Hipaa baa vendor assessment

HIPAA BAA Vendor Assessment

Overview

This skill performs structured Business Associate Agreement (BAA) review for vendors that create, receive, maintain, or transmit ePHI on behalf of a covered entity or business associate. Key regulations:

• 45 CFR §164.502(e): BA may use/disclose ePHI only per BAA or law
• 45 CFR §164.504(e): Required BAA provisions
• 45 CFR §164.308(b)(1): Business associate contracts and other arrangements

LLM and MCP ecosystems introduce non-obvious subprocessors: model hosts, vector DBs, prompt logging, crash reporters, and MCP registry operators. This skill produces a vendor-by-vendor compliance matrix with pass/fail on mandatory BAA clauses—not a substitute for legal counsel.

When to Use

Use this skill when:

• Onboarding an LLM provider (OpenAI, Anthropic, Azure OpenAI, AWS Bedrock) for ePHI-adjacent workloads
• Evaluating cloud infrastructure (AWS, GCP, Azure) for HIPAA workloads
• Assessing MCP server operators or self-hosted MCP with third-party dependencies
• Reviewing observability, logging, or support tools that may capture prompts/responses
• Annual BAA renewal or subprocessor change notification review
• Determining whether a vendor is a Business Associate vs conduit exception

Do not use this skill when:

• Vendor handles only de-identified data with expert determination (confirm de-identification first)
• Pure PCI card processing without ePHI (use PCI skills)
• Technical control testing of encryption (use hipaa-technical-safeguards)

Core Process

Execute steps in order.

Step 1: Vendor inventory and BA determination

1. List all vendors in the ePHI processing chain:
   • LLM API provider, cloud host, MCP server host, CDN, email, ticketing, SIEM
2. For each vendor, determine status:
   • Business Associate: accesses ePHI on behalf of CE/BA → BAA required
   • Conduit: transient access only (e.g., TLS VPN pipe)—document narrow exception analysis
   • Not in scope: no ePHI access—document exclusion rationale
3. Record: vendor-inventory-{id}.csv with data types, access mode, BAA status.

Step 2: BAA availability verification

1. Confirm vendor offers a HIPAA BAA (signed or click-through for cloud).
2. Verify BAA covers the specific services in use (e.g., Azure OpenAI vs general Azure—not all SKUs are covered).
3. For LLM vendors, confirm:
   • Zero data retention / no training on customer data (contractual, not marketing)
   • Geographic processing restrictions if required
   • Subprocessor list and notification process
4. BLOCK production ePHI flows to vendors without executed BAA.

Step 3: Mandatory BAA clause checklist (§164.504(e))

Review executed or draft BAA for each required element:

§164.504(e) element	Pass criteria
Permitted uses/disclosures	Limited to BAA, CE instruction, or law
Safeguards	Appropriate safeguards per Security Rule
Subcontractors	BA requires same restrictions via subcontractor agreement
Report breaches	BA reports breaches to CE per §164.410
Access/amendment/accounting	BA supports individual rights where applicable
HHS access	BA makes internal practices available to HHS
Termination	CE may terminate if BA violates material terms
Return/destruction	ePHI returned or destroyed at termination

Mark each PASS, FAIL, or NEEDS LEGAL REVIEW.

Step 4: LLM-specific addendum review

For each LLM vendor, verify contractual terms on:

1. Input/output logging: what is logged, retention period, who can access
2. Model training: explicit prohibition on training/fine-tuning on customer ePHI
3. Human review: opt-out of human review of prompts containing ePHI
4. Region/data residency: matches organizational policy
5. API metadata: request IDs in logs—confirm they cannot reconstruct ePHI alone
6. Enterprise vs consumer tier: consumer tiers often lack BAA—FAIL if used for ePHI

Step 5: MCP server operator assessment

For each MCP server processing ePHI:

1. Identify operator (self-hosted, vendor-hosted, open-source with cloud telemetry).
2. Determine if operator accesses ePHI (tool inputs/outputs, server logs).
3. Require BAA or confirm operator is within CE boundary (employee/contractor under CE policies).
4. Review MCP dependency chain: npm packages with phone-home, crash analytics.
5. Document tool allowlist—MCP operator should not have broader access than BAA permits.

Step 6: Subprocessor cascade

1. Obtain vendor subprocessor list (LLM → cloud → CDN → support SaaS).
2. Verify flow-down obligations in BAA.
3. Flag new subprocessors added since last review.
4. Map subprocessors to ePHI exposure (HIGH: prompt storage; LOW: physical datacenter with no logical access).

Step 7: Gap remediation and risk acceptance

1. FAIL items: block ePHI until remediated or alternative vendor selected.
2. NEEDS LEGAL REVIEW: escalate with clause citation—do not auto-approve.
3. Document compensating controls only with legal and privacy officer approval.
4. Set BAA renewal calendar (annual minimum; 90-day subprocessor review).

Step 8: Evidence packaging

1. Store executed BAAs (redacted signatures if needed), subprocessor lists, assessment matrix.
2. SHA-256 hash all documents; link to vendor inventory IDs.
3. Produce summary for privacy officer sign-off.

Common Rationalizations

Excuse the agent might generate	Required rebuttal
"We redact PHI, so no BAA is needed with the LLM vendor."	Residual ePHI or re-identification risk may remain; vendor role is determined by access capability, not intent. Legal must confirm conduit/de-identified exceptions.
"Enterprise API terms say HIPAA—good enough without signed BAA."	Marketing language ≠ executed BAA with §164.504(e) clauses.
"MCP is open source, so there's no vendor."	Operator of the running instance and its telemetry dependencies may still be a BA.
"Subprocessors are the vendor's problem."	CE/BA retains oversight obligation—subprocessor notification must be monitored.
"Consumer ChatGPT Plus works for clinical summaries."	Consumer products typically lack BAA—automatic FAIL for ePHI.
"BAA review can wait until after pilot."	Pilot with real ePHI is production under HIPAA—BAA must precede ePHI flow.

Red Flags

• Production ePHI sent to LLM without executed BAA
• Consumer-tier LLM account used for clinical workflows
• Vendor subprocessor added with ePHI access and no notification review
• BAA missing breach notification or termination for cause clauses
• MCP server logs full tool payloads to non-BAA analytics
• "Conduit" exception claimed for vendor that stores prompts
• Verbal vendor assurance substituted for contractual BAA language

Verification

• Complete vendor inventory with BA/conduit/not-in-scope determination
• Executed BAA on file for every BA vendor before ePHI processing
• §164.504(e) checklist completed for each BAA
• LLM-specific addendum reviewed (training, logging, human review, tier)
• MCP operators assessed with dependency chain documented
• Subprocessor list current with change notification process verified
• FAIL items blocked or remediated—none silently waived
• Legal review queue documented for ambiguous clauses
• Evidence bundle hashed with privacy officer sign-off field
• BAA renewal and subprocessor review dates scheduled