K52.9 vs P78.3
K52.9 (Noninfective gastroenteritis and colitis, unspecified) compared with P78.3 (Noninfective neonatal diarrhea), 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. K52.9 carries an Excludes1 note covering P78.3: “neonatal diarrhea (noninfective) (P78.3)”
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
| K52.9Noninfective gastroenteritis and colitis, unspecified | P78.3Noninfective neonatal diarrhea | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | K00-K95 — Diseases of the Digestive System (K00-K95) | P00-P96 — Certain Conditions Originating in the Perinatal Period (P00-P96) |
| Definition | Noninfective gastroenteritis and colitis, unspecified is a billable ICD-10-CM diagnosis code (K52.9). | Noninfective neonatal diarrhea is a billable ICD-10-CM diagnosis code (P78.3). |
| Includes | noninfective inflammatory bowel disease Colitis NOS Enteritis NOS Gastroenteritis NOS | Neonatal diarrhea NOS |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources