About Chapter 18

This chapter of the ICD-10-CM Tabular List covers Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99). It is organized into 14 sections, each containing specific diagnosis codes used for medical billing, documentation, and statistical tracking. Click any section below to explore the codes within that range.

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