ICD-10-CM Book 2026 Edition
Chapters ICD-10-CM Book Table of Content /
chapter 18 R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified /
R50-R69 General symptoms and signs /
Billable ICD-10-CM Code R55
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R55
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Syncope and collapse 
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Blackout
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Fainting
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Vasovagal attack
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excludes1
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| cardiogenic shock (R57.0) |
| carotid sinus syncope (G90.01) |
| heat syncope (T67.1) |
| neurocirculatory asthenia (F45.8) |
| neurogenic orthostatic hypotension (G90.3) |
| orthostatic hypotension (I95.1) |
| postprocedural shock (T81.1-) |
| psychogenic syncope (F48.8) |
| shock NOS (R57.9) |
| shock complicating or following abortion or ectopic or molar pregnancy (O00-O07, O08.3) |
| shock complicating or following labor and delivery (O75.1) |
| Stokes-Adams attack (I45.9) |
| unconsciousness NOS (R40.2-) |
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