Psychiatrists who prescribe to patients covered by Medicaid must be registered
Source: Medicaid Information Technology System (MITS)
In case you missed it, beginning in January 2015, Medicaid providers who write orders or referrals or who write prescriptions for medications, must enroll as a provide with the Ohio Medicaid program. Even if you are a prescriber whose name is already included in the psychiatrist prior authorization exemption list maintained by OhioMHAS, you must still be enrolled with Ohio Medicaid either as a billing provider or as an Ordering, Referring or Prescribing (ORP) provider.
Read the Provider Information Release for full details.