['iron deficiency anemia']
['ferumoxytol', 'fcm']

        Key Inclusion Criteria include:

          -  Participants with IDA and in whom IV iron treatment is indicated and defined as:

               -  Participants with documented hemoglobin <12.0 g per deciliter (dL) for females
                  and <14.0 g/dL for males within 60 days of dosing And

               -  Participants with documented transferrin saturation (TSAT) ≤20% or Ferritin ≤100
                  nanograms (ng) per mL within 60 days of dosing

          -  Documented history of unsatisfactory oral iron therapy or in whom oral iron cannot be
             tolerated, or for whom oral iron is considered medically inappropriate (as per oral
             iron history questionnaire)

          -  All participants (male and female) of childbearing potential who are sexually active
             who agree to routinely use adequate contraception from randomization throughout the
             duration of the study

        Key Exclusion Criteria include:

          -  Known hypersensitivity reaction to any component of ferumoxytol or FCM

          -  History of allergy to an IV iron

          -  History of multiple drug allergies

          -  Participants with dialysis-dependent chronic kidney disease

          -  Hemoglobin ≤7.0 g/dL

          -  Female participants who are pregnant, intend to become pregnant, are breastfeeding,
             have a positive serum/urine pregnancy test or not willing to use effective
             contraceptive precautions during the study (including females of childbearing
             potential who are partners of male participants)
      