ICD-10-CM > R00-R99 > R50-R69 > R62 > R62.5 R62.5 Other and unspecified lack of expected normal physiological development in childhood Non-Billable/Non-Specific Type 1 Excludes HIV disease resulting in failure to thrive (B20)physical retardation due to malnutrition (E45) Codes R62.50Unspecified lack of expected normal physiological development in childhoodR62.51Failure to thrive (child)R62.52Short stature (child)R62.59Other lack of expected normal physiological development in childhood