AmTrust North America, Inc.

Also known as AmTrust
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Contact Information
Name
AmTrust North America, Inc.
Type
TPA
daisyBill Payer ID
db97799
Hours of Operation
08:00 AM - 07:00 PM EDT
Telephone Numbers
Main
(888) 239-3909
Claim Inquiries
(888) 239-3909 x 3,3
Main
(888) 239-3909
Claim Inquiries
(888) 239-3909 x 3,3
Bill Review
Mitchell International
(888) 380-5616
CA Medical Provider Networks (MPNs)
Company Website

AmTrust NATIONAL DATA

2,159
Provider Count
19,937
Injury Count
102,857
Bill Count
94%
e-Bill %
3%
Duplicate Bill %
7
Avg Days To Pay

AmTrust CALIFORNIA DATA - EDI COMPLIANCE

Since October 2012, California law has mandated that claims administrators accept electronic medical bills (e-bills) and adhere to specific timeframes established by the Division of Workers’ Compensation (DWC) Medical Billing and Payment Guide. These timeframes govern the following Electronic Data Interchange (EDI) transactions:

  • 837 (e-bill) Receipt: The provider's initial submission of the electronic medical bill and subsequent Second Review appeals.

  • 277 Acknowledgement (ACK) Receipt: An electronic confirmation from the claims administrator indicating that the e-bill has been received and whether it has been accepted or rejected.​

  • 835 Explanation of Review (EOR) Receipt: A detailed electronic response from the claims administrator outlining the adjudication results of the e-bill, including payment details or reasons for denial.

By tracking this EDI data, daisyBill helps providers identify trends, resolve billing discrepancies, and maintain transparency in the workers’ comp electronic billing process.

837 e-Bill Sent

California law requires AmTrust to accept workers’ comp e-bills and Second Review appeals submitted electronically by providers. daisyBill transmits all bills and appeals using the X12 837 EDI standard, as mandated by DWC Rule 7.1.

When AmTrust fails to accept e-bills compliantly, daisyBill resorts to non-EDI methods (fax, email, or mail) to submit paper bills for processing.

The table below shows how often AmTrust properly accepts e-bills sent via the required X12 837 EDI standard and how often AmTrust's failure forces providers to submit paper bills.

95%
X837 Stats
X12 837 EDI
Original Bill
Second Review Appeal
Total
X12 837 EDI Compliant
837 Sent
46,208
95%
5,599
96%
51,807
95%
Yes
837 Not Accepted
2,434
5%
210
4%
2,644
5%
No

277 Acknowledgement (ACK) - Timeliness

California requires AmTrust to electronically send a 277 Acknowledgement (277 ACK) to the provider within two working days of receiving an e-bill. This notice confirms whether AmTrust accepted or rejected the e-bill for payment adjudication. If the 277 ACK indicates acceptance, it serves as proof that AmTrust received the e-bill for processing.

The table below shows how often AmTrust sends 277 ACK notices to daisyBill clients within the required two working days after receiving an e-bill.

100%
X277 Stats
X12 277 ACK Receipt
Original Bill
Second Review Appeal
Total
X12 277 Timeliness Compliant
277 Receipt Timely - 2 Working Days
46,197
100%
5,599
100%
51,796
100%
Yes
277 Receipt - 3+ Working Days
11
0%
0
0%
11
0%
No

277 Acknowledgement - Erroneous e-Bill Rejections

daisyBill tracks the following criteria from AmTrust 277 Acknowledgement (277 ACK) responses to e-bills:

  • 277 Accept: Confirms that the e-bill was accepted for payment adjudication.

  • 277 Reject: Indicates that the e-bill was rejected, with an associated STC Category and STC Code explaining the reason.

  • STC Invalid – Reject Second Review: An improper rejection of a Second Review appeal using invalid STC Category and/or STC Code.

  • STC Invalid – Reject Injury Claim Valid: An incorrect rejection of an e-bill where the claims administrator previously paid another bill associated with the same injury claim.

  • STC Invalid – Reject Category/Code: A rejection where the STC Category and/or STC Code provided is invalid or not allowed.

  • STC Invalid – Reject Prior Accept: An incorrect rejection of an e-bill that was previously accepted via an earlier 277 ACK.

These criteria provide detailed insight into how often AmTrust appropriately processes or improperly rejects e-bills and appeals.

90%
X277 Stc Stats
277 ACK STC Code
Original Bill
Second Review Appeal
Total
X12 277 STC Compliant
277 ACK Accept
41,146
89%
5,372
96%
46,518
90%
Yes
277 ACK Reject
4
0%
0
0%
4
0%
Yes
277 Reject Error - Invalid STC Category/Code
1,640
4%
0
0%
1,640
3%
No
277 Reject Error - Valid Injury Claim
1,560
3%
0
0%
1,560
3%
No
277 Reject Error - Prior ACK Accept Sent
1,858
4%
0
0%
1,858
4%
No
277 Reject Error - Improper Second Review / Appeal Rejection
0
0%
227
4%
227
0%
No

835 Explanation of Review (EOR) Receipt

An electronic Explanation of Review (EOR) is transmitted using the X12 835 EDI standard and provides details on the adjudication of an e-bill. DWC Rule 7.1 requires AmTrust to electronically send an Explanation of Review (EOR) to the provider using the X12 835 EDI standard.

  • For Original e-Bills, AmTrust must electronically send the EOR within 15 working days after receiving the e-bill.

  • For Second Review Appeals, AmTrust must electronically send the EOR within 14 calendar days after receiving the Second Review e-bill.

The table below shows how often AmTrust sends X12 835 EORs to daisyBill clients within the required timeframes.

81%
X835 Stats
X12 835 Receipt
Original Bill
Second Review Appeal
Total
X12 835 Compliant
835 Posted
35,525
86%
2,358
44%
37,883
81%
Yes
835 Balance Errors - Posted
0
0%
12
0%
12
0%
No
835 Late Receipt - Posted
1,779
4%
646
12%
2,425
5%
No
835 Missing
1,702
4%
2,167
40%
3,869
8%
No
835 Invalid - Unpostable
2,140
5%
189
4%
2,329
5%
No

AmTrust CALIFORNIA DATA - REIMBURSEMENT STATISTICS

CA Average Days to Pay

For each bill sent from daisyBill software to AmTrust, our technology tracks the count of business days it took AmTrust to process the bill.

For the listed California workers’ comp fee schedules, this table reflects the average count of business days from AmTrust’s receipt of a bill until the daisyBill client received an explanation of review (EOR) and payment from AmTrust.

* California requires claims administrators to pay e-bills for medical treatment within 15 working days of receipt of the e-bill.

California Workers' Comp Fee Schedule
Average Days to Pay
Medical *
8.0
Interpreter
8.2
Copy Service
6.9
Medical-Legal
6.4
Facility *
9.5

CA Official Medical Fee Schedule

The California Official Medical Fee Schedule (OMFS) establishes the reimbursement amounts due to providers for medical treatment furnished to injured workers. However, rather than reimbursing providers the reimbursement amounts due per the OMFS, AmTrust uses Preferred Provider Organizations (PPOs) to reduce the reimbursements paid to providers.

For AmTrust medical treatment bills, this table reflects the OMFS Reimbursement Due to daisyBill clients for medical treatment provided to injured workers. AmTrust Reimbursement Reduction reflects the amount AmTrust failed to pay daisyBill clients. The AmTrust Reduced Reimbursement reflects the reimbursement amount AmTrust ultimately reimbursed daisyBill providers.

79%
Official Medical Fee Schedule (OMFS)
OMFS Reimbursement Due
$6,578,063
100.0%
AmTrust Reimbursement Reduction
$1,364,044
20.7%
AmTrust Reduced Reimbursement
$5,214,019
79.3%

AmTrust CALIFORNIA DATA - PENALTY & INTEREST

If AmTrust fails to remit payment within mandated time frames, California law requires the claims administrator to “self-execute” Penalty and Interest payments directly to the provider. Often claims administrators fail to self-execute these Penalities and Interest (P&I).

Using e-billing data, daisyBill calculates the Total P&I Due to daisyBill clients and the amount of P&I AmTrust reported paying our clients.

The Penalty & Interest Balance Due displayed here is the amount AmTrust failed to self-execute to daisyBill clients as mandated by California law.

$1,244,909
Penalty and Interest Balance Due
Total Penalty & Interest Due*
$1,286,388
Self-Executed Penalty & Interest Paid
$41,478
Penalty & Interest Balance Due
$1,244,909
Bill Transmission Year
Bill Count
EOR Receipt Count
EOR Missing Count*
Payment Late Count
Penalty Due
Interest Due
Total P&I Due
2019
27,061
16,208
60%
10,853
40%
2,512
15%
$103,119
$73,707
$176,826
2020
29,229
16,842
58%
12,387
42%
2,833
17%
$136,612
$116,262
$252,873
2021
34,533
19,517
57%
15,016
43%
3,263
17%
$148,119
$110,698
$258,816
2022
37,866
29,169
77%
8,697
23%
2,694
9%
$133,350
$77,628
$210,978
2023
49,432
47,513
96%
1,919
4%
3,045
6%
$136,214
$70,605
$206,819
2024
72,914
69,060
95%
3,854
5%
3,220
5%
$104,019
$25,548
$129,567
2025
38,322
36,455
95%
1,867
5%
1,714
5%
$41,077
$9,430
$50,508
Total
289,357
234,764
81%
54,593
19%
19,281
8%
$802,509
$483,878
$1,286,388

Once a bill payment is 45 calendar days overdue, daisyBill calculates Penalty and Interest amounts owed. Total P&I Due may slightly overstate the amount owed by AmTrust in the instances where the underlying employer is a government employer, as California allows government employers 60 calendar days to timely reimburse workers' comp bills.

*EOR Missing Count reflects the instances where AmTrust failed to electronically send the provider an EOR, therefore, daisyBill could not calculate whether P&I is due for these e-bills where the EOR is missing. Data updates daily.

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