Does Medicare Cover MAT Treatment? A Comprehensive Guide

If you’re considering medication-assisted treatment (MAT) for opioid use disorder (OUD), or helping a loved one find options, insurance questions can feel daunting before you even make your first call. The good news: Medicare does cover MAT, and the coverage is more comprehensive than most people realize. Understanding exactly how it works, which medications are included, and what you’re likely to pay can make it considerably easier to take that first step.

This article covers:

• What Medicare covers for MAT and which parts of the program apply
• How coverage differs for methadone, buprenorphine, and naltrexone
• What out-of-pocket costs to expect, including if you also have Medicaid
• How to find a treatment program that accepts Medicare

Medicare Coverage for MAT: At a Glance

	Part A (Inpatient)	Part B (Outpatient/OTP)	Part C (Medicare Advantage)	Part D (Prescription Drug)
Methadone	Covered during inpatient stay	Covered through enrolled OTPs	Must mirror Original Medicare	Not covered for OUD treatment
Buprenorphine (Suboxone)	Covered during inpatient stay	Covered through OTP or doctor’s office	Must mirror Original Medicare	Covered as take-home prescription
Naltrexone	Covered during inpatient stay	Covered (injectable form)	Must mirror Original Medicare	Covered as oral prescription
Counseling and therapy	Covered (inpatient)	Covered as part of OTP bundled benefit	Must mirror Original Medicare	N/A
Drug testing	N/A	Covered as part of OTP bundled benefit	Must mirror Original Medicare	N/A
Typical cost-sharing	Standard inpatient cost-sharing	No copay after annual Part B deductible	Varies by plan	Varies by plan formulary

What Does Medicare Cover for MAT?

Medicare covers multiple parts of MAT for opioid use disorder, including counseling, drug testing, care coordination, and the medications themselves. This wasn’t always the case; for many years, coverage for addiction treatment was fragmented and inconsistent. The SUPPORT for Patients and Communities Act changed that in 2020 by creating a dedicated Opioid Treatment Program (OTP) benefit under Medicare Part B, effectively establishing MAT as standard medical care on par with treatment for any other chronic condition. [1]

An OTP is a facility enrolled in Medicare to provide comprehensive OUD treatment, certified by SAMHSA (the Substance Abuse and Mental Health Services Administration). Under the Part B OTP benefit, Medicare pays a bundled weekly rate that covers the following services together (rather than billing for each one separately):

• FDA-approved medications for OUD (methadone, buprenorphine, or naltrexone)
• Individual and group counseling
• Drug testing
• Intake assessments and periodic treatment reviews
• Peer recovery support services
• Care coordination and referrals

Which MAT Medications Does Medicare Cover?

MAT for opioid use disorder typically involves one of three FDA-approved medications: methadone, buprenorphine (often prescribed as Suboxone), or naltrexone (often prescribed as Vivitrol, an injectable extended-release formulation). Medicare covers all three, but the coverage pathway varies depending on the medication.

Does Medicare Cover Methadone Treatment?

Medicare covers methadone for opioid use disorder, but only through a Medicare-enrolled OTP under Part B. Methadone for OUD cannot be obtained through a Part D pharmacy prescription; federal law requires it to be dispensed through a licensed OTP, whether for on-site dosing or approved take-home doses. Once enrolled in a participating OTP, Part B covers methadone as part of the weekly bundled benefit, with no copay after your annual Part B deductible. [2]

Does Medicare Cover Buprenorphine and Naltrexone?

Both buprenorphine and naltrexone have more flexible coverage pathways. Either can be covered under Part B, whether through a Medicare-enrolled OTP or through a prescribing physician’s office, and both are also available under Part D for take-home use. Buprenorphine products like Suboxone are commonly prescribed for home use once a patient is stabilized, making Part D a practical option for many people in ongoing treatment. Vivitrol can be administered in a clinical setting under Part B, while oral naltrexone is available as a take-home prescription under Part D.

Medication	Part B Coverage	Part D Coverage
Methadone	Yes (enrolled OTP only)	No
Buprenorphine / Suboxone	Yes (OTP or doctor’s office)	Yes (take-home prescription)
Naltrexone / Vivitrol	Yes (injectable, clinical setting)	Yes (oral form only)

What Does MAT Through Medicare Actually Cost?

The cost of MAT under Medicare depends on which part of the program covers your care, and in many cases the out-of-pocket costs are lower than people expect.

• Original Medicare (Part B): If you receive MAT through a Medicare-enrolled OTP, there is no copay after your annual Part B deductible ($283 in 2026). [2] Once you’ve met the deductible for the year, your weekly bundled OTP services, including medication, counseling, and drug testing, cost nothing out of pocket. If you see a physician outside of an OTP for buprenorphine or naltrexone under Part B, standard cost-sharing applies: typically 20% of the Medicare-approved amount after the deductible.
• Medicare Part D: If you take buprenorphine or naltrexone as a take-home prescription, your cost depends on your specific plan’s formulary and tier structure. Most plans cover both medications, but copays vary.
• Medicare Advantage (Part C): Medicare Advantage plans are required to cover all OUD treatment services that Original Medicare covers, but they operate through provider networks and may require prior authorization. Confirming that your specific OTP or prescribing provider is in-network before beginning treatment helps prevent unexpected costs.
• Medicare and Medicaid (dual eligibility): Many people who qualify for Medicare also qualify for Medicaid, particularly those with low incomes or disabilities. Maryland Medicaid covers MAT, including both methadone and buprenorphine for OUD, [3] and for dual-eligible patients, Medicaid typically covers the costs that Medicare doesn’t, which in practice often means no out-of-pocket cost at all for treatment services.

How to Find a Rehab That Accepts Medicare

Not every addiction treatment program accepts Medicare, and not all that do are enrolled as Medicare-certified OTPs. The questions below can help you evaluate any program before committing:

Question to Ask	Why It Matters
Is this program enrolled as a Medicare-certified OTP?	Only enrolled OTPs can dispense methadone for OUD under Part B.
Is this program SAMHSA-certified and accredited?	SAMHSA certification is a federal requirement for OTPs; additional accreditation (such as CARF) reflects further quality standards.
Does the program accept your specific Medicare Advantage plan?	If you have a Medicare Advantage plan, confirming in-network status before your first visit prevents surprise costs.
Does the program also accept Medicaid?	If you have dual coverage, choosing a program that accepts both maximizes your benefits and minimizes out-of-pocket costs.
What does the intake process look like?	A good program will walk you through insurance verification before or at your first appointment, so you’re clear on costs from the start.

The Caring Clinics operates six outpatient MAT clinics across the Baltimore area, accepting Medicare Part B, multiple Medicare Advantage plans (including Aetna, Johns Hopkins, Kaiser, and United Healthcare), and Medicaid. All locations offer both methadone and buprenorphine, and the intake team can verify your specific coverage before your first visit.

Frequently Asked Questions

Does Medicare cover methadone take-home doses?

Methadone take-home eligibility is determined on an individual basis by your OTP’s clinical team, based on federal guidelines and your progress in treatment. If you have questions about what to expect, the program you’re working with can walk you through the criteria that apply to your situation.

Can I use Medicare at an outpatient MAT clinic, or only inpatient?

Medicare Part B covers outpatient MAT, including through OTPs, which is where the vast majority of long-term MAT care takes place. You do not need to be hospitalized to use your Medicare benefits for addiction treatment.

What if I have Medicare Advantage instead of Original Medicare?

Medicare Advantage plans are required by law to cover everything Original Medicare covers for OUD treatment. However, they may require you to use in-network providers and may have prior authorization requirements. Contacting your plan directly to confirm which OTPs are covered is the best first step.

Does Medicare cover counseling along with MAT medications?

Yes. Under the Part B OTP bundled benefit, counseling, therapy, and drug testing are all covered alongside medication as part of a single weekly benefit, reflecting the understanding that effective addiction treatment addresses the whole person, not just physical dependence.

Does Medicaid cover addiction treatment?

Yes. Maryland Medicaid covers MAT for opioid use disorder, including both methadone and buprenorphine, as part of its substance use disorder benefits. [3] If you’re unsure whether you qualify for Medicaid, your treatment program’s intake team can often help you check eligibility.

Getting Help Shouldn’t Be a Financial Guessing Game

Medicare covers MAT more thoroughly than many people realize, and for a significant number of patients, particularly those with both Medicare and Medicaid, the out-of-pocket cost is close to nothing. What matters most is connecting with a program that’s enrolled in Medicare, accepts your specific plan, and provides the kind of care oriented toward long-term recovery.

If you’re in the Baltimore area and want to know exactly what your Medicare or Medicaid plan covers, call our team at (443) 313-8475. We’ll walk you through your benefits and answer any questions before your first visit.

Last updated: October 2026

Sources

[1] Medicaid.gov. Substance Use Disorder Prevention that Promotes Opioid Recovery and Treatment for Patients and Communities (SUPPORT) Act. https://www.medicaid.gov/medicaid/benefits/behavioral-health-services/substance-use-disorder-prevention-promotes-opioid-recovery-and-treatment-for-patients-and-communities-support-act-section-1003

[2] Centers for Medicare & Medicaid Services. 2026 Medicare Parts A & B Premiums and Deductibles. https://www.cms.gov/newsroom/fact-sheets/2026-medicare-parts-b-premiums-deductibles

[3] MACPAC. Access to Medications for Opioid Use Disorder in Medicaid, June 2025. https://www.macpac.gov/wp-content/uploads/2025/06/MACPAC_June-2025-Chapter-3.pdf