This block comprises arthropathies due to microbiological agents. Distinction is made between the following types of etiological relationship:
a) direct infection of joint, where organisms invade synovial tissue and microbial antigen is present in the joint;
b) indirect infection, which may be of two types: a reactive arthropathy, where microbial infection of the body is established but neither organisms nor antigens can be identified in the joint, and a postinfective arthropathy, where microbial antigen is present but recovery of an organism is inconstant and evidence of local multiplication is lacking.

  1. M01 Direct infections of joint in infectious and parasitic diseases classified elsewhere

    Excludes1

    • arthropathy in Lyme disease (A69.23)
    • gonococcal arthritis (A54.42)
    • meningococcal arthritis (A39.83)
    • mumps arthritis (B26.85)
    • postinfective arthropathy (M02.-)
    • postmeningococcal arthritis (A39.84)
    • reactive arthritis (M02.3)
    • rubella arthritis (B06.82)
    • sarcoidosis arthritis (D86.86)
    • typhoid fever arthritis (A01.04)
    • tuberculosis arthritis (A18.01-A18.02)
    1. M01.X Direct infection of joint in infectious and parasitic diseases classified elsewhere

      1. M01.X0 Direct infection of unspecified joint in infectious and parasitic diseases classified elsewhere

      2. M01.X1 Direct infection of shoulder joint in infectious and parasitic diseases classified elsewhere

        • M01.X11 Direct infection of right shoulder in infectious and parasitic diseases classified elsewhere
        • M01.X12 Direct infection of left shoulder in infectious and parasitic diseases classified elsewhere
        • M01.X19 Direct infection of unspecified shoulder in infectious and parasitic diseases classified elsewhere
      3. M01.X2 Direct infection of elbow in infectious and parasitic diseases classified elsewhere

        • M01.X21 Direct infection of right elbow in infectious and parasitic diseases classified elsewhere
        • M01.X22 Direct infection of left elbow in infectious and parasitic diseases classified elsewhere
        • M01.X29 Direct infection of unspecified elbow in infectious and parasitic diseases classified elsewhere
      4. M01.X3 Direct infection of wrist in infectious and parasitic diseases classified elsewhere

        Inclusion term(s):

        • Direct infection of carpal bones in infectious and parasitic diseases classified elsewhere
        • M01.X31 Direct infection of right wrist in infectious and parasitic diseases classified elsewhere
        • M01.X32 Direct infection of left wrist in infectious and parasitic diseases classified elsewhere
        • M01.X39 Direct infection of unspecified wrist in infectious and parasitic diseases classified elsewhere
      5. M01.X4 Direct infection of hand in infectious and parasitic diseases classified elsewhere

        Inclusion term(s):

        • Direct infection of metacarpus and phalanges in infectious and parasitic diseases classified elsewhere
        • M01.X41 Direct infection of right hand in infectious and parasitic diseases classified elsewhere
        • M01.X42 Direct infection of left hand in infectious and parasitic diseases classified elsewhere
        • M01.X49 Direct infection of unspecified hand in infectious and parasitic diseases classified elsewhere
      6. M01.X5 Direct infection of hip in infectious and parasitic diseases classified elsewhere

        • M01.X51 Direct infection of right hip in infectious and parasitic diseases classified elsewhere
        • M01.X52 Direct infection of left hip in infectious and parasitic diseases classified elsewhere
        • M01.X59 Direct infection of unspecified hip in infectious and parasitic diseases classified elsewhere
      7. M01.X6 Direct infection of knee in infectious and parasitic diseases classified elsewhere

        • M01.X61 Direct infection of right knee in infectious and parasitic diseases classified elsewhere
        • M01.X62 Direct infection of left knee in infectious and parasitic diseases classified elsewhere
        • M01.X69 Direct infection of unspecified knee in infectious and parasitic diseases classified elsewhere
      8. M01.X7 Direct infection of ankle and foot in infectious and parasitic diseases classified elsewhere

        Inclusion term(s):

        • Direct infection of tarsus, metatarsus and phalanges in infectious and parasitic diseases classified elsewhere
        • M01.X71 Direct infection of right ankle and foot in infectious and parasitic diseases classified elsewhere
        • M01.X72 Direct infection of left ankle and foot in infectious and parasitic diseases classified elsewhere
        • M01.X79 Direct infection of unspecified ankle and foot in infectious and parasitic diseases classified elsewhere
      9. M01.X8 Direct infection of vertebrae in infectious and parasitic diseases classified elsewhere

      10. M01.X9 Direct infection of multiple joints in infectious and parasitic diseases classified elsewhere

Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.