E85.0 vs K65
E85.0 (Non-neuropathic heredofamilial amyloidosis) compared with K65 (Peritonitis), 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. K65 carries an Excludes1 note covering E85.0: “benign paroxysmal peritonitis (E85.0)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. K65 carries an Excludes1 note covering E85.0: “periodic familial peritonitis (E85.0)”
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
| E85.0Non-neuropathic heredofamilial amyloidosis | K65Peritonitis | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89) | K00-K95 — Diseases of the Digestive System (K00-K95) |
| Definition | Non-neuropathic heredofamilial amyloidosis is a billable ICD-10-CM diagnosis code (E85.0). | Peritonitis is a non-billable ICD-10-CM category code (K65). |
| Includes | Hereditary amyloid nephropathy | — |
| Use additional code | — | code (B95-B97), to identify infectious agent, if known |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources