Friedes was cycling in Center City when an alleged drunk driver struck and killed her at 18th and Spruce streets on July 17.
Her family placed what they called an 'angel bike,' painted white with flowers, near where she lost her life.
A plaque at the memorial says Friedes was a "kind and compassionate soul."
Friedes, 30, who was originally from Colorado, treated pediatric cancer patients as an oncology resident at CHOP.
The man accused of hitting Friedes, 68-year-old Michael Vahey, had a blood alcohol concentration that was double the legal limit, investigators say.
READ MORE: 'Going to make a change': Family of CHOP oncology resident killed in crash push for bike safety