Partner growth managers (PGM) at Stax Connect have a front-row seat to the exact moment a software company transitions from selling a vision to operating a payments business. Today, leading vertical SaaS platforms are generating 30% to 40% of their total revenue entirely through embedded financial services, yielding gross margins up to three times higher than traditional standalone software subscriptions. But recognizing the opportunity of embedded payments for healthcare software and actually executing it with a true healthcare ISV payments partner are two very different things.
When a new practice management system or electronic health record (EHR) platform signs with Stax Connect, the first 90 days dictate the trajectory of the entire partnership. As a dedicated healthcare ISV payments partner, our mission is to guide platforms through the technical integration, go-to-market rollout, and merchant adoption phases. We treat payments as a growth lever, helping healthcare platforms to fine tune the payment experience while optimizing operational efficiency.
Based on dozens of recent launches, here is a field report on what those first three months actually look like—the questions ISVs ask when the ink dries, the surcharging conversations that inevitably surface, the unexpected driver behind attachment rates, and the support realities that emerge at scale.
The three questions partners ask in onboarding
During the initial healthcare payment integration onboarding, the conversation shifts from theoretical revenue share to operational reality. Product and engineering leaders suddenly realize they are about to move real money for real medical practices. In those first few weeks, three specific questions dominate our kickoff calls:
- “How do we protect our HIPAA scope?” This is always the first technical hurdle. General-purpose processors often mix clinical metadata with transaction data, forcing the ISV to execute complex Business Associate Agreements (BAAs) and expanding their audit surface. Stax processes card data only and never receives Protected Health Information (PHI). Because card data alone is not PHI, no BAA is required between the practice and Stax. We keep the payment layer cleanly isolated from their clinical software’s HIPAA scope, while ensuring everything runs on a PCI DSS v4.0 compliant stack.
- “What happens when a specialized practice gets stuck in underwriting?” Generic processors rely on rigid, algorithmic underwriting that frequently flags high-ticket medical, dental, or elective procedures. When a $5,000 orthodontic treatment triggers an automated fund hold, the ISV takes the blame. In onboarding, we walk partners through our flexible underwriting model. Because we handle the underwriting directly, we can evaluate specialized healthcare merchants on their actual clinical models, allowing us to approve practices that other processors automatically decline.
- “Who handles the angry phone call?” CTOs are terrified that their engineering team is about to become a patient payments help desk. We outline our support architecture immediately: Stax Connect provides dedicated, US-based support with healthcare implementation expertise. Whether it is a terminal connectivity issue at the front desk or a batch settlement question, our team shoulders the merchant escalations so the ISV’s team can stay focused on building clinical features.
Months one and two: The inevitable surcharging conversation
As we move through the first 30 to 60 days, we start marketing the new embedded payment solution to the ISV’s existing merchant base. Almost immediately, a recurring conversation bubbles up from the practices: How can we offset our credit card processing costs?
Many ISV leaders underestimate how sensitive their merchants are to processing fees, especially in high-ticket sub-verticals like restorative dentistry, optometry, and elective surgery. They quickly realize that surcharging is a massive merchant retention lever.
Instead of leaving the ISV to build a custom compliance workaround, we show them how to activate compliant surcharging natively within the partner program. We walk them through how the platform automatically enforces the strict card-brand cap, ensures debit cards are never surcharged so patients are protected, and handles receipt disclosure. We also introduce them to our 3+1 Surcharge Merchant Fee program, which allows partners to compliantly monetize surcharged transactions while passing savings to the clinic. Notably, Stax is the only surcharging partner for Mastercard’s Click-to-Pay product, which gives practices a fully compliant digital checkout.
Day 60: The unexpected attach-rate driver
By the end of the second month, we are aggressively tracking the healthcare SaaS payment attachment rate. This is where the structural advantage of our onboarding models becomes incredibly clear.
While we offer Stax Connect (a standard reseller model where the ISV owns all merchant sales and frontline support), we see a massive attachment-rate uplift when partners deploy Stax Connect Plus. Under the Connect Plus referral model, Stax sells to and supports the merchant directly, placing our payments specialization right alongside the ISV’s software.
Why does this drive so much adoption? Because healthcare is a specialty. Generic processors struggle to explain complex medical workflows to an office manager. But when our Stax specialists get on the phone with a practice administrator, we speak their language. We understand how to navigate multi-provider ledgers, insurance-reconciled refunds, and end-of-day statement batch posting. By having a healthcare payments expert close the conversation, we win the payment moment faster and dramatically accelerate the ISV’s attachment rate.
Day 90: Support patterns at scale
As we cross the 90-day mark, the platform is humming. The ISV is processing substantial dollar amounts in patient volume, and the actual day-to-day support patterns emerge.
At scale, the value of deep account management eclipses the basic API integration. We see this most clearly in chargeback and dispute management. Medical billing disputes can be incredibly complex, often involving insurance adjudication delays. Instead of forcing the ISV to build a dispute-resolution dashboard from scratch, Stax provides human-assisted chargeback management. Our support team works directly with the clinics to navigate the evidence submission process.
For the ISV, this is the ultimate validation of the partnership. By day 90, their software is stickier, their practices are saving money through surcharging, and their revenue share is climbing. More importantly, they have added a highly profitable payments arm to their business without having to hire a massive internal risk, compliance, and support operation. That is what a true payments partnership looks like in the field.
