Medicaid Fee-for-Service vs Managed Care HMO: Dual Eligible Underwriting & Capitation Rates 2026

## Medicaid Reimbursement Architecture: FFS vs Managed Care (MCO)

State Medicaid programs have transitioned over 75% of beneficiaries into comprehensive risk-based Managed Care Organizations (MCOs), commonly referred to as Medicaid HMOs. Actuaries and healthcare CFOs evaluate the economic trade-offs across state capitation models, Medical Loss Ratio (MLR) minimums, and provider reimbursement fee schedules.

### 1. Actuarial Soundness and Risk-Adjusted Capitation Rates

Under 42 CFR Section 438.4, state capitation payments to Medicaid HMOs must be actuarially sound, meaning rates are projected to cover all reasonable, appropriate, and attainable costs for the enrolled population. The capitation rate per member per month (PMPM) is modeled as:

$$\text{PMPM Rate} = \sum_{k=1}^{n} \left( \text{Baseline Cost}_k \times \text{Trend Factor}_k \times \text{Risk Score}_i \right) + \text{Admin Allowance} + \text{Underwriting Margin}$$

| Program Dimension | Traditional Fee-for-Service (FFS) | Medicaid Managed Care (HMO/MCO) | Dual Eligible Special Needs (D-SNP) |
|:------------------|:----------------------------------|:--------------------------------|:------------------------------------|
| Payment Mechanism | Retrospective claims submission | Prospective monthly capitation | Blended Medicare-Medicaid capitation|
| Risk Bearer | State government agency | Private MCO carrier | Integrated Medicare Advantage MCO |
| Statutory MLR | N/A (Direct state treasury) | 85% Minimum MLR (42 CFR 438.8) | 85% Minimum MLR with rebates |
| Network Structure | Any enrolled Medicaid provider | Restricted HMO provider network | Coordinated care team network |

### 2. Dual Eligible Alignment: Medicare Advantage vs Medicaid HMO

For beneficiaries qualifying for both Medicare and Medicaid ('Duals'), uncoordinated fee-for-service creates cost-shifting incentives between federal Part A/B budgets and state Medicaid long-term services and supports (LTSS). Dual Eligible Special Needs Plans (D-SNPs) pool these revenue streams to eliminate diagnostic fragmentation.