The TBOTE Rules do not require a referral for OT for non-medical conditions. Based on the definition in the Rules, this would include ADHD. Other examples of non-medical conditions would be cerebral palsy, learning disabilities, autism, and spina bifida. This is not an exhaustive list, and in all cases the presumption is that the child with the disability is otherwise healthy. In each of these cases, the disability is static, not acute or progressive. Many folks take medication to help manage symptoms (antihistamines, decongestants, seizure meds, stimulants for ADHS etc.). It is important to know if the child is taking a medication so precautions can be adhered to, but just the fact that someone takes medication does not require the OT to get a referral.
Examples of medical conditions that would require a referral would be for a student with cancer, rheumatoid arthritis, muscular dystrophy (might not be needed during times of stability, but would be needed during times where the student is clearly degenerating and functional or medical status is changing), or when a CP child has a rhizotomy or gets a baclifen pump. The flu or another virus is not cause for a medical referral, but significant change in medical status or functional condition would be. At some facilities they get a medical referral on an annual basis, but the Rules do not specify a frequency.