What is QMB status?
Qualified Medicare Beneficiaries are low-income Medicare patients whose premiums and cost sharing Medicaid covers. Federal law bars providers from billing them for Medicare deductibles, coinsurance or copays.
Medicare remittance, claim line
- Patient status
- QMB, from the 271
| Service | Allowed | Medicare paid | Coinsurance |
|---|---|---|---|
| 99214 Office visit | $128.40 | $102.72 | $25.68 |
- The $25.68 coinsurance goes to Medicaid as a crossover, not to the patient. Whatever Medicaid doesn't pay is written off.
The QMB program is part of Medicaid’s help for Medicare patients. It pays their Medicare Part A and B premiums, deductibles, coinsurance and copays. In return, providers who see them can’t bill them for any of that cost sharing, even if Medicaid pays less than the full amount.
Why it causes problems
- QMB status isn’t always obvious at the front desk, so patients receive statements they shouldn’t.
- Balance billing a QMB patient violates federal rules, whether or not the provider takes Medicaid.
- The cost sharing should cross over to Medicaid, but many systems move it to patient responsibility by default.
What to do
Check QMB status during eligibility verification, flag the patient, send the cost sharing to Medicaid as a secondary claim, and write off what’s left instead of billing the patient.
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