Table 3

Variation in the frequency of ICD-9 codes for patients with claims-based recurrent mechanical LBP in 2000 and 2007
Condition ICD-9 Frequency 2000 (n) Frequency 2007 (n) Variation over all diagnoses % Variation by category % (n)
Herniated disc 722.1 1.4% 2.0% +0.6% 11%
722.2 (5 270) (5 825) (555)
722.7
Probably degenerative changes 721.3 18.5% 17.2% −1.3% −18%
721.5-8 (70 162) (57 764) (-12 398)
721.9
722.5
722.6
722.9
Spinal stenosis 721.4 1.9% 3.8% +1.9% 43%
724.0 (7 250) (12 765) (5 515)
Possible instability 724.6 0.2% 0.1% −0.1% −37%
(655) (415) (-240)
Non-specific back aches 724.2 66.9% 65.1% −1.8% −14%
724.5 (254 385) (218 228) (-36 157)
Sequelae of previous back surgery 722.8 0.0% 0.1% +0.1% 2 650%
(8) (212) (204)
Miscellaneous 722.3 11.2% 11.7% +0.5% +8%
724.3-4 (42 422) (39 224) (3 198)
724.8-9
739.3-4

Beaudet et al.

Beaudet et al. BMC Musculoskeletal Disorders 2013 14:151   doi:10.1186/1471-2474-14-151

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