Adele Simmons, MD, DGA was a high-ranking medical doctor serving in Starfleet in the 24th century.

In 2328, Simmons boarded a transport ship at Starbase Allen, bound for Lauritson's Planet. This information was part of a passenger manifest recorded in the commercial transport database and reviewed by Lieutenant Commander Data in 2370. (TNG: "Inheritance")

As a vice admiral, she was listed as Starfleet Tactical personnel on the dedication plaque of the starship USS Brattain in 2345. (TNG: "Night Terrors")

In 2353, Simmons was listed on a directory placard as having an office in room 35951 on Starbase 32. (TNG: "Violations")

On stardate 40250.5, with the title of captain, Simmons was listed as representing Starfleet Academy on the dedication plaque of the USS Phoenix. (TNG: "The Wounded")

By 2365, Dr. Simmons was the commanding officer of a Federation starship. (TNG: "The Measure Of A Man")

Later that year, Dr. Simmons served in the medical section at Starbase 515. Her office there was located in suite 03-1523. (TNG: "Samaritan Snare")

On stardate 44820.5, Captain Simmons was listed as Academy personnel on the dedication plaque of the USS Sutherland. (TNG: "Redemption II")

She was listed as a Starfleet Tactical official on the dedication plaque of the USS Pasteur. (TNG: "All Good Things...")

She was also listed as a Fleet Ops officer on the dedication plaque of the USS Voyager (NCC-74656) (2371) and the USS Prometheus (NX-59650) (2373).

She was also listed on a USS Voyager crew manifest as an ensign, displayed on a computer screen in 2374. (VOY: "The Killing Game" set artwork)