2024 ICD-10-CM Diagnosis Code P77.9

Necrotizing enterocolitis in newborn, unspecified

ICD-10-CM Code:
P77.9
ICD-10 Code for:
Necrotizing enterocolitis in newborn, unspecified
Is Billable?
Yes - Valid for Submission
Chronic Condition Indicator: [1]
Not chronic
Code Navigator:

Code Classification

  • Certain conditions originating in the perinatal period
    (P00–P96)
    • Digestive system disorders of newborn
      (P76-P78)
      • Necrotizing enterocolitis of newborn
        (P77)

P77.9 is a billable diagnosis code used to specify a medical diagnosis of necrotizing enterocolitis in newborn, unspecified. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2023 through September 30, 2024.

Unspecified diagnosis codes like P77.9 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Acute radiation enteritis of intestine
  • Colitis
  • Gastroenteritis
  • Necrotizing enterocolitis in fetus OR newborn
  • Neonatal necrotizing enterocolitis
  • Noninfectious enteritis of intestine
  • Noninfectious gastroenteritis
  • Noninfective enteritis and colitis
  • Perinatal necrotizing enterocolitis
  • Radiation enteritis of intestine

Clinical Classification

Clinical Information

  • Gastroenteritis

    inflammation of any segment of the gastrointestinal tract from esophagus to rectum. causes of gastroenteritis are many including genetic, infection, hypersensitivity, drug effects, and cancer.
  • Gastroenteritis, Transmissible, of Swine

    a condition of chronic gastroenteritis in adult pigs and fatal gastroenteritis in piglets caused by a coronavirus.
  • Murine hepatitis virus

    a species of the coronavirus genus causing hepatitis in mice. four strains have been identified as mhv 1, mhv 2, mhv 3, and mhv 4 (also known as mhv-jhm, which is neurotropic and causes disseminated encephalomyelitis with demyelination as well as focal liver necrosis).
  • Transmissible gastroenteritis virus

    a species of coronavirus causing a fatal disease to pigs under 3 weeks old.
  • Colitis

    inflammation of the colon section of the large intestine (intestine, large), usually with symptoms such as diarrhea (often with blood and mucus), abdominal pain, and fever.
  • Colitis, Collagenous

    a subtype of microscopic colitis, characterized by chronic watery diarrhea of unknown origin, a normal colonoscopy but abnormal histopathology on biopsy. microscopic examination of biopsy samples taken from the colon show larger-than-normal band of subepithelial collagen.
  • Colitis, Ischemic

    inflammation of the colon due to colonic ischemia resulting from alterations in systemic circulation or local vasculature.
  • Colitis, Lymphocytic

    a subtype of microscopic colitis, characterized by chronic watery diarrhea of unknown origin, a normal colonoscopy but abnormal histopathology on biopsy. microscopic examination of biopsy samples taken from the colon show infiltration of lymphocytes in the superficial epithelium and the underlying connective tissue (lamina propria).
  • Colitis, Microscopic

    a condition characterized by chronic watery diarrhea of unknown origin, a normal colonoscopy but abnormal histopathology on biopsy. this syndrome was first described in 1980 by read and associates. subtypes include collagenous colitis and lymphocytic colitis. both have similar clinical symptoms and are distinguishable only by histology.
  • Colitis, Ulcerative

    inflammation of the colon that is predominantly confined to the mucosa. its major symptoms include diarrhea, rectal bleeding, the passage of mucus, and abdominal pain.
  • Colitis-Associated Neoplasms

    colonic neoplasms associated with chronic inflammation conditions such as ulcerative colitis and crohn disease.
  • Crohn Disease

    a chronic transmural inflammation that may involve any part of the digestive tract from mouth to anus, mostly found in the ileum, the cecum, and the colon. in crohn disease, the inflammation, extending through the intestinal wall from the mucosa to the serosa, is characteristically asymmetric and segmental. epithelioid granulomas may be seen in some patients.
  • Cytomegalovirus Infections

    infection with cytomegalovirus, characterized by enlarged cells bearing intranuclear inclusions. infection may be in almost any organ, but the salivary glands are the most common site in children, as are the lungs in adults.
  • Dysentery, Amebic

    dysentery caused by intestinal amebic infection, chiefly with entamoeba histolytica. this condition may be associated with amebic infection of the liver and other distant sites.
  • Enterocolitis, Pseudomembranous

    an acute inflammation of the intestinal mucosa that is characterized by the presence of pseudomembranes or plaques in the small intestine (pseudomembranous enteritis) and the large intestine (pseudomembranous colitis). it is commonly associated with antibiotic therapy and clostridium difficile colonization.
  • Irritable Bowel Syndrome

    a disorder with chronic or recurrent colonic symptoms without a clearcut etiology. this condition is characterized by chronic or recurrent abdominal pain, bloating, mucus in feces, and an erratic disturbance of defecation.
  • Coronavirus

    a member of coronaviridae which causes respiratory or gastrointestinal disease in a variety of vertebrates.
  • Cytomegalovirus

    a genus of the family herpesviridae, subfamily betaherpesvirinae, infecting the salivary glands, liver, spleen, lungs, eyes, and other organs, in which they produce characteristically enlarged cells with intranuclear inclusions. infection with cytomegalovirus is also seen as an opportunistic infection in aids.

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Necrotizing enterocolitis in newborn, NOS

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

Convert P77.9 to ICD-9-CM

  • ICD-9-CM Code: 777.50 - Nec enterocoltis NB NOS

Patient Education


Premature Babies

Almost 1 of every 10 infants born in the United States are premature, or preemies. A premature birth is when a baby is born before 37 completed weeks of pregnancy. A full-term pregnancy is 40 weeks.

Important growth and development happen throughout pregnancy - especially in the final months and weeks. Because they are born too early, preemies weigh much less than full-term babies. They may have health problems because their organs did not have enough time to develop. Problems that a baby born too early may have include:

  • Breathing problems
  • Feeding difficulties
  • Cerebral palsy
  • Developmental delay
  • Vision problems
  • Hearing problems

Preemies need special medical care in a neonatal intensive care unit, or NICU. They stay there until their organ systems can work on their own.

Centers for Disease Control and Prevention


[Learn More in MedlinePlus]

Small Intestine Disorders

Your small intestine is the longest part of your digestive system - about twenty feet long! It connects your stomach to your large intestine (or colon) and folds many times to fit inside your abdomen. Your small intestine does most of the digesting of the foods you eat. It has three areas called the duodenum, the ileum, and the jejunum.

Problems with the small intestine can include:

  • Bleeding
  • Celiac disease
  • Crohn's disease
  • Infections
  • Intestinal cancer
  • Intestinal obstruction
  • Irritable bowel syndrome
  • Ulcers, such as peptic ulcer

Treatment of disorders of the small intestine depends on the cause.


[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.

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.