Quick Answer
What is a TPA in health insurance? A third-party administrator (TPA) is an organization hired by an employer to handle the day-to-day operations of a self-funded health plan: processing claims, managing provider networks, issuing ID cards, and providing customer service. The TPA is not your insurer—your employer funds the plan and pays the claims. The TPA processes them. The phone number on your insurance card connects you to the TPA. According to KFF’s 2025 Employer Health Benefits Survey, 67% of covered workers are in self-funded plans administered by TPAs.
What Is a Third-Party Administrator (TPA)? Who Actually Processes Your Health Plan Claims
You call the number on the back of your health insurance card. Someone answers: “Thank you for calling [carrier name], how can I help you?”
You assume you’re talking to your insurance company. In most cases, you’re not.
You’re talking to your plan’s third-party administrator—the TPA—and understanding what that means can save you time, frustration, and confusion every time you interact with your health plan.
What a TPA Is (and What It Isn’t)
A third-party administrator is an organization that handles the administrative operations of a health plan on behalf of the employer. In a self-funded plan—where the employer pays for employees’ medical claims from its own funds rather than purchasing insurance—the TPA provides the operational infrastructure.
What a TPA does:
- Processes and adjudicates medical, dental, and pharmacy claims
- Manages provider networks (or provides access to carrier networks)
- Issues health plan ID cards
- Operates the customer service line
- Provides the technology platform (online portals, mobile apps)
- Sends Explanations of Benefits (EOBs) to members
- Assists with regulatory compliance (ERISA, HIPAA, ACA)
- Coordinates stop-loss insurance claims on behalf of the employer
What a TPA is not:
- Not the insurer. The TPA does not bear financial risk for your claims. Your employer does.
- Not the decision-maker on plan design. Your employer designs the plan (what’s covered, what’s not). The TPA administers those decisions.
- Not the entity that funds your coverage. Claims are paid from the employer’s funds or trust account. The TPA processes the payment.
The simplest way to think about it: your employer is the restaurant owner. The TPA is the management company that runs the kitchen, hires the wait staff, and handles reservations. The food is paid for by the owner. The management company makes sure it gets to your table.
Why TPAs Exist
Self-funded employers need administrative infrastructure. Processing medical claims, maintaining provider networks, running a customer service operation, printing ID cards, adjudicating coverage disputes, and managing regulatory compliance requires specialized expertise and technology that most employers don’t have in-house.
Rather than building this capability internally, employers contract with TPAs to provide it. This is why major insurance carriers—Cigna, Anthem, Aetna, UnitedHealthcare—also serve as TPAs for self-funded plans. They already have the networks, the claims systems, and the customer service infrastructure. They simply operate in a different capacity: as service providers rather than risk-bearers.
Some TPAs are independent companies that don’t sell insurance at all—firms that specialize exclusively in claims administration for self-funded plans. Others are subsidiaries or divisions of major carriers. From the employee’s perspective, the experience is virtually identical regardless of which type of TPA administers the plan.
The TPA model is central to the growth of self-funded plans. According to KFF’s 2025 survey, 67% of covered workers are now in self-funded plans—and virtually every one of those plans uses a TPA for day-to-day administration. (For more on why self-funded plans have become the majority model, see our guide on why 67% of workers are in self-funded plans.)
How Your Claims Actually Flow: A Step-by-Step View
Understanding the claims flow clarifies who does what—and who to contact when something goes wrong.
| Step | What Happens | Who’s Involved |
| 1. You receive care | You visit a doctor, have lab work, fill a prescription, or receive a medical service. | You and the healthcare provider |
| 2. Provider submits a claim | Your provider submits a claim to the TPA using the information on your ID card—procedure codes, diagnosis codes, and charges. | The provider and the TPA |
| 3. TPA adjudicates the claim | The TPA reviews the claim against your plan’s rules (the plan document): Is the service covered? Was it in-network? Has the deductible been met? What’s the copay or coinsurance? | The TPA, applying the employer’s plan document |
| 4. Payment is issued | If the claim is approved, the TPA issues payment from the employer’s trust fund or designated account. The money comes from the employer—the TPA processes the transaction. | The TPA (processing) and the employer (funding) |
| 5. You receive an EOB | The TPA sends you an Explanation of Benefits showing what was billed, what the plan paid, and what you owe. This is not a bill. | The TPA sends it; the provider sends the actual bill separately |
| 6. You pay your portion | You receive a bill from the provider for your deductible, copay, or coinsurance amount. This should match the “your responsibility” amount on the EOB. | You and the provider |
Key insight: at no point in this process does the TPA use its own money. The TPA is the processing engine. The employer is the funding source. This is why the logo on your card can say Cigna while the entity paying your claims is your employer—Cigna is acting as the TPA, not the insurer. (For help understanding the EOB you receive in step 5, see our guide to reading your EOB without confusion.)
Who to Contact When Something Goes Wrong
Knowing whether to call the TPA, the employer, or a federal agency depends on the nature of the issue. Getting this wrong wastes time—and in a claims dispute, time matters.
| The Issue | Who to Contact | Why |
| Billing question (charges, amounts, payment status) | The TPA — call the number on your ID card | The TPA processes claims and can look up claim status, payment amounts, and processing details. |
| Benefit or coverage question (is this service covered?) | The TPA first, then the plan administrator if you need a formal determination | The TPA can explain coverage based on plan documents. For a formal coverage determination, the plan administrator (often the employer) has final authority. |
| Claim denied and you want to appeal | The plan administrator — identified in your Summary Plan Description (SPD) | Appeals under ERISA go to the plan administrator, not the TPA. Your SPD explains the appeals process, deadlines, and where to submit. |
| Provider billed you more than the EOB says you owe | The provider’s billing department | This is a provider billing error, not a plan issue. The provider needs to reconcile their records with the plan’s payment. |
| You suspect fraud or abuse | The TPA first, then the plan administrator | Report suspected fraud to the TPA’s fraud hotline (often listed on your ID card or the plan’s website). |
| Procedural violation or unresolved dispute | Department of Labor EBSA: 1-866-444-3272 | EBSA oversees ERISA-governed plans and can investigate whether the plan followed proper procedures. |
The most common mistake: calling the TPA about a denied claim and expecting them to overturn it. The TPA processes claims according to the plan document. If the plan document excludes a service, the TPA cannot override that exclusion. Appeals for denied claims go to the plan administrator—which is your employer or a designated fiduciary, not the TPA. (For the full appeals process, see our guide to ERISA health plan appeals.)
Why TPA Quality Varies—And Why It Matters
Not all TPAs perform equally. The quality of your health plan experience—how quickly claims are processed, how accurately they’re adjudicated, how responsive customer service is—depends significantly on the TPA, not just on the plan design.
Where Quality Shows Up
Claims processing speed. Some TPAs process clean claims within 5–10 business days. Others take 30 days or longer. A slow TPA creates the experience of “unpaid claims” even when the employer’s trust fund is fully capitalized and the plan is financially healthy. Providers who wait too long for payment may send balance bills to members—creating confusion that originates with the TPA’s processing time, not the plan’s coverage.
Adjudication accuracy. Claims adjudicated against the wrong plan provision, coded incorrectly, or processed as out-of-network when the provider is in-network generate denials that shouldn’t happen. Georgetown University’s Center on Health Insurance Reforms has documented concerns about TPA claims review practices, noting that some TPAs may allow improper payments and then collect fees for recovering the errors post-payment—a misaligned incentive structure.
Customer service responsiveness. When you call the number on your card, you’re calling the TPA. Hold times, agent knowledge, resolution rates, and follow-through all depend on the TPA’s staffing and training—not on your employer’s intentions.
Network management. TPAs that use their own proprietary networks or lease access to carrier networks can have different provider directories, different negotiated rates, and different network adequacy depending on geography. A plan that works well in one city may have thin coverage in another—and the TPA’s network is the determining factor.
The Implication for Participants
When your experience with a health plan is poor—slow claims, unexpected denials, unresponsive customer service—the problem may be the TPA, not the plan itself. Understanding this distinction helps you identify where the issue actually lives and direct feedback to the right place: the TPA for administrative problems, the plan administrator for coverage disputes.
How to Verify Your Plan’s TPA
Every legitimate self-funded health plan identifies its TPA. Here’s where to look.
Check Your ID Card
The logo and customer service number on your health plan ID card identify the TPA. If the card says Cigna but your employer is the plan sponsor (identified in your SPD), then Cigna is your TPA.
Read Your Summary Plan Description (SPD)
Your SPD is required to identify the plan administrator, the claims administrator (the TPA), and the plan sponsor (your employer). Look for sections titled “General Plan Information” or “Plan Administration.” The TPA will be identified as the entity that processes claims or administers benefits.
Ask HR or Your Benefits Team
A direct question—“Who is our plan’s TPA, and who is the plan administrator for appeals purposes?”—will get a direct answer. These are not sensitive details. Every plan participant has the right to know.
What to Watch For
- If your plan cannot identify a TPA, that’s a concern. Every properly structured self-funded plan uses a TPA or the employer itself performs administration (which is disclosed in plan documents).
- If the same entity is listed as both plan administrator and TPA, it’s important to know whether that entity is your employer or a third party—because appeals for denied claims go to the plan administrator, and you want to know who that is before you need to use it.
Frequently Asked Questions
What does a TPA do in health insurance?
A third-party administrator processes claims, manages provider networks, issues ID cards, operates the customer service line, sends EOBs, and handles administrative compliance for self-funded employer health plans. The TPA administers the plan but does not fund it—your employer pays the claims.
Is a TPA the same as an insurance company?
No. An insurance company assumes financial risk and pays claims from its own reserves. A TPA processes claims on behalf of the employer, who bears the financial risk. Major carriers like Cigna, Anthem, and UnitedHealthcare serve as TPAs for self-funded plans while also selling insurance products under the same brand—which is why the distinction is confusing.
Who do I call if my claim is denied—the TPA or my employer?
For information about why the claim was denied, call the TPA (the number on your card). To formally appeal the denial, submit your appeal to the plan administrator, which is identified in your Summary Plan Description. The plan administrator—often your employer or a designated fiduciary—has final authority over appeals under ERISA.
Can a TPA deny my claim?
The TPA adjudicates claims according to the plan document your employer created. If the plan document excludes a service, the TPA processes the denial accordingly. The TPA is applying the plan’s rules, not making independent coverage decisions. If you believe the denial is wrong, your appeal goes to the plan administrator.
How do I know who my TPA is?
Check the logo and customer service number on your health plan ID card—that’s your TPA. Your Summary Plan Description also identifies the TPA (called the “claims administrator”) separately from the plan administrator and plan sponsor.
Key Takeaways
- A TPA is the organization that processes your health plan claims, manages your network, and operates customer service. It is not your insurer—it’s the administrative engine behind your employer’s self-funded plan.
- The logo on your ID card identifies the TPA, not necessarily the entity paying your claims. In a self-funded plan, your employer funds the claims; the TPA processes them.
- Claims flow from you → provider → TPA (adjudicates and pays from employer’s funds) → EOB to you → bill from provider. Understanding this flow tells you who to contact at each stage.
- For billing questions, call the TPA. For appeals, contact the plan administrator (identified in your SPD). For unresolved disputes, contact DOL EBSA at 1-866-444-3272.
- TPA quality varies. Slow claims processing, adjudication errors, and poor customer service reflect TPA performance, not necessarily plan design. Knowing the distinction helps you direct feedback accurately.
- Every legitimate self-funded plan identifies its TPA in the SPD, on the ID card, and through the employer’s HR or benefits team.
Published by LifeX Research Corp. LifeX is an employer-sponsored health research organization operating under an ERISA-governed, self-funded framework. LifeX provides health benefits to its research associates through licensed third-party administrators. LifeX is not an insurance company or a TPA. This content is for informational and educational purposes only and does not constitute legal or benefits advice. For questions about your specific plan, contact the TPA listed on your ID card or the plan administrator identified in your SPD.
