In this pilot, three babies with confirmed DMD who had specimens collected between 24 and 37 h had CK‐MM levels above 6300 ng/mL (referral cutoff ≥4000 ng/mL) and one newborn with confirmed DMD whose specimen was collected at 14 days had a CK‐MM value of 992.7 ng/mL (referral cutoff ≥571 ng/mL). Here, CKM is linked to Duchenne muscular dystrophy.