> ## Documentation Index > Fetch the complete documentation index at: https://docs.sigmahmis.com/llms.txt > Use this file to discover all available pages before exploring further. # Sigma Health HMIS: Cloud-Native Clinic Revenue Platform > Sigma Health HMIS connects clinic billing, insurance claims, and payment reconciliation into one continuous revenue trail from visit to cash. Sigma Health HMIS is a cloud-native Health Management Information System designed to stop clinics from losing revenue after a patient visit. In most clinics, billing, claims, and payments live in separate systems — or worse, in spreadsheets and paper files. That gap is where revenue leaks: claims get submitted late, payments arrive unmatched, and rejections go unnoticed until month-end. Sigma closes that gap by connecting every visit to an invoice, every invoice to a claim, and every claim to a payment, all in one platform that your team can access from anywhere without managing a single server. ## The Revenue Trail Sigma is built around a simple principle: money should always be traceable back to the care that earned it. The three-step revenue trail keeps that traceability intact across every patient encounter. Every patient encounter logged in Sigma automatically generates a visit-linked invoice. Charges are attached at the point of care, so nothing is forgotten between the consultation room and the billing desk. Each invoice feeds directly into a claim. Sigma pre-fills claim fields — scheme codes, diagnosis information, authorization numbers, and payer details — from the patient record and the visit data. Your billing team reviews and submits without re-keying anything. When the insurer processes the claim, Sigma captures the remittance and matches it to the original claim. Partial payments, rejections, and underpayments are surfaced immediately so your team can act — not discover the problem three months later. ## Who Uses Sigma HMIS Sigma is designed for the clinical operations teams responsible for revenue — not just the people providing care. * **Reception** staff register patients, record visit details, and ensure demographic and scheme information is captured accurately before the billing cycle begins. * **Billing Staff** create and review invoices, prepare and submit insurance claims, and manage claim follow-up when insurers respond with approvals, rejections, or partial payments. * **Claims Staff** monitor claim submissions, track statuses through the full claim lifecycle, and handle resubmissions when claims are rejected or returned. * **Finance** staff oversee payment reconciliation, review remittance advices, and report on outstanding balances across locations. * **Admin** users manage team access and permissions, configure insurer schemes, and have full visibility across all modules and locations. ## Core Modules Generate visit-linked invoices with built-in billing rules. Capture every charge at the point of care. Submit claims to insurers, track their status in real time, and manage rejections and resubmissions. Match remittances to open claims, reconcile deposits, and flag discrepancies automatically. ## Key Capabilities Sigma HMIS ships with a comprehensive set of features designed around real clinic billing workflows: * **Visit-linked invoicing** — every invoice is generated from an encounter record, eliminating manual charge capture * **Built-in billing rules** — apply scheme-specific rules and fee schedules automatically at the time of invoicing * **Full claim status tracking** — monitor each claim through its complete lifecycle: Submitted, Awaiting Response, Approved, Rejected, Paid, or Waiting * **Remittance matching** — automatically reconcile insurer payments against open claims and flag unmatched amounts * **Real-time revenue dashboard** — see outstanding invoices, pending claims, and received payments at a glance * **Multi-insurer and multi-scheme support** — manage relationships with multiple medical aid schemes and private insurers in a single workspace * **Role-based access control (RBAC)** — assign granular permissions so each staff member sees only what their role requires * **Cloud-native, no servers required** — Sigma runs entirely in the cloud; your team can access it from any browser, and your IT team has nothing to maintain Sigma HMIS is an administrative platform for clinical billing, claims management, and payment reconciliation. It does not provide medical advice or clinical decision support. This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.