Q We treated an ectopic pregnancy with an injection of potassium chloride transvaginally. How is this coded?
A First, was ultrasound guidance of the needle used—and documented? If so, you can report 76942 (ultrasonic guidance for needle placement [eg, biopsy, aspiration, injection, localization device], imaging, supervision, and interpretation).
CPT does not have a code for the injection itself, and I do not advise the unlisted injection procedure code—that implies an injection in the skin or another easily accessibly location. I recommend 59899 (unlisted procedure, maternity care and delivery). You will need to submit documentation with this claim.