// Pseudocode to generate gesamtlieferung_id \$date = date('Ymd'); // Current date in Ymd format \$contract_id = '12002100201'; // Contract identifier \$gesamtlieferung_id = \$date . '_' . \$contract_id; // Pseudocode to generate teilnahme_id_extern \$insurance_number = 'D263860290'; // Example insurance number \$enrollment_date = '20180116'; // Example enrollment date in Ymd format \$teilnahme_id_extern = \$contract_id . '_' . \$insurance_number . '_' . \$enrollment_date; Hamburg – Gesundheit Billstedt/Horn UG