If you are looking for work in Oregon, you do not have to disclose your disability during the hiring process, and you may prefer to keep it to yourself if you are able. After all, you have likely had experiences where people make unfair judgements or discriminate against you when they learn of your medical issue. On the other hand, your disability may be obvious, for example, if you use a wheelchair or have a visual impairment.
Even if you are well qualified for a position you are seeking, you may worry that your future employer will be unwilling to make the accommodations you require to do the job successfully. It is important to understand your rights and protections under the Americans with Disabilities Act.