What is Pass-Through-BAA VS Direct BAA For Healthcare Marketing Companies

The core difference comes down to who is legally accountable to you and how many companies touch your patient data. When dealing with your healthcare website provider, here is exactly how the two setups look and why it matters for your HIPAA compliance:

Direct BAA

A Direct BAA is a 1-to-1 legal contract signed directly between your medical practice and your website provider.

• How it works: Your website provider builds your site, manages your contact forms, and hosts the data themselves on their own secure infrastructure.
• The Relationship: Direct. If there is a data breach or a security question, you deal directly with the website provider. They take 100% of the responsibility for protecting your patients’ data.
• The Benefit: Complete transparency and clear lines of liability. You know exactly who has your data and who is accountable. 

Pass-Through BAA

A Pass-Through BAA occurs when your website provider acts as a middleman and uses other third-party companies to actually handle your patient data.

• How it works: You sign a BAA with your website provider. However, that provider doesn’t actually store your data or run the forms. Instead, they “pass down” the HIPAA obligations to other vendors—like a separate form-building company, a third-party server company, or an external database. 
• The Relationship: Fragmented. Your website provider is essentially saying, “We promise to be compliant, and we made our subcontractors promise to be compliant, too.”
• The Risk: If a patient’s data is leaked from an online form, it can be incredibly difficult to figure out who is at fault. The website provider might blame the form software company, who then blames the server company. You have no direct legal relationship with those secondary companies.

Side-by-Side Comparison

Feature	Direct BAA	Pass-Through BAA
Who handles the data?	The website provider itself.	Multiple third-party subcontractors.
Who is liable to you?	The website provider directly.	The provider (but they will try to shift blame downstream).
Data Security	High control; data stays in one place.	Lower control; data is handed off multiple times.
Audit Trail	Easy to trace and monitor.	Hard to trace across multiple companies.

A Pass-Through BAA relies on a “chain of trust” under HIPAA regulations (technically known as a Business Associate Subcontractor Agreement, or BASA). This happens when your primary marketing vendor uses other third-party software companies to get the job done.

• How it Works: Your clinic signs a Direct BAA with a marketing agency. However, the agency does not own the servers or the software. They use Amazon Web Services (AWS) to host your site, CallRail to track phone calls, and an enterprise email tool to send newsletters. The agency must then sign a “Pass-Through” BAA with each of those sub-vendors.
• The Middleware Scenario: This is also how “analytics proxies” (like Freshpaint) work. Because Google Analytics refuses to sign a BAA, you sign a BAA with the proxy software. The proxy intercepts the data, strips out the PHI, and “passes through” only the clean, anonymous data to Google.
• The Advantage: Flexibility and customization. A Pass-Through model allows a marketing agency to build a custom “tech stack” using the best third-party tools on the market, rather than forcing you to use a proprietary system.
• The Disadvantage (The Weak Link): Every time data is passed to a new subcontractor, the risk of a breach increases. If the marketing agency forgets to sign a downstream BAA with a new calendar plugin they installed on your website, your clinic can still be held liable for a HIPAA violation.

Which Model is Better for Your Clinic?

Neither model is inherently illegal or “wrong,” but they serve different business needs.

If your priority is maximum security, predictable costs, and streamlined liability, choose a vendor that offers a Direct BAA built on proprietary tech. It guarantees that your data is not bouncing across six different software platforms.

If you have a massive marketing budget and require highly complex, custom integrations (like connecting specialized EMRs to external billing and custom ad-tracking dashboards), you will likely need an agency that manages a Pass-Through BAA network to utilize those specialized third-party tools.