ICD-10-CM 2027
ICD-10 code for Fainting fit
From the official ICD-10-CM alphabetic index entry “Fit › fainting”. Page updated September 29, 2026.
About coding Fainting fit
The ICD-10-CM code for Fainting fit is R55 (Syncope and collapse).
Don't report R55 together with the conditions in its Excludes1 note: cardiogenic shock (R57.0), carotid sinus syncope (G90.01), heat syncope (T67.1), neurocirculatory asthenia (F45.8) and 9 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 312 (Syncope and Collapse, relative weight 0.866), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Don't confuse with (Excludes1 for R55)
- 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-)
Common questions about Fainting fit ICD-10 codes
What is the ICD-10 code for Fainting fit?
- R55 — Syncope and collapse.
Is R55 billable?
- Yes. R55 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R55 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R55 as a principal diagnosis.
Is R55 a CC or MCC?
- No. R55 is neither a CC nor an MCC under MS-DRG v44.0.