Welcome to the PEB Forum!
As based
only upon the information provided in your above thread in reference to using the DoVA Combined Ratings Table, disability ratings are not additive. As such, if a Veteran has one disability rated 60% and a second disability 20%, the combined rating is not 80%. In accordance with 38 CFR §4.25 VASRD, it states "Table I, Combined Ratings Table, results from the consideration of the efficiency of the individual as affected first by the most disabling condition, then by the less disabling condition, then by other less disabling conditions, if any, in the order of severity."
First, I would suggest re-calculating all of your VA disability ratings from highest to lowest using the
DoVA Combined Ratings Table at 38 CFR §4.25 VASRD to actually validate your assumption. Basically, a 90% rating combined with a 30% rating yields a 93% rating. But, the total combined rating or the final degree of disability (as referenced in §4.25) will be rounded down to 90% since it must be converted to the nearest degree divisible by 10. So, using the DoVA Combined Ratings Table would seem to match your total combined rating of 90% at this particular point in time.
Secondly, a mental illness can often result from a military service-connected
physical condition. As such, anxiety is often secondary to physical pain; therefore, it can be linked to your physical condition(s). Moreover, veterans often develop secondary mental conditions as a result of a physical disability caused on military active duty. If you have a service-connected physical disability that resulted in depression or some other mental ailment, you are entitled to an additional disability rating for your mental illness. This is called "secondary service connection" because your second condition, the mental illness, was caused by your primary physical disability, for which you were awarded DoVA compensation.
Hmm, is this applicable in your own specific medical situation? Was your Anxiety Disorder NOS (claimed as sleeping problems and loss of memory) awarded as a secondary service connection for a mental illness? Take care!
Thus, I quite often comment that "possessing well-informed knowledge is truly a powerful equalizer!"
Best Wishes!