E87 vs O08.5
E87 (Other disorders of fluid, electrolyte and acid-base balance) compared with O08.5 (Metabolic disorders following an ectopic and molar pregnancy), 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. E87 carries an Excludes1 note covering O08.5: “electrolyte imbalance following ectopic or molar pregnancy (O08.5)”
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
| E87Other disorders of fluid, electrolyte and acid-base balance | O08.5Metabolic disorders following an ectopic and molar pregnancy | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89) | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) |
| Definition | Other disorders of fluid, electrolyte and acid-base balance is a non-billable ICD-10-CM category code (E87). | Metabolic disorders following an ectopic and molar pregnancy is a billable ICD-10-CM diagnosis code (O08.5). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources