R55 — Syncope and collapse

R55

ICD-10 Chapter 18: Symptoms, Signs & Abnormal Findings — illustrative image — Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00–R99) — illustrative image

What this code means

Syncope is a brief loss of consciousness (fainting) from a temporary fall in blood flow to the brain; collapse is a similar fall.

Also called: syncope, fainting, blackout, collapse.

When this code is used

Used for syncope and collapse.

Where it sits in ICD-10-CM

Code R55 belongs to Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified, which covers codes R00–R99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Related symptoms

Dizziness

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Frequently asked questions

What is ICD-10-CM code R55?

R55 is the ICD-10-CM diagnosis code for “Syncope and collapse”. Syncope is a brief loss of consciousness (fainting) from a temporary fall in blood flow to the brain; collapse is a similar fall.

When is code R55 used?

Used for syncope and collapse. It belongs to Chapter 18 of ICD-10-CM (Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.