I routinely order narcs (duh).
I'll do anti-depressants for palliative patients who likely have less than a year or two (Wellbutrin is my go-to, I'll consider Ritalin if the prognosis is less than 6 months but if I feel a patient is more appropriate for Ritalin than Wellbutrin I'm sending them to Palliative Care/Hospice anyway).
Referrals for lymphedema, speech path, "regular" PT, pelvic floor therapy, wound care, HBO. Looking for a local acupuncture place but have been coming up empty. I write for various nutritional supplements (whatever my RD puts on my desk).
Advanced care planning, handicapped placards. PEG tubes like
@medgator said. Definitely hospice referrals.
DME is tricky. Wigs - yes. Various other things requested by PT as needed. Haven't written for home O2 since I was an intern but I would if asked. Home health...I haven't personally done that in my current job. If things are going down the home health road, I loop in my social worker and she makes things happen. It's very rare that a patient comes to me needing home health and hasn't already been intercepted by MedOnc/PCP and had it started. Regarding my random social work requests - sometimes I need to sign things, often I do not. I've asked her to get our patients everything from support groups to temporary housing to alcohol addiction counseling/rehab.
I'm sure I'm forgetting things but - I view my role as a short-term PCP. It's one of the things I liked about RadOnc. Very few other doctors have patients coming to their office on an outpatient basis daily, for weeks at a time. I'm also in a community setting where many of the medical practices are affiliated but not under one large, consolidated system. It's not ideal under the best of times, and right now is not the best of times. I've watched A LOT of care get delayed or forgotten, patients hanging out in the wind, things not happening "like normal". So I tell the patients (and my staff) that even if we can't make something happen, we can at least grease the wheels, and help make sure "the system" doesn't let someone down.
If that means I'm ordering lower extremity dopplers every now and again...so be it.