P92.3 Underfeeding of newborn

Billable ICD-10-CM code, FY2026.

Applies from P92 Feeding problems of newborn

Excludes1 (never code together)

• eating disorders (F50.-)

Excludes2 (not included here)

• feeding problems in child over 28 days old (R63.3-)

MS-DRG index

Defines the logic of DRG(s) 795 in MDC 15.

Approximate ICD-9-CM (GEMs)

• 779.31 Feeding problems in newborn (approximate)

Code annotations containing back-references to P92.3

Back-references to P92

• Type 2 Excludes: E63 Other nutritional deficiencies ("feeding problems in newborn (P92.-)")
• Type 1 Excludes: F50 Eating disorders ("feeding problems of newborn (P92.-)")
• Type 2 Excludes: F98.2 Other feeding disorders of infancy and childhood ("feeding problems of newborn (P92.-)")
• Type 2 Excludes: R63.3 Feeding difficulties ("feeding problems of newborn (P92.-)")

Diagnosis Index entries for P92.3

• Problem (with) (related to) › feeding (elderly) (infant) NOS › newborn › underfeeding
• Underfeeding, newborn

Nearby codes

• P92.0 Vomiting of newborn
• P92.01 Bilious vomiting of newborn
• P92.09 Other vomiting of newborn
• P92.1 Regurgitation and rumination of newborn
• P92.2 Slow feeding of newborn
• P92.3 Underfeeding of newborn (this code)
• P92.4 Overfeeding of newborn
• P92.5 Neonatal difficulty in feeding at breast
• P92.6 Failure to thrive in newborn
• P92.8 Other feeding problems of newborn
• P92.9 Feeding problem of newborn, unspecified