K59 vs R19.4
K59 (Other functional intestinal disorders) compared with R19.4 (Change in bowel habit), 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. K59 carries an Excludes1 note covering R19.4: “change in bowel habit NOS (R19.4)”
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
| K59Other functional intestinal disorders | R19.4Change in bowel habit | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| 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 | Other functional intestinal disorders is a non-billable ICD-10-CM category code (K59). | Change in bowel habit is a billable ICD-10-CM diagnosis code (R19.4). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources