That’s precisely why you should never be in a specialty where your only income source is from referrals.
The way our system is set up, pretty much everything save for primary care, gas, rads, and path is referral based.
There’s also a bit of nuance here. Referrals are not all created equal. Certain patients are more valuable and lucrative than others, and I mean purely from a medical rather than a financial perspective. This varies for every doc, but for me I would rank them thus:
1) referrals from other ents. As a fellowship trained subspecialist, these are like gold. They’ve been screened and are coming usually with a diagnosis requiring advanced techniques and equipment, or are a diagnostic challenge. Often they need and would also like to have procedures done. You better believe these relationships are cultivated and every ent in my city has my personal number and I take their calls 24/7 and say yes to anything I can manage.
2) referrals from other selected specialists. For me these are usually endocrine surgeons, Pulm, thoracic, neuro. I do a lot of advanced airway work and these too tend to be very involved cases requiring advanced care. These are also relationships I carefully cultivate, and I often send patients the other direction as well.
3) pcp referrals. Lower hit rate than the above, but these too have been screened and typically come with something that at least needs additional workup - usually some kind of in office endoscopy and advanced imaging. At the very least, they’ve been started on and failed basic medical management. These too are very valuable relationships and I keep in close contact with them as well. I get a lot of repeat referrals and a number of my referring docs have even become my patients, so hopefully that means I’m doing something right!
4) self referrals. VERY low hit rate. These are lots of runny noses and sore throats that typically require minimal medical management. I don’t even really see these folks unless they’re staff or somehow otherwise connected to me. I’m booked into next year already, but I could be even busier if I opened my practice to self referrals.
So in some ways the specialties could operate without referring docs, but your hit rate of operative cases would be substantially lower. It’s also pretty miserable seeing patients that don’t really need advanced services and could have been managed perfectly well by a good pcp.