Payer Directory

How to check Medicare eligibility

A portal or phone check takes a front-desk staffer 10–15 minutes per patient. A real-time 270/271 check returns Part A & B status, deductibles, QMB status, and Medicare Advantage enrollment in seconds.

  • Payer ID CMS
  • Real-time 270/271
  • Enrollment required · hours
  • Medicare
  • Response verified July 2026

Three ways to verify Medicare coverage

  1. Payer portal — free, but one patient at a time and 10–15 minutes each with logins.
  2. Phone (IVR) — hold times vary; no written record for the chart.
The third way

Automated 270/271 check

Full benefit detail in seconds, batched for your whole schedule — not one patient at a time.

From $0.50 per check, pay-as-you-go. A one-time enrollment comes first.

Payer facts

Medicare at a glance

What billers need before running a check.

  • Payer ID

    CMSAlso known as 10001, CMSMED, MAPMC, MEDICARE

  • Real-time eligibility

    After enrollmentA one-time enrollment is required before checks can run (about hours).

  • Coverage

    dental, medical, visionMedicare

  • Operating area

    Nationwide

  • Member ID

    MBIMedicare Beneficiary Identifier — required on every check. Lost card? An MBI lookup can find it.

  • Medicare Advantage

    DetectedThe response flags MA enrollment and names the plan to bill instead

  • Payer website

    www.cms.gov
A live check

What a live Medicare check returns

Documented from real 271 eligibility responses. This is the actual level of detail — not a marketing summary.

Eligibility response · Medicare (CMS)271 · 0.8s

Coverage

Medicare Part A (hospital, home health, hospice)ACTIVEsince 2019-01-01
Medicare Part B (medical, surgical, diagnostic)ACTIVEsince 2019-01-01
Part D pharmacy coverageACTIVEseparate payer listed
Entitlement reasonAge (OASI)

Cost sharing

Part B deductible remaining$0 · calendar year
Part A deductible remaining$0 · per episode
CoinsurancePer visit
Qualified Medicare Beneficiary (QMB)FLAGGEDpatient cannot be billed cost-sharing

Billing alerts

Medicare Advantage enrollmentDETECTEDHMO Medicare Risk — bill the MA plan
Coordination of benefitsEffective 2023-01-01
Routine dental · long-term careNOT COVERED
Sample response structure from a real-time check. Amounts and dates vary per patient; no real patient data is shown.

Why this matters: The two most expensive Medicare billing mistakes — billing Original Medicare when the patient has a Medicare Advantage plan, and billing cost-sharing to a QMB patient — are both visible in this response before the visit happens.

Transactions

Supported transactions

What can be exchanged electronically with Medicare today.

  • Eligibility (270/271)

    ENROLLMENT REQUIREDReal-time benefit and coverage checks

  • Claim status (276/277)

    NOT AVAILABLEWhere a submitted claim stands

  • Professional claims (837P)

    NOT AVAILABLEPhysician and outpatient claims

  • Institutional claims (837I)

    NOT AVAILABLEFacility claims

  • Dental claims (837D)

    NOT AVAILABLEDental claims

  • Remittance (835 ERA)

    NOT AVAILABLEElectronic remittance advice

  • Coordination of benefits

    NOT AVAILABLESecondary-payer routing

  • Claim attachments (275)

    NOT AVAILABLESupporting documentation
Compare

Portal vs. phone vs. automated

The same verification, three ways.

MeasurePayer portalPhone / IVRAutomated check
Time per patient10–15 min15–30 minSeconds
Cost per checkStaff time, one login per patient~$8.57 in staff time*from $0.50
Record for the chartScreenshotNoneFull audit trail
Whole-day scheduleOne at a timeOne at a timeBatched overnight

*A manual eligibility check costs a medical practice $8.57; an electronic one costs $2.00. Source: 2024 CAQH Index.

In production

What Medman does in practices today

  • 65%

    fewer denials at Valley Diabetes & Obesity

  • 90%

    of eligibility checks fully automated

  • $107–149K

    annual savings, small specialty practice

  • 24 mo

    in production

Questions

Frequently asked questions

What is the payer ID for Medicare?

Medicare uses payer ID CMS. It also appears as 10001, CMSMED, MAPMC, MEDICARE in some systems.

Does Medicare support real-time eligibility verification?

Yes. Medicare supports real-time 270/271 eligibility checks after a one-time enrollment that typically takes hours. Once enrolled, checks return in seconds.

How long does a Medicare eligibility check take?

A portal check takes 10–15 minutes of staff time per patient. An automated real-time check returns in seconds and can run for an entire day's schedule overnight.

Does a Medicare eligibility check show Medicare Advantage enrollment?

Yes — this is one of the most valuable fields in the response. If the patient is enrolled in a Medicare Advantage plan, the check flags it and identifies the plan that should be billed instead of Original Medicare, preventing an automatic denial.

What if the patient doesn't know their MBI?

An MBI lookup can retrieve the patient’s Medicare Beneficiary Identifier from their name, date of birth, and SSN — then the eligibility check runs normally.

Directory

More payers

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Run your first Medicare eligibility check

From $0.50 per check, pay-as-you-go. No annual contract, no implementation project.

How the eligibility agent worksSee pricing

Billing more than Medicare? — upload it and see which of your payers run automatically.