http://pediatrics.aappublications.org/content/114/1/297
“Physiologic jaundice in healthy term newborns follows a typical pattern. The average total serum bilirubin level usually peaks at 5 to 6 mg per dL (86 to 103 μ mol per L) on the third to fourth day of life and then declines over the first week after birth.” AAFP 2002
**The phototherapy chart / curve above (Bhutani curve) covers only the first 7 days.
Great AAFP article
https://www.aafp.org/afp/2002/0215/p599.html