U.S. category index · FY 2027

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.

R00

Abnormalities of heart beat

R01

Cardiac murmurs and other cardiac sounds

R03

Abnormal blood-pressure reading, without diagnosis

R04

Hemorrhage from respiratory passages

R05

Cough

R06

Abnormalities of breathing

R07

Pain in throat and chest

R09

Other symptoms and signs involving the circulatory and respiratory system

R10

Abdominal and pelvic pain

R11

Nausea and vomiting

R12

Heartburn

R13

Aphagia and dysphagia

R14

Flatulence and related conditions

R15

Fecal incontinence

R16

Hepatomegaly and splenomegaly, not elsewhere classified

R17

Unspecified jaundice

R18

Ascites

R19

Other symptoms and signs involving the digestive system and abdomen

R20

Disturbances of skin sensation

R21

Rash and other nonspecific skin eruption

R22

Localized swelling, mass and lump of skin and subcutaneous tissue

R23

Other skin changes

R25

Abnormal involuntary movements

R26

Abnormalities of gait and mobility

R27

Other lack of coordination

R29

Other symptoms and signs involving the nervous and musculoskeletal systems

R30

Pain associated with micturition

R31

Hematuria

R32

Unspecified urinary incontinence

R33

Retention of urine

R34

Anuria and oliguria

R35

Polyuria

R36

Urethral discharge

R37

Sexual dysfunction, unspecified

R39

Other and unspecified symptoms and signs involving the genitourinary system

R40

Somnolence, stupor and coma

R41

Other symptoms and signs involving cognitive functions and awareness

R42

Dizziness and giddiness

R43

Disturbances of smell and taste

R44

Other symptoms and signs involving general sensations and perceptions

R45

Symptoms and signs involving emotional state

R46

Symptoms and signs involving appearance and behavior

R47

Speech disturbances, not elsewhere classified

R48

Dyslexia and other symbolic dysfunctions, not elsewhere classified

R49

Voice and resonance disorders

R50

Fever of other and unknown origin

R51

Headache

R52

Pain, unspecified

R53

Malaise and fatigue

R54

Age-related physical debility

R55

Syncope and collapse

R56

Convulsions, not elsewhere classified

R57

Shock, not elsewhere classified

R58

Hemorrhage, not elsewhere classified

R59

Enlarged lymph nodes

R60

Edema, not elsewhere classified

R61

Generalized hyperhidrosis

R62

Lack of expected normal physiological development in childhood and adults

R63

Symptoms and signs concerning food and fluid intake

R64

Cachexia

R65

Symptoms and signs specifically associated with systemic inflammation and infection

R68

Other general symptoms and signs

R69

Illness, unspecified

R70

Elevated erythrocyte sedimentation rate and abnormality of plasma viscosity

R71

Abnormality of red blood cells

R73

Elevated blood glucose level

R74

Abnormal serum enzyme levels

R75

Inconclusive laboratory evidence of human immunodeficiency virus [HIV]

R76

Other abnormal immunological findings in serum

R77

Other abnormalities of plasma proteins

R78

Findings of drugs and other substances, not normally found in blood

R79

Other abnormal findings of blood chemistry

R80

Proteinuria

R81

Glycosuria

R82

Other and unspecified abnormal findings in urine

R83

Abnormal findings in cerebrospinal fluid

R84

Abnormal findings in specimens from respiratory organs and thorax

R85

Abnormal findings in specimens from digestive organs and abdominal cavity

R86

Abnormal findings in specimens from male genital organs

R87

Abnormal findings in specimens from female genital organs

R88

Abnormal findings in other body fluids and substances

R89

Abnormal findings in specimens from other organs, systems and tissues

R90

Abnormal findings on diagnostic imaging of central nervous system

R91

Abnormal findings on diagnostic imaging of lung

R92

Abnormal and inconclusive findings on diagnostic imaging of breast

R93

Abnormal findings on diagnostic imaging of other body structures

R94

Abnormal results of function studies

R97

Abnormal tumor markers

R99

Ill-defined and unknown cause of mortality

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

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 source

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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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