Medicare (Traditional) provider portal, phone and payer ID quick facts
| Provider portal | https://www.cms.gov/medicare |
|---|---|
| Provider phone | 1-800-633-4227 |
| Claims payer ID | Verify in clearinghouse payer list |
| Eligibility payer ID | Verify in clearinghouse payer list |
| ERA payer ID | Clearinghouse-specific |
| Timely filing | 365 days |
| Prior auth route | Provider portal or policy document |
| Last reviewed | 2026-04-23 |
- Medicare (Traditional) does not expose one verified national ERA payer ID in this registry. ERA enrollment and 835 routing are clearinghouse- and product-specific; verify in the payer portal or clearinghouse payer list before enrollment.
Medicare (Traditional) at a glance
| Legal name | Centers for Medicare & Medicaid Services — Original Medicare (FFS) |
|---|---|
| Also known as | Original Medicare, Medicare Fee-for-Service, Medicare FFS, Medicare Part A/B |
| Category | Government program |
| Parent organization | Centers for Medicare & Medicaid Services (CMS) |
| Claims payer ID | Not published |
| Eligibility (270/271) payer ID | Not published |
| ERA (835) payer ID | Clearinghouse-specific |
| NAIC company code | Not published |
| States covered | Nationwide (50 states) |
| Members covered | ~34 million members |
| Provider portal | https://www.cms.gov/medicare |
| Provider phone | 1-800-633-4227 |
Always verify claims-routing details against the member ID card and the payer's current EDI companion guide before submission.
Timely filing & appeals for Medicare (Traditional)
Medicare (Traditional)'s standard timely filing window for participating providers is 365 days from the date of service. Plan-specific products (Medicare Advantage, Medicaid, employer groups, secondary claims) may have shorter or longer windows — always confirm against the policy linked below before disputing a TFL denial.
| Submission type | Window |
|---|---|
| In-network initial claim | 365 days |
| Out-of-network initial claim | 365 days (verify per plan) |
| Secondary / coordination of benefits | 365 days from primary EOB |
| Corrected / appeal | 120 days from denial |
Appeal levels
- Level 1: Redetermination (MAC)File within 120 days
First-level appeal filed with the MAC within 120 days of the initial determination (42 CFR §405.942).
- Level 2: Reconsideration (QIC)File within 180 days
Reconsideration by a Qualified Independent Contractor within 180 days of the redetermination.
- Level 3: ALJ HearingFile within 60 days
Administrative Law Judge hearing for amounts in controversy meeting the annual threshold.
- Level 4: Medicare Appeals CouncilFile within 60 days
Review by the Medicare Appeals Council of the Departmental Appeals Board.
- Level 5: Federal District CourtFile within 60 days
Judicial review in federal district court for claims meeting the amount-in-controversy threshold.
Source: Medicare (Traditional) provider policy. Always confirm before disputing a TFL denial — payer policies are versioned and product-specific.
Prior authorization with Medicare (Traditional)
Medicare (Traditional) does not currently accept X12 278 prior-authorization transactions; submit via portal or fax. The procedures most commonly subject to prior authorization include advanced imaging, inpatient admissions, specialty pharmacy, and certain outpatient surgical procedures. Use the payer's authorization tool below to confirm requirements per CPT before scheduling a service.
Medicare (Traditional) maintains a live prior-authorization code lookup tool that supersedes any cached list. Use the provider portal or the policy documents below to confirm the current PA list before rendering a service.
Top denial reasons for Medicare (Traditional)
Per-payer denial benchmarks publish here once the QuickIntell anonymized ETL pipeline ingests sufficient Medicare (Traditional) volume. Until then, see the broader CARC reference for industry-wide remediation guides.
Electronic claims, eligibility & ERA
| Transaction | Supported | Payer ID |
|---|---|---|
| 837P / 837I claims | Yes | — |
| 270 / 271 eligibility | Yes | — |
| 278 prior authorization | No | — |
| 835 ERA | No | Clearinghouse-specific |
Payer IDs vary by clearinghouse — confirm against your clearinghouse payer list (Availity, Change Healthcare/Optum, Waystar) before configuring submitter routing.
QuickIntell coverage for Medicare (Traditional)
- QuickRCM
End-to-end claim lifecycle automation tuned to Medicare (Traditional)'s edits and adjudication patterns.
- QuickCode
Code-level scrubbing tuned to Medicare (Traditional)'s NCCI, modifier, and bundling edits before claim submission.
- QuickERA
Automated 835 ERA posting from Medicare (Traditional) with payment reconciliation and denial routing.
Frequently asked questions about Medicare (Traditional)
Where is the Medicare (Traditional) provider portal?
The Medicare (Traditional) provider portal is available at https://www.cms.gov/medicare. Use it for eligibility checks, claim status, prior authorization workflows, appeals, and payer-specific routing updates. QuickIntell links to the payer's provider-facing portal as a reference and is not the official payer portal.
What is the timely filing limit for Medicare (Traditional)?
Medicare (Traditional)'s standard timely filing limit for participating providers is 365 days from the date of service. Plan-specific products (Medicare Advantage, Medicaid managed care, employer groups) may have different windows — confirm against the payer's provider manual before disputing a TFL denial.
Does Medicare (Traditional) publish a single claims payer ID?
Medicare (Traditional) does not publish a single canonical claims payer ID — routing is plan- or jurisdiction-specific. Look up the correct ID per member in your clearinghouse directory (Availity, Change Healthcare/Optum, Waystar) and verify against the member ID card before submission.
Does Medicare (Traditional) accept electronic claims?
Yes — Medicare (Traditional) accepts ANSI X12 837P and 837I electronic claims through standard clearinghouses. Real-time eligibility (270/271) is supported and X12 278 prior authorization is not currently supported.
How do I appeal a Medicare (Traditional) denial?
Medicare (Traditional) uses a 5-level appeal process. Level 1 (Redetermination (MAC)) must be filed within 120 days of the denial. Each escalation level requires the prior decision letter and supporting clinical or coding documentation. See the appeal-levels block above for deadlines and process.
How long do Medicare (Traditional) prior authorization approvals take?
Medicare (Traditional)'s prior-authorization decision turnaround typically follows standard industry windows: 72 hours for urgent requests and up to 14 calendar days for non-urgent requests. Specialty drugs and high-cost imaging may extend further. Submit through the Medicare (Traditional) provider portal for the fastest turnaround.
What is the Medicare (Traditional) provider phone number?
Providers can reach Medicare (Traditional) at 1-800-633-4227 for claims status, eligibility verification, and authorization questions. Have the member ID, date of service, and tax ID ready before calling. Most operational tasks are faster through the provider portal at https://www.cms.gov/medicare.
Run cleaner claims to Medicare (Traditional) with QuickIntell
QuickAuth, QuickRCM, and QuickERA are validated against Medicare (Traditional)'s EDI behavior — eligibility, prior auth, claim scrubbing, and ERA posting all run on real payer rules.
Disclaimer
This page is operational reference for medical-billing professionals. It is not legal, clinical, or contractual advice. Payer policies change without notice — always verify against Medicare (Traditional)'s current published documents before submission. CPT® is a registered trademark of the American Medical Association.