I'm going to try to decipher what you've said here. Under the definitions, the 92201 is only to be used for peripheral retinal disease and does require scleral depression and the 92202 is for the optic nerve head and macular areas. The Interpretation and Report for the 99201 should actually mention that scleral depression was done. If it doesn't, then you haven't met the criteria to bill the code. I'll refer to that old record keeping saying I was taught as a student: "If you didn't write it down, you didn't do it."
IMHO, if you are coding the 92201 or 92202 just because you have a patient with BDR or PDR etc, that's incorrect and doesn't qualify for billing extended ophthalmoscopy. Frankly, it sounds like the doctor is just billing that to add to the bill. (Sorry if that sounds harsh, but that's what it sounds like) Noting those things is just part of regular ophthalmoscopy. (I'll refer to my retinal specialist friend who only bills the code 5 times per year)
You also have to look at these codes from another standpoint. Is a simple, often fairly rudimentary, drawing going to provide you with the same level of detail and diagnostic information as a retinal photo or OCT? CMS guidelines say a test should only be done if it will provide you with information to help with the diagnosis and treatment of a patient. With today's technology, extended ophthalmoscopy is becoming less relevant and useful IMHO.