HCPCS Code J1442: Injection, Filgrastim (G-CSF), Excludes Biosimilars, 1 Microgram

It shouldn't take longer than 10 minutes, and this includes preparation. The whole session might take longer because the patient needs to be observed for adverse reactions.

As with any injection, there will be pain and discomfort in the injection site. It's possible for the patient to have symptoms of a mild fever or flu after. Adverse reactions are rare, but the possible reactions include allergic reactions and splenic rupture.

There should be an increase in the patient's white blood cell count within a few days or a week after taking the shot.