Would you, please, explain the meaning of NEC, not elsewhere classified?
e.g. Dependence on enabling machines and devices, not elsewhere classified.
Acquired absence of organs, not elsewhere classified. etc.
This is technical jargon, and it relates to bureaucratic tabulations. It means "which does not fall into any of the categories in our list."
A common example is the submission of claims for compensation of physicians or reimbursement of patients. There may be numerous reasons why a physician might order a certain test for a patient, and each of those reasons would typically be assigned a code in some official list. An additional NEC code is frequently added to the list to accommodate those rare cases in which the physician's reason for ordering the test fails to fall into any of the common categories.
The term is not limited to medicine. Here is an example from an EU document about how professions are regulated in various EU countries.