A patient with diabetes mellitus type 2 is admitted to the hospital for hip replacement surgery. The nurse reviews the following orders:
Diabetic diet with carb counting
Scheduled base dose: Humalog 4 units before meals subcutaneous
Bedside blood glucose testing before meals (ac) and at bedtime (hs) with sliding scale Humalog insulin:
150-175: 2 units
176-200: 4 units
201-225: 6 units
226-250: 8 units
Over 250: call the provider
Metformin 1000 mg twice daily PO
Hypoglycemia protocol: blood glucose 60 or below:
If awake and able to swallow: juice (16 oz)
If unable to swallow Glucagon injection or gel.

The patient's blood glucose level is 223 at breakfast. What amount of insulin will the nurse administer?