Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 10/9/2025

Preschool Screening for Iron Deficiency Anemia

Screening Strategy

  • The Centers for Disease Control and Prevention recommends screening all children annually from ages 2 to 5 years if they are from low-income families, WIC-eligible, migrant populations, or recently arrived refugees 1, 2, 3
  • Initial screening should have occurred at 9-12 months, with repeat at 15-18 months, before entering the annual preschool screening phase 1, 2
  • Screen only children with documented risk factors, such as low-iron diet, excessive milk intake, poverty, or special healthcare needs, rather than universal screening 1, 2, 3

Diagnostic Approach

  • Repeat hemoglobin or hematocrit to confirm positive screening before initiating treatment 1, 2, 4
  • If both tests agree and the child is not acutely ill, make a presumptive diagnosis of IDA and begin treatment 1, 2

Treatment Protocol

  • Prescribe 3 mg/kg per day of elemental iron administered between meals 1, 2, 4, 5
  • Provide dietary counseling addressing the underlying low iron intake, including limiting milk to maximum 24 oz daily 1, 2, 4, 5

Response Assessment

  • Repeat Hb/Hct after 4 weeks of treatment to assess response 1, 2, 4
  • An increase of ≥1 g/dL in Hb or ≥3% in Hct confirms IDA diagnosis 1, 2, 4, 5

Dietary Counseling

  • Emphasize maximum 24 oz daily of cow's milk, goat's milk, or soy milk 2, 3, 5
  • Recommend iron-fortified cereals, vitamin C-rich foods, and introduction of iron-rich meats and foods 3, 5