2027 ICD-10-CM Diagnosis Code P78.3Noninfective neonatal diarrhea
ICD-10-CM Codes›P00–P96›P76-P78›P78
- Billable — Valid for Submission
- Not Chronic
P78.3 is a billable ICD-10-CM diagnosis code for noninfective neonatal diarrhea. 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 diarrhea
- Congenital secretory diarrhea
- Diarrhea
- Diarrhea and vomiting
- Diarrhea symptom
- Diarrheal disorder
- Digestive symptom
- Hemorrhagic diarrhea
- Hypokalemic alkalosis
- Hypokalemic alkalosis due to diarrhea
- Infantile erythroderma, failure to thrive and diarrhea syndrome
- Inflammatory diarrhea
- Neonatal diarrhea
- Non-infective diarrhea
- Non-infective neonatal diarrhea
- Protracted diarrhea
- Secretory diarrhea
- Severe diarrhea
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to P78.3: 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
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Neonatal diarrhea NOS
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.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name P78.3, its category, or a range that includes it.
Excludes1 2
These codes carry an Excludes1 note naming P78.3: they are not reported together with it, unless the two conditions are unrelated.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Diarrhea
Diarrhea is loose, watery stools (bowel movements). You have diarrhea if you have loose stools three or more times in one day. Acute diarrhea is diarrhea that lasts a short time. It is a common problem. It usually lasts about one or two days, but it may last longer. Then it goes away on its own.
The full article covers:
- What is diarrhea?
- What causes diarrhea?
- Who is at risk for diarrhea?
- What other symptoms might I have with diarrhea?
- When do I need to see a health care provider for diarrhea?
- How is the cause of diarrhea diagnosed?
- What are the treatments for diarrhea?
- Can diarrhea be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert P78.3 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About P78.3Overview
What is the ICD-10 code for noninfective neonatal diarrhea?
The ICD-10-CM code for noninfective neonatal diarrhea is P78.3 (sometimes written as P783). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is P78.3 (Other perinatal digestive system disorders) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report noninfective neonatal diarrhea on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does P78.3 group to?
When noninfective neonatal diarrhea 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 P78.3?
Under the General Equivalence Mappings, noninfective neonatal diarrhea converts to ICD-9-CM 777.8 (perinat GI sys dis NEC). The mapping is approximate, so confirm the match fits the documentation.
