Medicare Administrative Contractor
Private contractors that process Medicare Part A/B and DME claims and issue Local Coverage Determinations within their jurisdictions.
Definition
Medicare Administrative Contractors (MACs) are private companies CMS contracts with under the Medicare Modernization Act of 2003 to process Medicare fee-for-service claims, enroll providers, conduct medical review, and issue Local Coverage Determinations (LCDs). The country is divided into A/B MAC jurisdictions and four DME MAC jurisdictions. As of 2025 the principal A/B MACs include Noridian, Palmetto, Novitas, NGS, CGS, First Coast, and WPS.What this means in practice
Because each MAC issues its own LCDs, the same device can be covered in one jurisdiction and not another, a structural reality MedTech market-access teams must plan around. MolDX (run by Palmetto) is the most influential MAC sub-program for molecular diagnostics.Examples
- A MedTech company developing a novel surgical tool must submit its reimbursement claims to the specific MAC responsible for the geographic region where the procedure was performed, adhering to that MAC's particular billing guidelines.
- Before launching a new diagnostic test nationwide, a manufacturer discovered that different MACs had varying Local Coverage Determinations (LCDs), requiring a tailored market access strategy for each jurisdiction.
- A hospital billing department received a denial for a medical device claim because the documentation submitted did not meet the specific medical necessity criteria outlined in the LCD issued by their regional Medicare Administrative Contractor.
- •Assuming a national LCD where only jurisdictional LCDs exist.
- •Engaging only one MAC when a multi-MAC strategy is needed for national coverage.
Frequently asked questions
Related terms
Grouped by themeEditor's picks
· Hand-selected related conceptsLocal and National Coverage Determinations from Medicare.
Medicare coverage policies issued nationally (NCD) or by individual MAC contractors (LCD).
Medicare benefit category covering durable medical equipment, prosthetics, orthotics, and supplies, billed under HCPCS Level II codes through DME MACs.
A Medicare molecular diagnostics program, administered by Palmetto GBA and adopted by several Medicare Administrative Contractors, that technically assesses molecular tests and assigns Z-codes for claims processing and local coverage.
Reimbursement & Market Access
· From this learning pathSupplemental Medicare payment for inpatient use of qualifying new technologies.
Financial model that estimates the total cost consequences of adopting a new technology to a payer's budget over a defined horizon.
AMA-maintained codes that describe medical procedures and services.
AMA-maintained codes used to report medical procedures and services for billing.
Where this term appears across MedTech Terms.
- Reimbursement & Market AccessLesson 7 of 14
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Sources
3 sourcesEvery citation below opens the original document. Each is graded against our source-tier hierarchy so you can see what rests on binding law versus commentary.
- 1CMS, Medicare Administrative ContractorsTier 2 VerifiedCMScms.gov
- 242 USC 1395kk-1, Medicare Administrative ContractorsTier 1 VerifiedCornell LIIlaw.cornell.edu
- 3AdvaMed - Payment & CoverageTier 4 VerifiedAdvaMedadvamed.org
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