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Table 1 Percentage Distribution of the Six Most Frequent Primary ICD9-CM Codes for CPT Code A2000 (Manual Manipulation of the Spine to Correct a Subluxation), by Calendar Year.

From: The use of chiropractors by older adults in the United States

ICD9-CM Code Description 1992 1993 1994 1995 1996
839 Other, multiple, and ill-defined dislocations 33.9 39.2 41.5 45.5 38.1
739 Nonallopathic lesions, not elsewhere classified 21.3 26.1 20.0 19.6 34.7
724 Other and unspecified disorders of back 16.0 13.1 15.3 10.4 11.9
723 Other disorders of cervical region 10.8 6.6 5.9 12.1 2.2 b
847 Sprains and strains of other and unspecified parts of back 5.6 4.3 3.1 5.3 3.3
722 Intervertebral disc disorders 4.7 3.4 a 5.6 1.5 3.1
     Cumulative Percentage 92.2 92.7 91.3 94.3 93.2
  1. aCode 729 was slightly more frequent (3.5%).
  2. bCode 729 was slightly more frequent (3.1%), as was code 721 (2.3%).
  3. Cells with bold-faced entries indicate divergence from the 1992 frequency pattern.