Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings
ICD-10-CM codes R00-R99
Covers symptoms and signs that do not yet have a definitive diagnosis, including chest pain, abdominal pain, fever, cough, headache, fatigue, and abnormal lab results. These codes are commonly used in emergency and outpatient settings when a workup is still in progress. Chest pain (R07) and abdominal pain (R10) are among the top reasons for ER visits.
R00-R09
Symptoms and Signs Involving the Circulatory and Respiratory Systems
R10-R19
Symptoms and Signs Involving the Digestive System and Abdomen
R10Abdominal and pelvic pain
R11Nausea and vomiting
R12Heartburn
R13Aphagia and dysphagia
R14Flatulence and related conditions
R15Fecal incontinence
R16Hepatomegaly and splenomegaly, not elsewhere classified
R17Unspecified jaundice
R18Ascites
R19Oth symptoms and signs involving the dgstv sys 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 Genitourinary System
R40-R46
Symptoms and Signs Involving Cognition, Perception, Emotional State and Behavior
R40Somnolence, stupor and coma
R41Oth symptoms and signs w cognitive functions and awareness
R42Dizziness and giddiness
R43Disturbances of smell and taste
R44Oth symptoms and signs w general sensations and perceptions
R45Symptoms and signs involving emotional state
R46Symptoms and signs involving appearance and behavior
R47-R49
Symptoms and Signs Involving Speech and Voice
R50-R69
General Symptoms and Signs
R50Fever of other and unknown origin
R51Headache
R52Pain, unspecified
R53Malaise and fatigue
R54Age-related physical debility
R55Syncope and collapse
R56Convulsions, not elsewhere classified
R57Shock, not elsewhere classified
R58Hemorrhage, not elsewhere classified
R59Enlarged lymph nodes
R60Edema, not elsewhere classified
R61Generalized hyperhidrosis
R62Lack of expected normal physiol dev in childhood and adults
R63Symptoms and signs concerning food and fluid intake
R64Cachexia
R65Symp and signs specifically assoc w sys inflam and infct
R68Other general symptoms and signs
R69Illness, unspecified
R70-R79
Abnormal Findings on Examination of Blood
R70Elev erythro sedim and abnormality of plasma viscosity
R71Abnormality of red blood cells
R73Elevated blood glucose level
R74Abnormal serum enzyme levels
R75Inconclusive laboratory evidence of human immunodef virus
R76Other abnormal immunological findings in serum
R77Other abnormalities of plasma proteins
R78Find of drugs and oth substnc, not normally found in blood
R79Other abnormal findings of blood chemistry
R80-R82
Abnormal Findings on Examination of Urine
R83-R89
Abnormal Findings on Examination of Other Body Fluids
R83Abnormal findings in cerebrospinal fluid
R84Abnormal findings in specimens from resp org/thrx
R85Abnormal findings in specimens from dgstv org/abd cav
R86Abnormal findings in specimens from male genital organs
R87Abnormal findings in specimens from female genital organs
R88Abnormal findings in other body fluids and substances
R89Abnormal findings in specimens from oth org/tiss
R90-R94
Abnormal Findings on Diagnostic Imaging and in Function Studies
R97-R97
Abnormal Tumor Markers
R99-R99
Ill-Defined and Unknown Cause of Mortality
Frequently Asked Questions
What ICD-10 codes are in Chapter 18?
Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings covers ICD-10-CM codes R00-R99. It contains 14 code blocks with 89 top-level categories.
What conditions does ICD-10 Chapter 18 cover?
Covers symptoms and signs that do not yet have a definitive diagnosis, including chest pain, abdominal pain, fever, cough, headache, fatigue, and abnormal lab results. These codes are commonly used in emergency and outpatient settings when a workup is still in progress. Chest pain (R07) and abdominal pain (R10) are among the top reasons for ER visits. This chapter includes codes from R00-R99.
How many code blocks are in Chapter 18?
Chapter 18 has 14 code blocks: R00-R09 (Symptoms and Signs Involving the Circulatory and Respiratory Systems), R10-R19 (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), and 10 more.
Is there an ICD-11 equivalent of ICD-10 Chapter 18?
ICD-11 reorganizes many chapters compared to ICD-10. Some conditions in Chapter 18 may appear in different ICD-11 chapters. Use the ICD-10 to ICD-11 converter to find specific code equivalents.
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