Dual Eligible: Part D Copay and Medicaid Secondary
A 68-year-old patient has Medicare Part D and full Medicaid. They present a prescription for a 30-day supply of a Part D-covered brand drug. The Part D plan's contracted rate is $310; the plan requires a $45 copay, and the patient's Medicaid plan covers Part D cost-sharing. The pharmacy bills Part D first and receives a paid response with a $45 patient responsibility. The technician then submits to Medicaid as secondary. Medicaid rejects: 'Medicare Part D must be billed first-submit other coverage code.' The patient has $8 cash and cannot pay $45 today. The pharmacy's policy is not to waive copays. The Part D claim is valid and the drug is on formulary.
1. Why did Medicaid reject even though Part D was already billed? What information is missing or incorrectly submitted?
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The rejection does not mean Part D was not billed; it usually means the secondary claim did not carry the correct coordination-of-benefits information. Medicaid needs to see that Part D paid, the paid amount, and the patient liability. The technician should confirm the other-coverage code used on the Medicaid claim reflects a paid Part D claim, not 'no other coverage.' Also verify the patient ID and that the Part D claim number is included if required. Re-submit the Medicaid claim with the correct COB code and the Part D paid details. If it still rejects, call Medicaid provider services and document the reference number.
2. What is the correct order of billing, and how should the $45 copay be handled if Medicaid does not pay it?
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The correct order is Part D primary, Medicaid secondary. If Medicaid covers Part D cost-sharing, it should pay the $45 or the covered portion. If Medicaid denies after correct COB submission, the patient owes the copay unless another legitimate assistance program applies. The pharmacy cannot routinely waive the copay because that could violate the plan contract and anti-kickback rules. The technician can check whether the manufacturer has a patient-assistance program for which the patient qualifies, or offer a short payment plan if store policy allows. Do not tell the patient the copay is waived. Document the denial and the patient's inability to pay.
3. The patient asks if they can just use a manufacturer copay card instead. What should the technician explain?
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The technician should explain that manufacturer copay cards are generally not available to Medicare or Medicaid beneficiaries. Federal anti-kickback rules restrict manufacturer assistance to federal health care program enrollees. Using a copay card while billing Medicaid could create a false claim or inducement issue. If the patient has commercial insurance in addition to Medicare, that would be unusual and needs verification, but here Part D and Medicaid are the payers. The correct path is to fix the Medicaid secondary claim. If the patient still cannot pay, offer lawful options such as a payment plan or manufacturer patient-assistance program, not a copay card.