Official CMS data
Medicare Plan Lookup builds its 2026 plan records from public data published by the Centers for Medicare & Medicaid Services (CMS). The site normalizes those records into a faster plan-code lookup format while preserving the source meaning as closely as possible.
CMS PBP Benefits Data
Plan identity and medical benefit fields are derived from the CMS Plan Benefit Package (PBP) Benefits 2026 JSON release. This dataset is used for items such as inpatient hospital cost sharing, ambulance, emergency room, and home health when those fields are available for the plan.
CMS Medicare Landscape Data
Public Medicare Landscape data is used to cross-check plan identity and selected fields such as premium and maximum out-of-pocket information where the source provides comparable values.
How the importer handles missing information
A missing field is not automatically treated as a zero-dollar benefit. When the CMS export does not clearly report a value, the site may show wording such as “Not reported,” “Not separately reported,” or “Verify in plan documents” instead of inventing a cost.
Standalone Prescription Drug Plans are also kept distinct from medical plans. A PDP record can identify prescription drug coverage without implying hospital, ambulance, emergency room, or other medical benefits.
Normalization and validation
During the production build, the source records are normalized by contract, plan, and segment code. Automated checks are used to catch duplicate plan codes, malformed records, inconsistent source matches, and arithmetic errors in calculated inpatient copay totals before the site is deployed.
CMS datasets can be revised, and carrier documents can contain details that are not represented in a public data export. Current official plan documents control when there is a difference.
What to verify before relying on a result
- Confirm the contract, plan, and segment code.
- Confirm the benefit applies to the relevant network and service setting.
- Review the current Summary of Benefits or Evidence of Coverage for conditions, exclusions, and exceptions.
- Confirm eligibility, enrollment status, and service-area requirements through appropriate official channels.