Build vs Buy Claims Automation: What Should RCM Firms Weigh?

What is genuinely cheap to build in-house?

What is cheap to build is any software layer where the firm controls the inputs and its own people consume the outputs. A report generated from a practice management system export, a work queue detailing next steps for billers, or a dashboard highlighting client write-off categories can be built by one capable engineer in a matter of weeks. Because nothing outside the firm changes underneath these tools, they remain functional long after the initial build.

An in-house 835 remit parser also falls into this category, though with a major caveat. The X12 public standard is highly stable, making basic parsing straightforward. However, parsing only covers the easiest third of payment posting. The actual time sink is balancing the file to the deposit and matching each line to a claim, which requires heavy manual intervention. These internal reporting layers are cheap because they are finished products; a dashboard that works in January still works in June.

Why is the claims automation maintenance cost so high?

The total cost of ownership billing software calculations often miss the steepest expense: keeping third-party connectivity alive. What is expensive to maintain is anything depending on an external party that can change its interface without notice.

Four main areas drive this hidden claims automation maintenance cost:

• Payer portal automation: While standard 276/277 clearinghouse requests are stable, payers often answer them thinly. Useful answers hide behind payer portals, which frequently change layouts, login flows, or two-factor authentication rules, breaking automations instantly.
• ERA enrollment automation: Tracking enrollment is easy, but executing it requires navigating unique forms and channels for every payer. Automating this effectively demands building a bespoke workflow for every payer a firm's clients bill.
• Exception handling in claims automation: Handling long-tail exceptions, like reversals in one remit, a claim split across two remits, or a takeback netted from an unrelated check, requires highly specialized logic. First-generation in-house builds almost never handle these accurately.
• Code set revisions: Claim Adjustment Reason Codes (CARCs) and Remittance Advice Remark Codes (RARCs) update multiple times a year on a published schedule. An internal system that fails to ingest these updates will quietly misread remits.

Furthermore, any firm building its own software assumes the heavy burden of HIPAA compliance, including access controls, encrypted audit logs, and Business Associate Agreements (BAAs) for every client.

When is a billing company software build the right call?

Building is the correct path when a firm's operational footprint minimizes expensive connectivity maintenance, or when strict client requirements rule out external vendors. An RCM firm should pursue a billing company software build if:

• The firm operates on a single practice management system and bills a short, stable list of payers.
• The automation targets internal reporting, while clearinghouses adequately handle connectivity.
• The firm already employs full-time engineering staff, turning year-two maintenance into a reallocation rather than a net-new hire.
• A client's strict data requirements prohibit any third-party vendor from handling their protected health information.
• The firm's proprietary method of working claims is its primary market differentiator.

In these cases, a firm should build the cheap layer first. Building the queue where the firm's own judgment lives is a high-ROI endeavor, even if connectivity is outsourced later.

When should you buy RCM automation?

Buying makes strategic sense when payer connectivity becomes a bottleneck, when a firm lacks dedicated engineering staff, or when leadership wants a cost that moves with volume rather than with headcount. A firm working across dozens of practice management systems faces massive technical debt if it builds in-house.

Proper RCM automation vendor evaluation requires asking specific operational questions. Firms must uncover who makes the final claim decision, where the work runs (inside the existing system or a separate portal), and who absorbs the cost when a payer changes its login flow. Vendors whose core business is maintaining these connections absorb the upkeep as their primary job, shielding the RCM firm from costly operational interruptions.

What does a split build vs buy claims automation approach look like?

The most effective strategy is often a split approach. The firm builds and owns the reporting, the queue, and the strategic definitions, such as what constitutes a worked denial. The vendor handles the connectivity: asking every payer where a claim is, balancing remits, and keeping enrollments active.

The ultimate test of a successful split is whether the bought vendor layer writes answers directly back into the firm's existing practice management system. A vendor that forces staff into a separate portal has simply added more work. Daybook Health provides this exact split for billing companies, deploying AI agents for claim status, remits, and ERA enrollment directly inside existing systems. Billers retain total control over decisions, and tasks like the asking, the matching and the tracking done for every claim are billed per-unit rather than via expensive seat licenses.

Build vs Buy vs Split: A Quick Comparison