Newborn small for gestational age, unspecified weight

This code identifies a newborn infant who is significantly smaller than expected for their gestational age, without specifying the exact birth weight. It indicates intrauterine growth restriction (IUGR) or fetal growth restriction (FGR) that has resulted in a neonate with a birth weight below the 10th percentile for their gestational age, but the specific weight is not documented.

Assign this code when documentation clearly states the newborn is "small for gestational age" (SGA) or "growth restricted," but the specific birth weight percentile or actual weight is not recorded or is unknown. This code is appropriate when the physician has diagnosed SGA without further specifying the weight category (e.g., extremely low, very low, low birth weight).

• Do not use this code if the specific birth weight is documented; instead, use a more specific P05.1- subcategory.
• Always sequence this code as a principal diagnosis for the newborn when it is the primary reason for admission or care.
• Ensure documentation supports the diagnosis of SGA and the lack of a specified weight.