R29.2 vs R55
R29.2 (Abnormal reflex) compared with R55 (Syncope and collapse), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. R29.2 carries an Excludes2 note covering R55: “vasovagal reaction or syncope (R55)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| R29.2Abnormal reflex | R55Syncope and collapse | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) |
| Definition | Abnormal reflex is a billable ICD-10-CM diagnosis code (R29.2). | Syncope and collapse is a billable ICD-10-CM diagnosis code (R55). |
| Includes | — | Blackout Fainting Vasovagal attack |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources