R55
Syncope and collapse
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 17 never code together
R55code
Excludes1
- cardiogenic shock (R57.0)R57.0R57.0R57.0
- carotid sinus syncope (G90.01)G90.01G90.01G90.01
- heat syncope (T67.1)T67.1T67.1T67.1
- neurocirculatory asthenia (F45.8)F45.8F45.8F45.8
- neurogenic orthostatic hypotension (G90.3)G90.3G90.3G90.3
- orthostatic hypotension (I95.1)I95.1I95.1I95.1
- postprocedural shock (T81.1-)T81.1-T81.1-T81.1-
- psychogenic syncope (F48.8)F48.8F48.8F48.8
- shock NOS (R57.9)R57.9R57.9R57.9
- shock complicating or following abortion or ectopic or molar pregnancy (O00-O07, O08.3)O00-O07O00-O07O00-O07O08.3O08.3O08.3
- shock complicating or following labor and delivery (O75.1)O75.1O75.1O75.1
- Stokes-Adams attack (I45.9)I45.9I45.9I45.9
- unconsciousness NOS (R40.2-)R40.2-R40.2-R40.2-
R00-R99chapter
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 12
R55code
Inclusion terms
- Blackout
- Fainting
- Vasovagal attack
R00-R99chapter
Notes
- This chapter includes symptoms, signs, abnormal results of clinical or other investigative procedures, and ill-defined conditions regarding which no diagnosis classifiable elsewhere is recorded.
- Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated 'not otherwise specified', 'unknown etiology' or 'transient'. The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.
- The conditions and signs or symptoms included in categories R00-R94 consist of:R00-R94
- (a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;
- (b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;
- (c) provisional diagnosis in a patient who failed to return for further investigation or care;
- (d) cases referred elsewhere for investigation or treatment before the diagnosis was made;
- (e) cases in which a more precise diagnosis was not available for any other reason;
- (f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.
Index entries leading here 17
- Arrhythmia (auricle)(cardiac)(juvenile)(nodal)(reflex)(supraventricular)(transitory)(ventricle) I49.9
- vagal R55
- Attack, attacks
- Drop (in)
- attack NEC R55
- Blackout R55
- Syncope (near) (pre-) R55
- Collapse R55
- general R55
- Loss (of)
- consciousness, transient R55
- Fit R56.9
- fainting R55
- Fainting (fit) R55
- Gower's
- syndrome (vasovagal attack) R55
- Syndrome — see also Disease
- Instability
- vasomotor R55
- Near-syncope R55
- Phenomenon
- Pre-syncope R55
- Reflex R29.2
- vasovagal R55
- Vasovagal attack (paroxysmal) R55
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.