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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.