This legislation aims to expand federal benefits for members of the National Guard who sustain disabilities while serving on State active duty . It addresses a gap in current law by ensuring these individuals receive similar protections to those injured during federal active duty or inactive-duty training. The bill is titled the "Supporting Disabled National Guardsmen Act." Specifically, the bill amends Title 10, United States Code, to make National Guard members eligible for disability retirement from the Armed Forces if their disability is incurred during State active duty. It includes a crucial provision to prevent the duplication of benefits, requiring that any retired pay received be reduced if it overlaps with other Federal or State benefits for the same disability. Furthermore, the legislation amends Title 38, United States Code, to establish eligibility for health care services furnished by the Secretary of Veterans Affairs for disabilities and related conditions arising from State active duty. This VA health care is subject to available appropriations and requires individuals to first exhaust all claims against third-party payers before seeking reimbursement from the VA.