Logo of nihpaAbout Author manuscriptsSubmit a manuscriptHHS Public Access; Author Manuscript; Accepted for publication in peer reviewed journal;
PMC full text:
Spine J. Author manuscript; available in PMC 2014 Aug 12.
Published in final edited form as:
Spine J. 2013 Nov; 13(11): 1449–1454.
Published online 2013 Jun 15. doi:  10.1016/j.spinee.2013.05.012


Study sample size and estimated total number of chiropractic users, services, charges, and payments from 2002 to 2008

Utilization or costYear
 Medicare Part B beneficiaries (millions)
 Chiropractic users (thousands)326.2337.8353.5364.3360.6351.9344.2
Total national estimates (millions)
 Chiropractic users1.
 Allowed chiropractic services15.316.417.719.119.218.918.6
 Allowed charges (2008$)618.4646.8690.4725.3697.9608.1571.7
 Payments (2008$)456.6479.3513.9539.8514.2447.5420.0
*Study sample based on 20% of all US Medicare Part B beneficiaries.
Chiropractic users among the 20% sample of Medicare Part B beneficiaries.
National estimates generated by multiplying study sample by a factor of 5.