ICD-10-CM 2027
ICD-10 code for Underfeeding
From the official ICD-10-CM alphabetic index entry “Underfeeding, newborn”. Page updated September 29, 2026.
About coding Underfeeding
The ICD-10-CM code for Underfeeding is P92.3 (Underfeeding of newborn).
Within P92 (feeding problems of newborn), P92.3 is specifically for Underfeeding of newborn. Related codes cover vomiting of newborn (P92.0), Regurgitation and rumination of newborn (P92.1), slow feeding of newborn (P92.2), Overfeeding of newborn (P92.4), neonatal difficulty in feeding at breast (P92.5), failure to thrive in newborn (P92.6), other feeding problems of newborn (P92.8) and feeding problem of newborn, unspecified (P92.9).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 795 (Normal Newborn, relative weight 0.2022), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Underfeeding ICD-10 codes
What is the ICD-10 code for Underfeeding?
- P92.3 — Underfeeding of newborn.
Is P92.3 billable?
- Yes. P92.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can P92.3 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict P92.3 as a principal diagnosis.
Is P92.3 a CC or MCC?
- No. P92.3 is neither a CC nor an MCC under MS-DRG v44.0.