Table 1.

Indicators of HIV and STI infection

Indicators of HIV infection: ICD-10 code (including more precise multiple digits where applicable)
B20	HIV disease resulting in infectious and parasitic diseases
B21	HIV disease resulting in malignant neoplasms
B22	HIV disease resulting in other specified diseases
B23	HIV disease resulting in other conditions
B24	Unspecified HIV disease
Z21	Asymptomatic HIV infection status
Indicators of HIV infection: German billing codes
30920	Additional fee for the treatment of HIV-infected persons
30922	Surcharge for billing item 30920
32021	HIV infection that requires therapy
32824	HIV ribonucleic acid (RNA) testing
Examined bacterial STI: ICD-10 code (including more precise multiple digits where applicable)
A51	Early syphilis
A52	Late syphilis
A53	Other and unspecified syphilis
A54	Gonococcal infection
A55	Chlamydial lymphogranuloma (venereum)
A56	Other sexually transmitted chlamydial diseases