O00 vs R55
O00 (Ectopic pregnancy) compared with R55 (Syncope and collapse), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. R55 carries an Excludes1 note covering O00: “shock complicating or following abortion or ectopic or molar pregnancy (O00-O07, O08.3)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| O00Ectopic pregnancy | R55Syncope and collapse | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) |
| Definition | Ectopic pregnancy is a non-billable ICD-10-CM category code (O00). | Syncope and collapse is a billable ICD-10-CM diagnosis code (R55). |
| Includes | ruptured ectopic pregnancy | Blackout Fainting Vasovagal attack |
| Use additional code | code from category O08 to identify any associated complication | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources