The aim of this study was to measure the effects of a managed chiropractic benefit on the rates of specific diagnostic and therapeutic procedures for the treatment of back pain and neck pain. This study is a retrospective analysis of claims data from a managed-care health plan over a 4-year period. The use rates of advanced imaging, surgery, inpatient care, and plain-film radiographs were compared between employer groups with and without a chiropractic benefit. For patients with low back pain, the use rates of all 4 studied procedures were lower in the group with chiropractic coverage. On a per-episode basis, the rates in the group with coverage were reduced by the following: surgery (−32.1%); computed tomography (CT)/magnetic resonance imaging (MRI) (−37.2%); plain-film radiography (−23.1%); and inpatient care (−40.1%). On a per-patient basis, the rates were reduced by the following: surgery (−13.7%); CT/MRI (−20.3%); plain-film radiography (−2.2%); and inpatient care (−24.8%). For patients with neck pain, the use rates were reduced per episode in the group with chiropractic coverage as follows: surgery (−49.4%); CT/MRI (−45.6%); plain-film radiography (−36.0%); and inpatient care (−49.5%). Per patient, the rates were surgery (−31.1%); CT/MRI (−25.7%); plain-film radiography (−12.5%); and inpatient care (31.1%). All group differences were statistically significant. For the treatment of low back and neck pain, the inclusion of a chiropractic benefit resulted in a reduction in the rates of surgery, advanced imaging, inpatient care, and plain-film radiographs. This effect was greater on a per-episode basis than on a per-patient basis.