In the 23rd century, this planet was invaded by the neural parasites, which been transported to this planet from the civilization on Levinius V. By 2265, the civilization on Ingraham B was destroyed in the mass insanity caused by the parasites. A vessel of infected visitors from Ingraham B carrying the parasites arrived at the Deneva colony in 2266. (TOS: "Operation -- Annihilate!")
In 2293, the location of Ingraham B in the Milky Way Galaxy was labeled in the star chart "The Explored Galaxy", which was on display in Captain James T. Kirk's quarters aboard the USS Enterprise-A. (Star Trek VI: The Undiscovered Country, okudagram)
According to the novel Losing the Peace, after the incident with the neural parasites, Denevan leaders created an emergency plan to evacuate citizens to Ingraham B in the event of a similar worldwide crisis. This plan was put into motion when Deneva was attacked and annihilated by the Borg Collective during their 2381 invasion of the Alpha Quadrant, saving the lives of thousands of Denevans.