen (R10-R19)

Symptoms and signs involving the skin and subcutaneous tissue (R20-R23)

Symptoms and signs involving the nervous and musculoskeletal systems (R25-R29)

Symptoms and signs involving the genitourinary system (R30-R39)

Symptoms and signs involving cognition, perception, emotional state and behavior (R40-R46)

Symptoms and signs involving speech and voice (R47-R49)

General symptoms and signs (R50-R69)

Abnormal findings on examination of blood, without diagnosis (R70-R79)

Abnormal findings on examination of urine, without diagnosis (R80-R82)

Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis (R83-R89)

Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94)

Abnormal tumor markers (R97)

Ill-defined and unknown cause of mortality (R99)