GELSYN-3 has a dedicated J code:
J7328 GELSYN-3 injection 0.1 mg (HCPCS)

Providers should bill 168 units of HCPCS code J7328 for the
single injection of GELSYN-3, as J7328 reimburses per 0.1mg.

Click here for $50 Patient Coupon.