DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

R55 diagnosis code · Billable category · FY2027

R55 Syncope and collapse

  • Billable
  • Not CC/MCC
  • POA reported

R55 ICD-10 code: a billable diagnosis code in FY2027; the category has no subdivisions.

Where it sits

  1. Chapter 18 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
  2. R50-R69 General symptoms and signs (R50-R69)
  3. R55 Syncope and collapse
CC / MCC
Neither
MS-DRG
312
HCC V28
–
POA
Reported
Code Editor
–
Index entries
30

Instructions

At R55

Inclusion terms

  • Blackout
  • Fainting
  • Vasovagal attack

Excludes1

  • cardiogenic shock (R57.0) R57.0
  • carotid sinus syncope (G90.01) G90.01
  • heat syncope (T67.1) T67.1
  • neurocirculatory asthenia (F45.8) F45.8
  • neurogenic orthostatic hypotension (G90.3) G90.3
  • orthostatic hypotension (I95.1) I95.1
  • postprocedural shock (T81.1-) T81.1
  • psychogenic syncope (F48.8) F48.8
  • shock NOS (R57.9) R57.9
  • shock complicating or following abortion or ectopic or molar pregnancy (O00-O07, O08.3) O00 O07 O08.3
  • shock complicating or following labor and delivery (O75.1) O75.1
  • Stokes-Adams attack (I45.9) I45.9
  • unconsciousness NOS (R40.2-) R40.2

Notes that also apply

Chapter 18 instructions (Notes 9, Excludes2 4): printed on the chapter 18 page.

Index entries

  • Blackout → R55
  • Collapse → R55
  • Fainting (fit) → R55
  • Near-syncope → R55
  • Pre-syncope → R55
  • Syncope (near) (pre-) → R55
  • Vasovagal attack (paroxysmal) → R55
  • Arrhythmia (auricle)(cardiac)(juvenile)(nodal)(reflex)(supraventricular)(transitory)(ventricle)vagal → R55
  • Attack, attacksdrop NEC → R55
  • Attack, attackssyncope → R55
  • Attack, attacksunconsciousness → R55
  • Attack, attacksvasomotor → R55
  • Attack, attacksvasovagal (paroxysmal) (idiopathic) → R55
  • Collapsegeneral → R55
  • Drop (in)attack NEC → R55
  • Fitfainting → R55
  • Gower'ssyndrome (vasovagal attack) → R55
  • Instabilityvasomotor → R55
  • Loss (of)consciousness, transient → R55
  • Phenomenonvasomotor → R55
  • Phenomenonvasovagal → R55
  • Reflexvasovagal → R55
  • Syncope (near) (pre-)cardiac → R55
  • Syncope (near) (pre-)heart → R55
  • Syncope (near) (pre-)vasoconstriction → R55
  • Syncope (near) (pre-)vasodepressor → R55
  • Syncope (near) (pre-)vasomotor → R55
  • Syncope (near) (pre-)vasovagal → R55
  • SyndromeGower's → R55
  • Syndromevasovagal → R55

NCHS Alphabetic Index. Index first, then the Tabular List.

Medicare grouping and edits

CMS files for R55
CC / MCCNeither
Appendix BMDC 05 Diseases and Disorders of the Circulatory System, MS-DRG 312 (Syncope and Collapse…)
Code Editor–
POAReported
HCC V28–

CMS: MS-DRG v44 (Appendix B, C), MCE v44, POA list FY2027, 2027 Initial ICD-10-CM Mappings. What the rows mean.

Hierarchy