pharmacist billing 99211 incident to MD for coumadin clinic

Can you confirm that a pharmacist can bill for comadin clinic services using 99211 incident to the supervising MD?

Can you direct me the Medicare guideline that confirms this? THanks

coumadin clinic

http://www.ashp.org/import/news/HealthSystemPharmacyNews/newsarticle.aspx?id=3100.
Also review this site:

https://www.noridianmedicare.com/provider/updates/docs/incident_to_billing_99211_acro.pdf%3f