While money can be pooled, codes (cards) cannot be shared under any circumstances; the patient's own code (card) must be used for medical treatment and drug purchases.
The "family pooling" policy pools money in the employee's personal medical insurance account, not the code (card) itself. The principle of medical insurance is "enrollment by the individual, benefits for the individual".
After family pooling, this principle remains unchanged. The insured still uses their own medical insurance for medical treatment and receives benefits in accordance with the regulations.