HCPCS code J1644: Injection of Heparin sodium, per 1000 units

J1644 is a general code for Heparin Sodium. J1643 is a specific code for Heparin Sodium (Pfizer) that is not therapeutically equivalent to the drug described by J1644. It is essential to use the correct code based on the specific drug administered.

No, a separate code, J1642, is typically used for a heparin lock flush. J1644 is for therapeutic injections of heparin to treat or prevent blood clots, not for flushing a port or line to maintain patency.

The billing unit for J1644 is 1,000 units. Therefore, you should round up to the nearest whole number to bill for the drug. For example, if you administer 1,500 units, you would still bill 2 units of J1644, with one unit being the administered dose and the other unit being the discarded portion.