FTT is the inability of an infant or young child to grow appropriately. Many children with FTT also show signs of delays in one or more developmental domains.

FTT is an MDI for children from birth to attainment of age 3, regardless of whether an underlying digestive disorder or other medical condition is present.

FTT is not an MDI for children after the attainment of age 3. After age 3, evaluate growth failure under the affected body system(s).

Establish FTT with or without a known cause when there is documentation of an infant or toddler’s growth failure and developmental delay from an acceptable medical source(s) (AMS) in DI 34005.100, Low Birth Weight and Failure to Thrive, listing section 100.05. Documentation of Growth measurements in listing section 100.05A and developmental delay in 100.05B or 100.05C must be within the same consecutive 12-month period and at least 60 days apart. The dates of developmental testing and reports may be different from the dates of the growth measurements.