I know my doctor should have done a cortisol test long ago. However when I pressed him, he said it wasn't necessary, and he didn't do this test. He's an endocrinologist. He also didn't want to prescribe anything for dizziness that I was having. He did the ACTH test to make sure my adrenals were actually working, and then said no more testing was needed. Unfortunately, he's the only endocrinologist my insurance covers in my current health care plan, and I can only change plans once a year, so I'm stuck with him.