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. Author manuscript; available in PMC: 2010 Aug 2.
Published in final edited form as: Spine (Phila Pa 1976). 2006 Nov 1;31(23):2707–2714. doi: 10.1097/01.brs.0000248132.15231.fe

Map 2. Lumbar Fusion.

Map 2

In 80 hospital referral regions, rates of lumbar fusion were at least 30% higher than the United States average of 1.0 per 1,000 Medicare enrollees. In 98 hospital referral regions, rates were more than 25% lower than the national average.