depends on where you are and what type of setting...here there are separate divisions of diabetes and endocrinology...so if you are in the endocrinology division you see everything but diabetes...sure in the inpt setting, there will be diabetes (the majority of those consults are for diabetes), but that amount probably makes up <10% of what those in the endocrinology division see.
really the most common thing is thyroid...those get referred from the PCPs much more than diabetes...and there are people out there that see only thyroid...esp if they are heavy into biopsies.
in private practice, it will be different...with a mix, but even then thyroid and diabetes are probably even, unless you bill yourself as a diabetologist...then of course you can be 100% diabetes.