I checked with the MO Medicaid Provider unit and received the following response.
As long as the smoking cessation protocol/procedures are documented in your standing orders and signed off on by your medical director, an RN can perform the smoking cessation protocol and covered behavioral interventions. See the Smoking Cessation bulletin for more information. https://dss.mo.gov/mhd/providers/pdf/bulletin38-02_2015jul15.pdf
You will bill, as you usually do, with the billing provider as the County Health Clinic and your medical director as the performing provider.
Please feel free to contact me in Provider Education if you have further questions or if I can be of additional assistance.
Dana Bernier
Constituent Services Unit
Provider Education Representative
Mo HealthNet Division
573-751-6683