NextGen Healthcare Indian Health Service Epic Systems Corporation eClinicalWorks, LLC 1 1 1 1 1 1 2 2 2 4 5 5 7 1 11 27 1 3 12. ... Marias Health Services. Shelby. Northwest CHC. Libby. Partnership Health Center. Missoula. RiverStone Health. ... Part of the current EHR solution includes a state-of-the-art patient portal known as My HealtheVet ....