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R55 ICD-10-CM Code: Syncope and collapse

R55 is the billable ICD-10-CM code for “Syncope and collapse” in the FY 2027 U.S. code set, effective Oct 1, 2026.

Official description

R55

Syncope and collapse

ICD-10-CM diagnosis code · United States clinical modification

Coding tips for R55

Fainting, blackout or a vasovagal attack, when no more specific cause is documented.

What to document

  • Record the cause when it’s known: orthostatic hypotension (I95.1), carotid sinus syncope (G90.01) and heat syncope (T67.1-) have their own codes and are excluded from R55.
  • Once a related diagnosis is confirmed, code the diagnosis rather than the symptom.

Watch for

  • Unconsciousness NOS is R40.20, not R55.
  • Psychogenic syncope is F48.8.

Codes that look alike

I95.1Orthostatic hypotensionG90.01Carotid sinus syncopeT67.1XXAHeat syncope, initial encounterR40.20Unspecified comaUnconsciousness or coma NOS.
ICD-10-CM notes for R55ICD-10-CM Official Guidelines, FY 2027, Section I.B.4 and I.B.5

Where R55 sits

  1. 1

    Chapter 18

    Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

  2. 2

    Section

    General symptoms and signs (R50-R69)

  3. 3

    Category R55

    Syncope and collapse

  4. 4

    Code R55

    Syncope and collapse

Notes for this code

Inclusion terms

  • Blackout
  • Fainting
  • Vasovagal attack

Code first

No “code first” instruction is listed for R55.

Use additional code

No “use additional code” instruction is listed for R55.

Excludes1

Conditions that should not be reported together with this code.

  • 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-)

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for R55.

Source and release

Data release
U.S. ICD-10-CM · FY 2027
Effective date
Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Frequently asked questions

What does ICD-10-CM code R55 mean?

R55 is the FY 2027 U.S. ICD-10-CM code for “Syncope and collapse.”

Is R55 a billable or specific ICD-10-CM code?

Yes. In the FY 2027 reference data used on this page, R55 has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.

Where is R55 located in ICD-10-CM?

R55 is listed in Chapter 18, Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), within General symptoms and signs (R50-R69) (R50–R69), under category R55, Syncope and collapse.

What coding notes are listed for R55?

Its listed inclusion terms are Blackout; Fainting; Vasovagal attack. No code-first instruction is listed. Excludes1 notes: 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-). No Excludes2 note is listed.