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
Browse by Section14 Sections
- R00-R09Symptoms and signs involving the circulatory and respiratory systems
- R10-R19Symptoms and signs involving the digestive system and abdomen
- R20-R23Symptoms and signs involving the skin and subcutaneous tissue
- R25-R29Symptoms and signs involving the nervous and musculoskeletal systems
- R30-R39Symptoms and signs involving the genitourinary system
- R40-R46Symptoms and signs involving cognition, perception, emotional state and behavior
- R47-R49Symptoms and signs involving speech and voice
- R50-R69General symptoms and signs
- R70-R79Abnormal findings on examination of blood, without diagnosis
- R80-R82Abnormal findings on examination of urine, without diagnosis
- R83-R89Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis
- R90-R94Abnormal findings on diagnostic imaging and in function studies, without diagnosis
- R97Abnormal tumor markers
- R99Ill-defined and unknown cause of mortality