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. M00 Pyogenic arthritis

    Excludes2

    • infection and inflammatory reaction due to internal joint prosthesis (T84.5-)
    1. M00.0 Staphylococcal arthritis and polyarthritis

      1. M00.00 Staphylococcal arthritis, unspecified joint

      2. M00.01 Staphylococcal arthritis, shoulder

        • M00.011 Staphylococcal arthritis, right shoulder
        • M00.012 Staphylococcal arthritis, left shoulder
        • M00.019 Staphylococcal arthritis, unspecified shoulder
      3. M00.02 Staphylococcal arthritis, elbow

        • M00.021 Staphylococcal arthritis, right elbow
        • M00.022 Staphylococcal arthritis, left elbow
        • M00.029 Staphylococcal arthritis, unspecified elbow
      4. M00.03 Staphylococcal arthritis, wrist

        Inclusion term(s):

        • Staphylococcal arthritis of carpal bones
        • M00.031 Staphylococcal arthritis, right wrist
        • M00.032 Staphylococcal arthritis, left wrist
        • M00.039 Staphylococcal arthritis, unspecified wrist
      5. M00.04 Staphylococcal arthritis, hand

        Inclusion term(s):

        • Staphylococcal arthritis of metacarpus and phalanges
        • M00.041 Staphylococcal arthritis, right hand
        • M00.042 Staphylococcal arthritis, left hand
        • M00.049 Staphylococcal arthritis, unspecified hand
      6. M00.05 Staphylococcal arthritis, hip

        • M00.051 Staphylococcal arthritis, right hip
        • M00.052 Staphylococcal arthritis, left hip
        • M00.059 Staphylococcal arthritis, unspecified hip
      7. M00.06 Staphylococcal arthritis, knee

        • M00.061 Staphylococcal arthritis, right knee
        • M00.062 Staphylococcal arthritis, left knee
        • M00.069 Staphylococcal arthritis, unspecified knee
      8. M00.07 Staphylococcal arthritis, ankle and foot

        Inclusion term(s):

        • Staphylococcal arthritis, tarsus, metatarsus and phalanges
        • M00.071 Staphylococcal arthritis, right ankle and foot
        • M00.072 Staphylococcal arthritis, left ankle and foot
        • M00.079 Staphylococcal arthritis, unspecified ankle and foot
      9. M00.08 Staphylococcal arthritis, vertebrae

      10. M00.09 Staphylococcal polyarthritis

    2. M00.1 Pneumococcal arthritis and polyarthritis

      1. M00.10 Pneumococcal arthritis, unspecified joint

      2. M00.11 Pneumococcal arthritis, shoulder

        • M00.111 Pneumococcal arthritis, right shoulder
        • M00.112 Pneumococcal arthritis, left shoulder
        • M00.119 Pneumococcal arthritis, unspecified shoulder
      3. M00.12 Pneumococcal arthritis, elbow

        • M00.121 Pneumococcal arthritis, right elbow
        • M00.122 Pneumococcal arthritis, left elbow
        • M00.129 Pneumococcal arthritis, unspecified elbow
      4. M00.13 Pneumococcal arthritis, wrist

        Inclusion term(s):

        • Pneumococcal arthritis of carpal bones
        • M00.131 Pneumococcal arthritis, right wrist
        • M00.132 Pneumococcal arthritis, left wrist
        • M00.139 Pneumococcal arthritis, unspecified wrist
      5. M00.14 Pneumococcal arthritis, hand

        Inclusion term(s):

        • Pneumococcal arthritis of metacarpus and phalanges
        • M00.141 Pneumococcal arthritis, right hand
        • M00.142 Pneumococcal arthritis, left hand
        • M00.149 Pneumococcal arthritis, unspecified hand
      6. M00.15 Pneumococcal arthritis, hip

        • M00.151 Pneumococcal arthritis, right hip
        • M00.152 Pneumococcal arthritis, left hip
        • M00.159 Pneumococcal arthritis, unspecified hip
      7. M00.16 Pneumococcal arthritis, knee

        • M00.161 Pneumococcal arthritis, right knee
        • M00.162 Pneumococcal arthritis, left knee
        • M00.169 Pneumococcal arthritis, unspecified knee
      8. M00.17 Pneumococcal arthritis, ankle and foot

        Inclusion term(s):

        • Pneumococcal arthritis, tarsus, metatarsus and phalanges
        • M00.171 Pneumococcal arthritis, right ankle and foot
        • M00.172 Pneumococcal arthritis, left ankle and foot
        • M00.179 Pneumococcal arthritis, unspecified ankle and foot
      9. M00.18 Pneumococcal arthritis, vertebrae

      10. M00.19 Pneumococcal polyarthritis

    3. M00.2 Other streptococcal arthritis and polyarthritis

      1. M00.20 Other streptococcal arthritis, unspecified joint

      2. M00.21 Other streptococcal arthritis, shoulder

        • M00.211 Other streptococcal arthritis, right shoulder
        • M00.212 Other streptococcal arthritis, left shoulder
        • M00.219 Other streptococcal arthritis, unspecified shoulder
      3. M00.22 Other streptococcal arthritis, elbow

        • M00.221 Other streptococcal arthritis, right elbow
        • M00.222 Other streptococcal arthritis, left elbow
        • M00.229 Other streptococcal arthritis, unspecified elbow
      4. M00.23 Other streptococcal arthritis, wrist

        Inclusion term(s):

        • Other streptococcal arthritis of carpal bones
        • M00.231 Other streptococcal arthritis, right wrist
        • M00.232 Other streptococcal arthritis, left wrist
        • M00.239 Other streptococcal arthritis, unspecified wrist
      5. M00.24 Other streptococcal arthritis, hand

        Inclusion term(s):

        • Other streptococcal arthritis metacarpus and phalanges
        • M00.241 Other streptococcal arthritis, right hand
        • M00.242 Other streptococcal arthritis, left hand
        • M00.249 Other streptococcal arthritis, unspecified hand
      6. M00.25 Other streptococcal arthritis, hip

        • M00.251 Other streptococcal arthritis, right hip
        • M00.252 Other streptococcal arthritis, left hip
        • M00.259 Other streptococcal arthritis, unspecified hip
      7. M00.26 Other streptococcal arthritis, knee

        • M00.261 Other streptococcal arthritis, right knee
        • M00.262 Other streptococcal arthritis, left knee
        • M00.269 Other streptococcal arthritis, unspecified knee
      8. M00.27 Other streptococcal arthritis, ankle and foot

        Inclusion term(s):

        • Other streptococcal arthritis, tarsus, metatarsus and phalanges
        • M00.271 Other streptococcal arthritis, right ankle and foot
        • M00.272 Other streptococcal arthritis, left ankle and foot
        • M00.279 Other streptococcal arthritis, unspecified ankle and foot
      9. M00.28 Other streptococcal arthritis, vertebrae

      10. M00.29 Other streptococcal polyarthritis

    4. M00.8 Arthritis and polyarthritis due to other bacteria

      1. M00.80 Arthritis due to other bacteria, unspecified joint

      2. M00.81 Arthritis due to other bacteria, shoulder

        • M00.811 Arthritis due to other bacteria, right shoulder
        • M00.812 Arthritis due to other bacteria, left shoulder
        • M00.819 Arthritis due to other bacteria, unspecified shoulder
      3. M00.82 Arthritis due to other bacteria, elbow

        • M00.821 Arthritis due to other bacteria, right elbow
        • M00.822 Arthritis due to other bacteria, left elbow
        • M00.829 Arthritis due to other bacteria, unspecified elbow
      4. M00.83 Arthritis due to other bacteria, wrist

        Inclusion term(s):

        • Arthritis due to other bacteria, carpal bones
        • M00.831 Arthritis due to other bacteria, right wrist
        • M00.832 Arthritis due to other bacteria, left wrist
        • M00.839 Arthritis due to other bacteria, unspecified wrist
      5. M00.84 Arthritis due to other bacteria, hand

        Inclusion term(s):

        • Arthritis due to other bacteria, metacarpus and phalanges
        • M00.841 Arthritis due to other bacteria, right hand
        • M00.842 Arthritis due to other bacteria, left hand
        • M00.849 Arthritis due to other bacteria, unspecified hand
      6. M00.85 Arthritis due to other bacteria, hip

        • M00.851 Arthritis due to other bacteria, right hip
        • M00.852 Arthritis due to other bacteria, left hip
        • M00.859 Arthritis due to other bacteria, unspecified hip
      7. M00.86 Arthritis due to other bacteria, knee

        • M00.861 Arthritis due to other bacteria, right knee
        • M00.862 Arthritis due to other bacteria, left knee
        • M00.869 Arthritis due to other bacteria, unspecified knee
      8. M00.87 Arthritis due to other bacteria, ankle and foot

        Inclusion term(s):

        • Arthritis due to other bacteria, tarsus, metatarsus, and phalanges
        • M00.871 Arthritis due to other bacteria, right ankle and foot
        • M00.872 Arthritis due to other bacteria, left ankle and foot
        • M00.879 Arthritis due to other bacteria, unspecified ankle and foot
      9. M00.88 Arthritis due to other bacteria, vertebrae

      10. M00.89 Polyarthritis due to other bacteria

    5. M00.9 Pyogenic arthritis, unspecified

      Inclusion term(s):

      • Infective arthritis NOS
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.