K31.3 vs R18
K31.3 (Pylorospasm, not elsewhere classified) compared with R18 (Ascites), 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. R18 carries an Excludes2 note covering K31.3: “pylorospasm (K31.3)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| K31.3Pylorospasm, not elsewhere classified | R18Ascites | |
|---|---|---|
| Billing status | Billable | Non-billable header |
| Classification | K00-K95 — Diseases of the Digestive System (K00-K95) | R00-R99 — Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified (R00-R99) |
| Definition | Pylorospasm, not elsewhere classified is a billable ICD-10-CM diagnosis code (K31.3). | Ascites is a non-billable ICD-10-CM category code (R18). |
| Includes | functional disorders of stomach | fluid in peritoneal cavity |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources