A range wide status survey of the perforate reindeer lichen (Cladonia perforata) was performed by revisiting known extant and historical sites and searching for new populations. Size of each population was determined and the extent of invasive plant species in the vicinity of Cladonia perforata was also documented. The data was used to update the global and state NatureServe conservation status rank of this species and provide the current information to the United States Fish and Wildlife Service (USFWS), Department of Defense (DOD), state agencies, and land managers. Twenty-five existing element occurrence records were updated, and seven new element occurrences were documented. Based on several rank factors such as area of occupancy, number of both viable and protected populations, and threats, the rank of Cladonia perforata was recalculated to G2G3/S2S3 from the previous rank of G1/S1 (NatureServe 2022). This change in rank indicates a reduction in conservation status from Critically Imperiled to Imperiled/Vulnerable.