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.
Categories beginning with R
Open a category to continue through its complete hierarchy of more specific codes.
R00Abnormalities of heart beatR01Cardiac murmurs and other cardiac soundsR03Abnormal blood-pressure reading, without diagnosisR04Hemorrhage from respiratory passagesR05CoughR06Abnormalities of breathingR07Pain in throat and chestR09Other symptoms and signs involving the circulatory and respiratory systemR10Abdominal and pelvic painR11Nausea and vomitingR12HeartburnR13Aphagia and dysphagiaR14Flatulence and related conditionsR15Fecal incontinenceR16Hepatomegaly and splenomegaly, not elsewhere classifiedR17Unspecified jaundiceR18AscitesR19Other symptoms and signs involving the digestive system and abdomenR20Disturbances of skin sensationR21Rash and other nonspecific skin eruptionR22Localized swelling, mass and lump of skin and subcutaneous tissueR23Other skin changesR25Abnormal involuntary movementsR26Abnormalities of gait and mobilityR27Other lack of coordinationR29Other symptoms and signs involving the nervous and musculoskeletal systemsR30Pain associated with micturitionR31HematuriaR32Unspecified urinary incontinenceR33Retention of urineR34Anuria and oliguriaR35PolyuriaR36Urethral dischargeR37Sexual dysfunction, unspecifiedR39Other and unspecified symptoms and signs involving the genitourinary systemR40Somnolence, stupor and comaR41Other symptoms and signs involving cognitive functions and awarenessR42Dizziness and giddinessR43Disturbances of smell and tasteR44Other symptoms and signs involving general sensations and perceptionsR45Symptoms and signs involving emotional stateR46Symptoms and signs involving appearance and behaviorR47Speech disturbances, not elsewhere classifiedR48Dyslexia and other symbolic dysfunctions, not elsewhere classifiedR49Voice and resonance disordersR50Fever of other and unknown originR51HeadacheR52Pain, unspecifiedR53Malaise and fatigueR54Age-related physical debilityR55Syncope and collapseR56Convulsions, not elsewhere classifiedR57Shock, not elsewhere classifiedR58Hemorrhage, not elsewhere classifiedR59Enlarged lymph nodesR60Edema, not elsewhere classifiedR61Generalized hyperhidrosisR62Lack of expected normal physiological development in childhood and adultsR63Symptoms and signs concerning food and fluid intakeR64CachexiaR65Symptoms and signs specifically associated with systemic inflammation and infectionR68Other general symptoms and signsR69Illness, unspecifiedR70Elevated erythrocyte sedimentation rate and abnormality of plasma viscosityR71Abnormality of red blood cellsR73Elevated blood glucose levelR74Abnormal serum enzyme levelsR75Inconclusive laboratory evidence of human immunodeficiency virus [HIV]R76Other abnormal immunological findings in serumR77Other abnormalities of plasma proteinsR78Findings of drugs and other substances, not normally found in bloodR79Other abnormal findings of blood chemistryR80ProteinuriaR81GlycosuriaR82Other and unspecified abnormal findings in urineR83Abnormal findings in cerebrospinal fluidR84Abnormal findings in specimens from respiratory organs and thoraxR85Abnormal findings in specimens from digestive organs and abdominal cavityR86Abnormal findings in specimens from male genital organsR87Abnormal findings in specimens from female genital organsR88Abnormal findings in other body fluids and substancesR89Abnormal findings in specimens from other organs, systems and tissuesR90Abnormal findings on diagnostic imaging of central nervous systemR91Abnormal findings on diagnostic imaging of lungR92Abnormal and inconclusive findings on diagnostic imaging of breastR93Abnormal findings on diagnostic imaging of other body structuresR94Abnormal results of function studiesR97Abnormal tumor markersR99Ill-defined and unknown cause of mortalitySource and release
- Data release
- U.S. ICD-10-CM · FY 2027
- Effective date
- Oct 1, 2026
- Publisher
- Vero Scribe Inc.
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.
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.