This is a Phase 4, multicenter, randomized, double-blind, placebo-controlled pilot study evaluating the efficacy and safety of Acthar gel in the treatment of pulmonary sarcoidosis. All subjects who meet eligibility criteria will be randomly assigned to receive either 1 mL (80 U) of Acthar or 1 mL of a matching placebo subcutaneously (SC) 2 x/week. Subjects will be assigned to treatment in a 1:1 ratio with up to 50 subjects per arm for a total of up to 100 subjects. Subjects who complete the 24 week randomized, double-blind, placebo-controlled treatment period will be eligible to continue in an optional 24 week open label extension.