I'm having the same issue, but I haven't asked my NHS doctor just yet. I've also been asked to get an ECG. Asked the patient coordinator and she said the clinics local to the hair transplant surgery won't be able to provide the results in time for the next day.
Complete Blood Count (Hemograma completo)
Ferritin (Ferritina)
Blood Glucose (Glicemia)
Ionogram (Ionograma)
Coagulation (Coagulación)
Hepatitis B and C (Hepatitis B y C)
AIDS (HIV 1 / HIV 2) (Sida - VIH 1 / VIH 2)