Billing drug testing and 99000 cpt

I work in Mental Health and Substance Abuse services in which our SA patient's require drug testing monitoring. We collect/package the specimen and it is taken to a outside lab. It has been awhile since I billed for laboratory services and I'm wondering do we bill insurance for the UA or does the laboratory bill for it? The director is now saying that since we don't perform the test result in our office we can not bill for it only the 99000 handling fee. However the laboratory we utilize which is a very small practice does not bill it either and he bills us directly for his services. Can someone help me?

re: Billing drug testing and 99000 cpt

This depends on payer, you should look at modifier 90 on the lab test (private payers): Modifier 90 indicates that a laboratory service was performed by an outside laboratory or by a party other than the treating or reporting physician. The physician is billing but test was performed by outside lab who is not billing.
Cannot do this for Medicare patients, only the lab that performs the test can bill for it. Medicare bundles 99000 so not separately billed for or to Medicare patients.