Outpatient Services Inc.

OS Inc., also known as Outpatient Services Inc., is a provider of billing services to healthcare entities. The company is headquartered in the United States of America. Its core offering involves managing the billing and claims processes for hospitals, clinics, and other healthcare organizations. By handling these administrative functions, OS Inc. allows its clients to focus on patient care while ensuring accurate reimbursement. The service encompasses the submission of claims to insurers, tracking of payments, and patient invoicing.

The company's client base includes multiple healthcare organizations across different states, as evidenced by the 2018 breach incident. Affected entities named in the breach report include Spectrum Health Lakeland, the Idaho Department of Health and Welfare, Fort Healthcare, and Midwest Medical Center. These organizations reported specific numbers of impacted individuals, ranging from 1,100 patients at Spectrum Health Lakeland to 19,000 notifications at Fort Healthcare. Additional clients such as Tahoe Forest Health District, Sparta Community Hospital, and Sauk Prairie Healthcare were confirmed as affected but did not disclose notification volumes at the time of reporting. The geographic distribution of these clients indicates that OS Inc. serves a geographically diverse set of healthcare providers.

OS Inc.'s specialization in healthcare billing places it in a position where it routinely processes protected health information and other sensitive data. This focus on billing services distinguishes it from broader healthcare IT vendors that may offer clinical or electronic health record solutions. The 2018 phishing-related breach highlighted vulnerabilities in the company's security controls surrounding email and user authentication. Unauthorized access to its systems resulted in varied patient data exposures across the affected client organizations, underscoring the risk associated with third‑party service providers. While the public record does not specify OS Inc.'s ownership structure, parent‑subsidiary relationships, or exact employee count, the available information confirms its role as a U.S.–based billing service provider for healthcare entities.