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    v1.0.28
    OpenPayerBilling CodesDigestive system disorders of newbornICD-10-CM p77-necrotizing-enterocolitis-of-newborn
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    ICD-10-CM Code For Necrotizing Enterocolitis Of Newborn: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group P77 includes necrotizing enterocolitis of the newborn, covering diagnoses of intestinal inflammation, necrosis, and related complications in neonates. These ICD-10-CM diagnosis codes are used to document acute neonatal intestinal injury, disease severity, presence of perforation or necrosis, and associated clinical complexity. Accurate coding within the ICD-10-CM P77 group supports proper claim adjudication and complete clinical documentation.

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    ICD-10-CM P77: Necrotizing Enterocolitis Of Newborn Overview

    The ICD-10-CM P77 group captures necrotizing enterocolitis in neonates, a serious inflammatory and ischemic condition of the intestine most common in preterm infants. These diagnoses target the digestive system of the newborn and reflect varying severity and complications such as intestinal necrosis or perforation. Accurate coding matters for complete clinical documentation and appropriate reimbursement because it communicates disease severity and care complexity to payers.

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    When to Use

    Use a code from this group when a neonate is diagnosed with necrotizing enterocolitis documented by clinical evaluation, imaging, surgical findings, or pathology. Select the specific code that reflects documented severity, presence of necrosis, perforation, or other recorded complications.

    ICD-10-CM Codes

    4 rows

    ICD-10-CM CodeDescription
    P77.1Stage 1 necrotizing enterocolitis in newborn
    P77.2Stage 2 necrotizing enterocolitis in newborn
    P77.3Stage 3 necrotizing enterocolitis in newborn
    P77.9Necrotizing enterocolitis in newborn, unspecified

    DRG Codes

    2 rows

    DRG CodeDescription
    791Prematurity with Major Problems
    793Full Term Neonate with Major Problems

    Typical Clinical Scenarios

    • A preterm neonate (born at 28 weeks gestation) in the NICU develops increasing abdominal distention, bilious gastric residuals, feeding intolerance, apnea episodes, and a rising C-reactive protein on day 10 of life; abdominal radiographs show pneumatosis intestinalis consistent with classic necrotizing enterocolitis, prompting bowel rest, broad-spectrum antibiotics, and close monitoring. Typical codes: P77.1
    • A full-term newborn presents to the emergency department on day 4 of life with sudden onset bloody stools, abdominal tenderness, and systemic instability after an episode of perinatal hypoxia; imaging suggests extensive bowel wall necrosis and the infant requires emergent surgical consultation for suspected intestinal perforation related to severe necrotizing enterocolitis. Typical codes: P77.2, P77.3
    • A neonate recovering from NEC who had prior medical management now has chronic feeding difficulties, short bowel physiology after resection, and ongoing dependence on parenteral nutrition with complications such as failure to thrive and cholestasis; the encounter is for follow-up and management of sequelae of prior necrotizing intestinal disease. Typical codes: P77.9

    Related Codes

    P76-OTHER-INTESTINAL-OBSTRUCTION-OF-NEWBORN

    ICD-10-CM Code For Other Intestinal Obstruction Of Newborn: Group Overview

    P78-OTHER-PERINATAL-DIGESTIVE-DISORDERS

    ICD-10-CM Code For Other Perinatal Digestive System Disorders: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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