AmTrust at a glance
| Legal name | AmTrust Financial Services, Inc. |
|---|---|
| Also known as | AmTrust Financial, AmTrust North America |
| Category | Workers' compensation |
| Parent organization | AmTrust Financial Services |
| Claims payer ID | No single all-product identifier established in this registry; see source findings and verify the member product and transaction separately |
| Eligibility (270/271) payer ID | No single all-product identifier established in this registry; see source findings and verify the member product and transaction separately |
| ERA (835) payer ID | No single all-product identifier established in this registry; see source findings and verify the member product and transaction separately. Clearinghouse-specific: This registry has not established one national ERA payer ID for AmTrust. ERA enrollment and 835 routing are clearinghouse- and product-specific; verify in the payer portal or clearinghouse payer list before enrollment. |
| NAIC company code | Not established in this registry |
| States covered | Nationwide (50 states) |
| Provider resource entry point | https://www.amtrustfinancial.com |
| Provider phone | This registry has not established one provider phone number for AmTrust. A universal AmTrust provider-service number has not been established. Use the assigned claims adjuster and the applicable jurisdiction or claims kit; the former 1-800-440-0557 was withdrawn rather than presented as verified provider support. |
Always verify claims-routing details against the member ID card and the payer's current EDI companion guide before submission.
Timely filing & appeals for AmTrust
A national AmTrust medical-bill filing period is not established. The former 365-day default is withdrawn pending review of the state workers-compensation rules, claim administrator and provider agreement; this does not mean no deadline applies.
| Submission type | Window |
|---|---|
| Initial claim reference | Jurisdiction, claim and contract specific |
| Out-of-network initial claim | Verify the member's plan and applicable out-of-network rules |
| Secondary / coordination of benefits | Verify the allowed window and start event; a primary EOB does not automatically restart filing |
| Corrected claim | Verify correction instructions; do not substitute an appeal deadline |
| Reconsideration / appeal | Use the applicable denial or decision notice and the process below |
This registry has not established a payer-specific appeal ladder for AmTrust. Use the denial notice, plan document, provider agreement, or jurisdictional rule to assign the correct route and deadline. Missing registry evidence does not mean appeal rights are unavailable.
Source: AmTrust provider policy. Always confirm before disputing a TFL denial — payer policies are versioned and product-specific.
Prior authorization with AmTrust
Decision deadlines depend on the product, service and urgency. CMS-0057-F generally starts its decision-timeframe requirements in 2026 for Medicare Advantage, Medicaid and CHIP payers subject to the rule: seven calendar days for standard requests and 72 hours for expedited requests. Those requirements exclude drug authorizations and QHP issuers on the federally facilitated exchanges. Other plans, state rules and permitted extensions can differ. Check the applicable policy; a decision deadline is not a guarantee of approval.
CMS-0057-F decision-timeframe requirements and exclusions
Verify AmTrust electronic claims (837), eligibility (270/271), remittance (835) and authorization (278) separately for the member product and clearinghouse. Registry flags and routing references are not current transaction-complete approval. Confirm the companion guide, enrollment and applicable source findings below. A blank or unverified field does not establish that the transaction is unavailable. Authorization requirements and submission channels depend on the product, service and delegated reviewer. Verify the applicable policy before scheduling; a portal listing is not proof of X12 278 connectivity.
This registry does not provide a current prior-authorization code list for AmTrust. Start with the provider resources or the policy documents below, then confirm the applicable product, service and effective date. A resource link does not establish that a live code-lookup tool is available.
Top denial reasons for AmTrust
Per-payer denial benchmarks publish here once the QuickIntell anonymized ETL pipeline ingests sufficient AmTrust volume. Until then, see the broader CARC reference for industry-wide remediation guides.
Electronic claims, eligibility & ERA
| Transaction | Registry indication — not verification | Routing reference |
|---|---|---|
| 837P / 837I claims | Listed in registry; verify current scope | No single all-product identifier established in this registry; see source findings and verify the member product and transaction separately |
| 270 / 271 eligibility | Not established; verify separately | No single all-product identifier established in this registry; see source findings and verify the member product and transaction separately |
| 278 prior authorization | Not established; verify separately | Verify X12 278 routing separately |
| 835 ERA | Verify support and enrollment separately | No single all-product identifier established in this registry; see source findings and verify the member product and transaction separately. Clearinghouse-specific: This registry has not established one national ERA payer ID for AmTrust. ERA enrollment and 835 routing are clearinghouse- and product-specific; verify in the payer portal or clearinghouse payer list before enrollment. |
Payer IDs vary by clearinghouse — confirm against your clearinghouse payer list (Availity, Change Healthcare/Optum, Waystar) before configuring submitter routing.
Source checks and remaining limits
The latest partial comparison is dated . Retained earlier findings keep their original dates below. This is a partial source check, not a whole-page, clinical or legal review. It does not refresh the legacy review date above.
portal_url, timely_filing_days, provider_phone
Source comparison: 2026-09-18
The official claims page distinguishes reporting, assigned-adjuster lookup and state claims resources. It does not substantiate the stored 365-day national medical-bill filing default or 1-800-440-0557 as a universal provider-service number. Neither value was disproved solely by its absence. The unsupported universal provider-phone representation was withdrawn; use the assigned adjuster and jurisdiction-specific claims resources.
Primary source for portal_url, timely_filing_days, provider_phone
Not checked in this pass: All fields outside the specifically scoped findings, including legal-entity/NAIC identifiers, current enrollment and geographic coverage; Product-complete initial, corrected, secondary and appeal rules; applicable contracts and exceptions; Transaction-specific payer IDs, ERA enrollment and X12 278 unless explicitly established above; Prior-authorization code samples and current clinical criteria; QuickIntell capability/outcome claims and historical DataForSEO demand values; Accountable whole-record editorial approval (not supplied).
Evaluate QuickIntell workflow fit for AmTrust
These module references are evaluation starting points, not evidence of a validated connection, supported transaction or customer deployment. Confirm the actual member plan, data access and product scope first.
- QuickRCM
Evaluate claim preparation, follow-up and denial worklists for AmTrust; verify the actual plan rules and available connections before implementation.
- QuickAuth
Assess authorization-packet and status workflows for AmTrust; confirm product, service, delegated reviewer and permitted submission channels.
Frequently asked questions about AmTrust
Where is the AmTrust provider portal?
Use https://www.amtrustfinancial.com as a starting point for AmTrust provider resources. This link may open a directory or contact page rather than a transaction portal. Select the applicable product and administrator, then verify the available functions, enrollment and access requirements. QuickIntell is not the official payer portal.
What is the timely filing limit for AmTrust?
A national AmTrust medical-bill filing period is not established. The former 365-day default is withdrawn pending review of the state workers-compensation rules, claim administrator and provider agreement; this does not mean no deadline applies.
Does AmTrust publish a single claims payer ID?
This registry has not established one all-product claims payer ID for AmTrust. See the source findings for transaction-specific references. Look up the correct ID for the member's plan and transaction in your clearinghouse directory and verify against the member ID card before submission.
Does AmTrust accept electronic claims?
Verify AmTrust electronic claims (837), eligibility (270/271), remittance (835) and authorization (278) separately for the member product and clearinghouse. Registry flags and routing references are not current transaction-complete approval. Confirm the companion guide, enrollment and applicable source findings below. A blank or unverified field does not establish that the transaction is unavailable.
How do I appeal a AmTrust denial?
This registry has not established a payer-specific appeal ladder for AmTrust. Use the denial notice, plan document, provider agreement, or jurisdictional rule to assign the correct route and deadline. Missing registry evidence does not mean appeal rights are unavailable.
How long do AmTrust prior authorization approvals take?
Decision deadlines depend on the product, service and urgency. CMS-0057-F generally starts its decision-timeframe requirements in 2026 for Medicare Advantage, Medicaid and CHIP payers subject to the rule: seven calendar days for standard requests and 72 hours for expedited requests. Those requirements exclude drug authorizations and QHP issuers on the federally facilitated exchanges. Other plans, state rules and permitted extensions can differ. Check the applicable policy; a decision deadline is not a guarantee of approval.
How do providers contact AmTrust?
This registry has not established one provider phone number for AmTrust. A universal AmTrust provider-service number has not been established. Use the assigned claims adjuster and the applicable jurisdiction or claims kit; the former 1-800-440-0557 was withdrawn rather than presented as verified provider support. Use https://www.amtrustfinancial.com as a starting point for AmTrust provider resources. This link may open a directory or contact page rather than a transaction portal. Select the applicable product and administrator, then verify the available functions, enrollment and access requirements. QuickIntell is not the official payer portal.
Automate workflows around AmTrust requirements
Connect eligibility, prior authorization, pre-submission claim checks, and remittance routing in one governed workflow. Payer and plan configuration is confirmed during implementation.
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 AmTrust's current published documents before submission. CPT® is a registered trademark of the American Medical Association.