2026 ICD-10-CM Diagnosis Code P78.83Newborn esophageal reflux

ICD-10-CM Codes›P00–P96›P76-P78›P78

ICD-10-CM P78.83
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

P78.83 is a billable ICD-10-CM diagnosis code for newborn esophageal reflux. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Neonatal digestive and feeding disorders.

Code Identity

ICD-10-CM Code
P78.83
Billable Status
Yes — Valid for Submission
Code Describes
Newborn esophageal reflux
Short Description
Newborn esophageal reflux
Same as the full description in the CMS dataset.
Parent Code
P78.8
Other specified perinatal digestive system disorders

Code Classification

ChapterP00–P96Certain conditions originating in the perinatal period
SectionP76-P78Digestive system disorders of newborn
CategoryP78Other perinatal digestive system disorders
This CodeP78.83Newborn esophageal reflux

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acid reflux
  • Digestive system reflux
  • Duodenogastric reflux
  • Esophageal reflux finding
  • Esophagogastric ulcer
  • Excessive gastric reflux
  • Finding of esophageal function
  • Gastric reflux
  • Gastroesophageal reflux disease
  • Gastroesophageal reflux disease with apnea
  • Gastro-esophageal reflux disease with ulceration
  • Gastroesophageal reflux disease without esophagitis
  • Gastroesophageal reflux in child
  • Hiatal hernia with gastroesophageal reflux
  • Laryngitis due to gastroesophageal reflux
  • Laryngopharyngeal reflux
  • Minimal gastric reflux
  • Moderate gastric reflux
  • Neonatal gastroesophageal reflux
  • Non-erosive gastro-esophageal reflux disease

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Neonatal esophageal reflux

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Reflux
      • esophageal
        • newborn

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR PNL012
Neonatal digestive and feeding disorders
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Laryngopharyngeal Reflux

    back flow of gastric contents to the laryngopharynx where it comes in contact with tissues of the upper aerodigestive tract. laryngopharyngeal reflux is an extraesophageal manifestation of gastroesophageal reflux.

  • Duodenogastric Reflux

    retrograde flow of duodenal contents (bile acids; pancreatic juice) into the stomach.

Patient EducationClinical

Reflux in Infants

The esophagus is the tube that carries food from your mouth to your stomach. If your baby has reflux, his or her stomach contents come back up into the esophagus. Another name for reflux is gastroesophageal reflux (GER).

The full article covers:

  • What are reflux and GERD?
  • What causes reflux and GERD in infants?
  • How common are reflux and GERD in infants?
  • What are the symptoms of reflux and GERD in infants?
  • How do doctors diagnose reflux and GERD in infants?
  • What feeding changes can help treat my infant's reflux or GERD?
  • What treatments might the doctor give for my infant's GERD?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert P78.83 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
777.8 Perinat GI sys dis NEC
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About P78.83Overview

Is P78.83 (Other specified perinatal digestive system disorders) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report newborn esophageal reflux on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What is the ICD-9 equivalent of P78.83?

Under the General Equivalence Mappings, newborn esophageal reflux converts to ICD-9-CM 777.8 (perinat GI sys dis NEC). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.