P77.2

Billable

Stage 2 necrotizing enterocolitis in newborn

HCC Category Mapping

V28HCC 78 — Intestinal Obstruction/Perforation

0.000

What This Code Means

Moderate stage necrotizing enterocolitis in a newborn with evidence of intestinal tissue damage visible on imaging but without perforation.

Coding Tips

•Stage 2 NEC includes pneumatosis intestinalis (air in bowel wall) and/or portal venous gas; ensure imaging findings are documented
•Monitor for progression to Stage 3; document clinical deterioration and any additional complications

Clinical Significance

Stage 2 NEC indicates progression beyond initial signs with definite radiographic evidence of disease, requiring more intensive monitoring and treatment. This stage represents a critical point where medical management must be optimized to prevent progression to the surgical stage.

Documentation Requirements

✓Radiographic evidence of pneumatosis intestinalis
✓Clinical deterioration from Stage 1 presentation
✓Absence of free air or signs of perforation
✓Metabolic acidosis or other systemic signs
✓Documentation of stage progression timeline
✓Intensive care monitoring parameters
✓Medical management interventions (antibiotics, fluid support)
✓Serial imaging studies showing disease progression

Commonly Confused Codes

P77.1 — Stage 1 necrotizing enterocolitis (lacks pneumatosis intestinalis)P77.3 — Stage 3 necrotizing enterocolitis (has perforation and free air)P77.9 — Necrotizing enterocolitis, unspecified (stage not documented)P78.3 — Other necrotizing enterocolitis (non-staged or atypical presentation)

Code Hierarchy

└P77Necrotizing enterocolitis of newborn └P77.2Stage 2 necrotizing enterocolitis in newborn

└P77.2Stage 2 necrotizing enterocolitis in newborn