Low CL as I am not sure of the term that would actually be used in English, though I think that this is the sense. It is referring to payment for a package, bundle or group of services or procedures in contrast to a single service, or at least to a service classified within a specific group of services. See the following links:

9.1: Beispiel Leistungskomplex Check-up-Ergänzung
GOÄ-Nr. Legende
3550 Blutbild/Blutbildbestandteile
http://books.google.co.uk/books?id=-SZYyObxis8C&pg=PA90&lpg=...

1 Leistungskomplex: Durch die Bildung von Leistungskomplexen werden regelmäßig in Kombination erbrachte Einzelleistungen zusammenfassend bewertet.
Als Beispiel ist das Spermiogramm (-»Nr. 3668) aufgeführt. Häufiger vorkommende Leistungskomplexe sind z. B. das Blutbild (-»Nr. 3550) oder die Blutgasanalyse (-»Nr. 3710).
http://books.google.co.uk/books?id=9tTQr3DeK6oC&pg=PA921&lpg...

Leistungskomplex:
Die für die Behandlung des einzelnen Falls notwendigen Leistungen können zu Komplexen zusammengefasst werden – Laborleistungen, Verwaltungsleistungen oder operative Leistungen – und durch eine Pauschale vergütet werden. Leistungskomplexe sind eine Vorstufe von Fallpauschalen.
http://www.fmc.ch/uploads/tx_templavoila/P4P-Studie_Amelung_...

25 Plans to change the reimbursement method of physicians have been introduced by the 1993 Health Care Act. In short, the move is towards reimbursing physicians on the basis of so-called service groups (Leistungskomplexe), rather then on a fee-for-service basis (NERA,
1993:27).
http://www.euro.who.int/__data/assets/pdf_file/0004/119821/E...

Doctors are paid mostly on a fee-for-service basis. According to the Health Structure Act of 1993, the individual codes listed in the EBM are supposed to be bundled into service groups (Leistungskomplexe) and flat rates defined for each group. However, these provisions of the social
code have been implemented only for very few procedures. The EBM is not only a fee schedule, it also defines the services (methods and procedures) that are covered by the social health insurance funds. Procedures that are not listed in the EBM are not subject to general coverage by the SHI funds.
http://www.bvmed.de/linebreak4/mod/netmedia_pdf/data/study-e...