2027 ICD-10-CM Diagnosis Code P78.9Perinatal digestive system disorder, unspecified
ICD-10-CM Codes›P00–P96›P76-P78›P78
- Billable — Valid for Submission
- Not Chronic
P78.9 is a billable ICD-10-CM diagnosis code for perinatal digestive system disorder, unspecified. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 794. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neonatal digestive and feeding disorders.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute digestive system disorder
- Disorder of digestive organ
- Disorder of digestive system
- Disorder of digestive system specific to fetus OR newborn
- Disorder of digestive tract
- Disorder of gastrointestinal tract
- Disorder of gastrointestinal tract co-occurrent with human immunodeficiency virus infection
- Disorder of lower gastrointestinal tract
- Disorder of upper digestive tract
- Disorder of upper gastrointestinal tract
- Gastrointestinal complication
- Gastrointestinal tract disease treatment started
- Gastrointestinal tract problem
- Gastrointestinal tract treatment changed
- Neonatal gastrointestinal disorder
- Perinatal disorders of liver and/or biliary system
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to P78.9: its own notes plus those printed at P78 and Chapter 16. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- conditions that have their origin in the fetal or perinatal period (before birth through the first 28 days after birth) even if morbidity occurs later
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Notes
General instructions on how these codes are used.
- Codes from this chapter are for use on newborn records only, never on maternal records
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Disorder (of) See Also: Disease;
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Digestive Diseases
When you eat, your body breaks food down to a form it can use to build and nourish cells and provide energy. This process is called digestion.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert P78.9 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About P78.9Overview
What is the ICD-10 code for perinatal digestive system disorder, unspecified?
The ICD-10-CM code for perinatal digestive system disorder, unspecified is P78.9 (sometimes written as P789). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is P78.9 (Other perinatal digestive system disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report perinatal digestive system disorder, unspecified on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does P78.9 group to?
When perinatal digestive system disorder, unspecified is the principal diagnosis on an inpatient stay, it groups to MS-DRG 794 (neonate with Other Significant Problems), which carries a relative weight of 1.4934. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of P78.9?
Under the General Equivalence Mappings, perinatal digestive system disorder, unspecified converts to ICD-9-CM 777.9 (perinat GI sys dis NOS). The mapping is a direct match.
