Hill has been a mainstay on American television in her work, many of her roles being major recurring roles, the most notable being: Mrs. DePaulo on That's So Raven, Mama Tohru on Jackie Chan Adventures, Mrs. Hasagawa in Lilo & Stitch: The Series (reprising the same character she played in Lilo & Stitch), Ah-Mah Jasmine Lee in The Life and Times of Juniper Lee, Judy Harvey in Enlightened, Mah Mah Ling in American Dad!, Beverly Tarantino in Mom and Ms. Mannering in Preacher.

Hill was a series regular on the Amazon Prime Video show Just Add Magic as Mama P along with recurring in Unreal as Dr. Wagerstein on the basic cable network Lifetime and The CW romantic comedy musical Crazy Ex-Girlfriend as Lourdes Chan.

She guest-starred on Night Court, Six Feet Under, Desperate Housewives, Two and a Half Men, King of the Hill, 3rd Rock from the Sun, The Sarah Silverman Program, and My Wife & Kids.

She had recurring roles on TV shows as well, such as the lesbian daughter of D. L. Hughley's neighbor (played by Pat Morita) on The Hughleys, the upstairs neighbor of Monica and Rachel on Friends, Mrs. DePaulo on That's So Raven, Mama Tohru on Jackie Chan Adventures, Mrs. Hasagawa on Lilo & Stitch: The Series, Penny Candy on The Puzzle Place, Maureen Nervosa, the owner of Cafe Nervosa on Frasier, Mah Mah, the adopted mother of Francine on American Dad!, Dr. Lauren Brown on General Hospital, and Suji on The Naked Truth.

In the sixth-season finale of Seinfeld, she played the part of Frank Costanza's long-lost girlfriend during his Korean War service.