Acupuncture is effective for the treatment of chronic pain and is therefore a reasonable referral option.
Significant differences between true and sham acupuncture indicate that acupuncture is more than a placebo.
For further details:
Vickers, A. J., Cronin, A. M., Maschino, A. C., Lewith, G., MacPherson, H., Foster, N. E., … & Acupuncture Trialists’ Collaboration, F. T. (2012). Acupuncture for chronic pain: individual patient data meta-analysis. Archives of internal medicine, 172(19), 1444-1453.