A Qualified Medicare Beneficiary (QMB) is a Medicare beneficiary who qualifies for Medicaid assistance with Medicare Part A and Part B premiums, deductibles, copayments, and coinsurance. QMB status is determined by state Medicaid programs based on income and resource criteria.
In connected care, QMB status is significant because it defines the highest reimbursement tier of APCM. HCPCS G0558 (Level 3 APCM) is specifically designated for patients with two or more chronic conditions who are QMBs. CMS set a higher reimbursement for this tier based on the premise that QMB patients face greater social complexity, more barriers to care, and higher resource needs. Providers cannot bill QMB patients directly for Medicare cost-sharing amounts, which makes care for this population more financially challenging without the elevated reimbursement.
QMB beneficiaries are sometimes referred to as "dual-eligible" beneficiaries, meaning they qualify for both Medicare and Medicaid. CMS Chronic Condition Data Warehouse data consistently shows that dual-eligible beneficiaries have higher prevalence of multiple chronic conditions and higher per-beneficiary spending than non-dual beneficiaries.
Sources:
Social Security Act ยง 1905(p);
CMS Medicare Savings Programs overview;
CMS CY 2025 PFS Final Rule (APCM code definitions).
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