R ICD-10-CM Categories: Category Index
Browse 89 top-level ICD-10-CM categories beginning with R, then follow their complete FY 2027 child-code hierarchies.
Complete category list
Categories beginning with R
Open a category to continue through its complete hierarchy of more specific codes.
R00Abnormalities of heart beat
R01Cardiac murmurs and other cardiac sounds
R03Abnormal blood-pressure reading, without diagnosis
R04Hemorrhage from respiratory passages
R05Cough
R06Abnormalities of breathing
R07Pain in throat and chest
R09Other symptoms and signs involving the circulatory and respiratory system
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
R19Other symptoms and signs involving the digestive system and abdomen
R20Disturbances of skin sensation
R21Rash and other nonspecific skin eruption
R22Localized swelling, mass and lump of skin and subcutaneous tissue
R23Other skin changes
R25Abnormal involuntary movements
R26Abnormalities of gait and mobility
R27Other lack of coordination
R29Other symptoms and signs involving the nervous and musculoskeletal systems
R30Pain associated with micturition
R31Hematuria
R32Unspecified urinary incontinence
R33Retention of urine
R34Anuria and oliguria
R35Polyuria
R36Urethral discharge
R37Sexual dysfunction, unspecified
R39Other and unspecified symptoms and signs involving the genitourinary system
R40Somnolence, stupor and coma
R41Other symptoms and signs involving cognitive functions and awareness
R42Dizziness and giddiness
R43Disturbances of smell and taste
R44Other symptoms and signs involving general sensations and perceptions
R45Symptoms and signs involving emotional state
R46Symptoms and signs involving appearance and behavior
R47Speech disturbances, not elsewhere classified
R48Dyslexia and other symbolic dysfunctions, not elsewhere classified
R49Voice and resonance disorders
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 physiological development in childhood and adults
R63Symptoms and signs concerning food and fluid intake
R64Cachexia
R65Symptoms and signs specifically associated with systemic inflammation and infection
R68Other general symptoms and signs
R69Illness, unspecified
R70Elevated erythrocyte sedimentation rate and abnormality of plasma viscosity
R71Abnormality of red blood cells
R73Elevated blood glucose level
R74Abnormal serum enzyme levels
R75Inconclusive laboratory evidence of human immunodeficiency virus [HIV]
R76Other abnormal immunological findings in serum
R77Other abnormalities of plasma proteins
R78Findings of drugs and other substances, not normally found in blood
R79Other abnormal findings of blood chemistry
R80Proteinuria
R81Glycosuria
R82Other and unspecified abnormal findings in urine
R83Abnormal findings in cerebrospinal fluid
R84Abnormal findings in specimens from respiratory organs and thorax
R85Abnormal findings in specimens from digestive organs and abdominal cavity
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 other organs, systems and tissues
R90Abnormal findings on diagnostic imaging of central nervous system
R91Abnormal findings on diagnostic imaging of lung
R92Abnormal and inconclusive findings on diagnostic imaging of breast
R93Abnormal findings on diagnostic imaging of other body structures
R94Abnormal results of function studies
R97Abnormal tumor markers
R99Ill-defined and unknown cause of mortality
Transparency
Source and release
This category index is generated from Vero’s repository-backed ICD-10-CM hierarchy. Every listed category is a top-level record, and each linked category page exposes its direct child codes.
Review the CDC/NCHS ICD-10-CM sourceCategory navigation
Frequently asked questions
Which ICD-10-CM categories begin with R?
This index lists 89 top-level categories beginning with R from Vero’s FY 2027 U.S. ICD-10-CM reference dataset.
How do I find a more specific R code?
Open a category below, then follow its linked child-code hierarchy until you reach the code supported by the documentation.
Which ICD-10-CM release does this R index use?
The index uses the FY 2027 U.S. ICD-10-CM release and the repository-backed hierarchy displayed on each linked code page.
Is every R category billable?
No. These are top-level categories used for navigation. Follow the hierarchy to a sufficiently specific code and confirm the active code set, official guidance, and payer requirements.
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