The network says the 83-year-old Walters is resting comfortably and getting stronger. There is no word yet on when she'll return to work.
Walters went to the hospital after falling and cutting her head at a pre-inaugural party in Washington, D.C. earlier this month.
The ABC News veteran was later diagnosed with chicken pox, which typically hits people when they are children.
The disease can be serious in older people because of the possibility of complications like pneumonia.
The Associated Press contributed to this report.