The Stakeholders

How to read this section

The players sort into four buckets. Money flows roughly left to right, and accountability flows back the other way:

1. Those who hold the money — payers, in the many forms they take (commercial, government, self-funded).
2. The middlemen — entities that don't bear insurance risk but process, route, or manage a slice of it for a fee.
3. Those who deliver the care — providers, from a national health system down to a solo practice or a nursing home.
4. The people it's for, and the people who police it — members and regulators.

Almost every other section of this map — How Money Flows, Coverage & Benefits, Utilization Management — is just two or more of these stakeholders interacting under a set of rules.

The players

Those who hold the money (payers)

• Payers (Health Plans) — the entity holding the check-book: collects premiums, decides what's covered, pays the claims. Everything orbits this role.
• Commercial & Employer-Sponsored Insurance — coverage bought by or through employers; still the largest single way Americans get insured.
• Self-Funded Plans & ASO — most large employers don't buy insurance at all; they pay claims themselves and rent administration. Governed by ERISA, not state insurance law.
• Medicare — the federal program for people 65+ and some disabled, split into Parts A/B/D; the price-setter the whole industry benchmarks against.
• Medicare Advantage — private plans paid a risk-adjusted per-member rate to cover Medicare members. Fast-growing, data-hungry, Stars-driven.
• Medicaid & Managed Medicaid — state-federal coverage for low-income people, now mostly run by private plans on thin capitated margins (~78% of enrollees sit in managed care).
• Dual Eligibles & D-SNPs — the roughly 12 million people on both Medicare and Medicaid; the sickest, costliest, most fragmented population, served by specialized plans.
• ACA Marketplace Plans — individual coverage bought on the exchanges with income-based subsidies; small market, outsized policy attention.
• TRICARE & VA Health — coverage for the military, their families, and veterans; their own rules and their own rails.

The middlemen (process and route, don't bear risk)

• Third Party Administrators (TPAs) — run claims, eligibility, and networks for self-funded employers without taking the insurance risk. The plumbing under most large-employer plans.
• Clearinghouses — the switchboards that route, scrub, and translate EDI transactions between providers and payers.
• Specialty Benefit Managers — carve-out vendors that manage a single high-cost category (imaging, oncology, musculoskeletal, dental) and own the prior auth for it.
• Brokers, Consultants & Benefits Advisors — the sales-and-advice layer that decides which plan an employer buys; the channel you sell through, not around.

Those who deliver the care (providers)

• Providers & Health Systems — hospitals, physicians, and the integrated systems that employ them; where the care happens and the bills originate.
• Physician Groups, IPAs & Medical Groups — how doctors organize to contract, and increasingly to take risk and run their own utilization management.
• Post-Acute & Long-Term Care — skilled nursing, home health, rehab, hospice; high-spend, heavily reviewed, chronically under-automated.

Who it's for, and who polices it

• Members & Patients — the person the coverage is for; the one with the least information and the most at stake.
• Regulators & Oversight Bodies — CMS, state insurance departments, and accreditors like NCQA that set the rules everyone else plays by.

How this section connects to the rest of the map

These stakeholders are the nouns; the rest of the vault is the verbs. How Money Flows traces the dollar between them. Coverage & Benefits sets the rules a payer uses to decide what it owes a provider. Utilization Management is the gate a payer runs against a provider's request. Regulation & Policy holds the constraints that bind each player differently depending on its line of business. Get the cast straight here, then watch them act everywhere else.

Related

• Home
• How Money Flows
• Coverage & Benefits
• Utilization Management
• Regulation & Policy
• The Premium Dollar
• Payers (Health Plans)
• Providers & Health Systems
• Members & Patients
• Regulators & Oversight Bodies
• The Cost of Administrative Complexity
• The 90-Second Mental Model

Sources

• KFF, 10 Things to Know About Medicaid Managed Care (≈78% of Medicaid enrollees in risk-based MCOs, 2024): https://www.kff.org/medicaid/10-things-to-know-about-medicaid-managed-care/
• MACPAC, Data Book: Beneficiaries Dually Eligible for Medicare and Medicaid (dual-eligible population ≈12 million): https://www.macpac.gov/publication/data-book-beneficiaries-dually-eligible-for-medicare-and-medicaid-3/

More in this section

• Group Purchasing Organizations (GPOs) — provider-side supply-chain buying blocs