The doctor treating Malorie was Dr. Lapham, played by Parminder Nagra (E.R., The Blacklist, S.H.I.E.L.D.).
Bird Box bookended its story by closing with the return of a supporting character from the beginning.
At the end of the film — five years later — Malorie ran into Dr. Lapham again at the school for the blind that served as a sanctuary for survivors.
When the mysterious creature attacks first started happening, Sandra Bullock’s very pregnant Malorie was just leaving the doctor’s office with her sister Jessica (Sarah Paulson).