Yes, lupus is a condition covered by USA Social Security Disability www.ssa.gov/applyfordisability
. If your rheumy is advising you to file, that indicates s/he will support your claim and certify that your condition(s) warrant disability. Doesn't matter so much what the primary thinks -- focus on getting your paperwork filled out using the rheumy.
There is a very good chance you will be approved. Lupus is treated by rheumatologists (I don't know the specialty of your primary dr, usually they are internists, not lupus specialists.) SSD had me see their rheumy as part of the approval process.
Get the info from the SSD website and start gathering the documentation they ask for -- because it's certain you will not get anything if you do not apply!
Lynnwood, Lupus & Sjogren's Moderator
"Life is far too important to be taken seriously" - Oscar Wilde