Chiro.Org Blog:

Specifically, patients receiving chiropractic care on-site were less likely to have a physical therapy visit (P < 0.0001) and outpatient visit (P < 0.0001). Moreover, the average total numbers of health care visits, radiology procedures, and musculoskeletal medication use per associate with each event were significantly lower for the on-site group (all P < 0.0001). Metz et al [18] assessed health plan members with and without chiropractic coverage and found that patients were directly substituting chiropractic care for medical care when it was available.