This axis contains a list of conditions in other chapters of ICD-10 that are often found in association with the disorders in Chapter V(F) itself. They are provided here so that psychiatrists recording diagnoses by means of the Clinical Descriptions and Diagnostic Guidelines have immediately to hand the ICD terms and codes that cover the associated diagnoses most likely to be encountered in ordinary clinical practice. The majority of the conditions covered are given only at the three-character level, but four-character codes are given for a selection of those diagnoses that are likely to be used most frequently. A dash following a three character code (e.g. A80.–) indicates that the full ICD-10 includes categories at the four character level but that these are not included in this abbreviated list. This dash is not inserted where at least one four character rubric has been included under the respective three digit one, even if not all the four character ones are cited. Those wishing to use the four character code where only three are cited in this list, will need to consult the full ICD-10.

As with the first three axes, a coding of XX should be given when there is no significant medical condition.

Chapter I

Certain infectious and parasitic diseases (A00–B99)

Congenital syphilis

1. A50.0 Early congenital syphilis, symptomatic

2. A50.1 Early congenital syphilis, latent

3. A50.2 Early congenital syphilis, unspecified

4. A50.3 Late congenital syphilitic oculopathy

5. A50.4 Late congenital neurosyphilis [juvenile neurosyphilis]

6. A50.5 Other late congenital syphilis, symptomatic

7. A50.6 Late congenital syphilis, latent

8. A50.7 Late congenital syphilis, unspecified

9. A50.9 Congenital syphilis, unspecified

Acute poliomyelitis

Slow virus infections of central nervous system

1. A81.1 Subacute sclerosing panencephalitis

2. A81.2 Progressive multifocal leukoencephalopathy