P78.1 — Other neonatal peritonitis
Is P78.1 billable?
Yes — P78.1 is billable for FY2027. P78.1 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. P78.1 may be submitted for encounters from October 1, 2026 through September 30, 2027.
P78.1 at a glance
| Code | P78.1 |
|---|---|
| Description | Other neonatal peritonitis |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does P78.1 group to?
P78.1 sits in MDC 15 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 794Neonate with Other Significant Problemsmedical
How is P78.1 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to P78.1. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Peritonitis › congenital (adhesive) (bacterial) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion)
- Peritonitis › neonatal (adhesive) (bacterial) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion)
Inclusion terms
Alternative wording in documentation that is classified to P78.1.
- Neonatal peritonitis NOS
Excludes1 — never code together — inherited from P78
The conditions below can never be reported together with P78.1 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 16
The conditions below are not part of P78.1, but a patient may have both at the same time. When documentation supports it, P78.1 and the excluded code may both be reported.
How long has P78.1 existed?
P78.1 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with P78.1?
ICD-10-CM declares these codes mutually exclusive with P78.1 — exactly one of each pair can be correct for a given encounter.