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| Payer Name | Payer ID | Type | Services | |
|---|---|---|---|---|
| MD Medicare Part A | 12301 | medicare | UB04 ERA Eligibility Attachments | More Info |
| MD Medicare Part B | 12302 | medicare | 1500 ERA Eligibility Attachments | More Info |
| ME BCBS Institutional | 00180 | bcbs | UB04 ERA Eligibility Attachments | More Info |
| ME BCBS Professional | 00680 | bcbs | 1500 ERA Eligibility Attachments | More Info |
| ME Medicare Part A - HHH | 14011 | medicare | UB04 ERA Eligibility Attachments | More Info |
| ME Medicare Part B | 14112 | medicare | 1500 ERA Eligibility Attachments | More Info |
| Meadowbrook Insurance Group | J1478 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Meadowood Resort LLC - CORVEL | J3814 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Mechanical Contractors Workers' Compensation Self-Insurance Group - CORVEL | J3685 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Medical Outcome Indicators | J4198 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Medicare J5 National Part A | 05901 | medicare | UB04 ERA Eligibility Attachments | More Info |
| Medline Industries, LP - CORVEL | J4707 | workerscomp | UB04 1500 ERA Attachments | More Info |
| MEDRISK | J1956 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Meijer Stores | J1930 | workerscomp | UB04 1500 ERA Attachments | More Info |
| MEMIC Casualty Company - CORVEL | 01047 | workerscomp | UB04 1500 ERA Attachments | More Info |
| MEMIC Indemnity Company | 11030 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Memorial Hermann TPA | J3781 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Mendota Insurance Company | 33650 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Merchants Insurance | J4008 | workerscomp | UB04 1500 Attachments | More Info |
| Merchants Insurance Group | C1095 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Mercury General Corporation | J2277 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Mercury Insurance Services | C1087 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Merge-Risk Mgmt IPA School District | J2302 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Meridian Health Plan Michigan Complete | MHPMI | commercial | UB04 1500 ERA Attachments | More Info |
| MERIDIAN MANAGEMENT SERVICES LLC - CORVEL | J2379 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Merieux NutriSciences Corporation - CORVEL | J4622 | workerscomp | 1500 ERA Attachments | More Info |
| Metis Services | J3857 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Metro North (New York MTA) - CORVEL | J4186 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Metropolitan Council | J1355 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Metropolitan Transit Authority of Harris County | J1238 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Mettler-Toledo (except ND, WA, WY) - CORVEL | J3315 | workerscomp | UB04 1500 ERA Attachments | More Info |
| MI Medicare Part A | 08201 | medicare | UB04 ERA Attachments | More Info |
| MI Medicare Part B | 08202 | medicare | 1500 ERA Eligibility Attachments | More Info |
| Miami-Dade County (Fl) - CORVEL | J3329 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Michael Kors | J2280 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Michigan Commercial Insurance Mutual (MCIM) | J4487 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Michigan Millers Mutual | J1988 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Mid South Wire - CORVEL | J4340 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Middle Tennessee Medical Center | J3779 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Middlesex county Municipal Joint Insurance Fund | J4533 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Midwest Drywall (Except CA, NM, NV) | J1119 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Midwest Family Advantage Insurance Co - CORVEL | J3748 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Midwest Family Mutual | C1051 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Midwest Family Mutual Insurance Co (Work Comp Only) | J1685 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Midwest Insurance | 10895 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Midwestern Insurance Alliance | J4243 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Millard Refrigerated | J1482 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Miller Grove ISD | J3947 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Miller’s Ale House, Inc. | J4137 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Minneapolis Public School - CORVEL | J2890 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Minutemen OhioComp | J4414 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Mississippi Department Of Corrections - CORVEL | J3328 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Mississippi Department of Public Safety | J2371 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Mississippi Department of Transportation - CORVEL | J2372 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Mississippi School Boards WC Trust - CORVEL | J2373 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Mississippi Valley Insurance Cooperative (MISSVIC) | J4464 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Missouri Employers Mutual | J3815 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Missouri Rural Services Work Comp Insured Trust (MRSWCIT) (MO only) | J4315 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Mister Car Wash, Inc. - CORVEL | J4653 | UB04 1500 ERA Attachments | More Info | |
| Mitchell Energy & Devel | J1085 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Mitsui Sumitomo Insurance Group - Toyota Claims Only | J1692 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Mitsui Sumitomo Insurance USA Inc. - Toyota Claim Only | J1694 | workerscomp | UB04 1500 ERA Attachments | More Info |
| MMIC | J1622 | workerscomp | UB04 1500 ERA Attachments | More Info |
| MN Blue Medicare Advantage | 00722 | commercial | UB04 1500 ERA Attachments | More Info |
| MN Insurance Guarantee Association | J2094 | workerscomp | UB04 1500 ERA Attachments | More Info |
| MN Medicare Part A | 06201 | medicare | UB04 ERA Eligibility Attachments | More Info |
| MN Medicare Part B | 06202 | medicare | 1500 ERA Eligibility Attachments | More Info |
| MN-Department of Labor | J1436 | workerscomp | UB04 1500 ERA Attachments | More Info |
| MO BCBS | 00241 | bcbs | UB04 1500 ERA Eligibility Attachments | More Info |
| MO Medicare Part A | 05301 | medicare | UB04 ERA Eligibility Attachments | More Info |
| MO Medicare Part B | 05302 | medicare | 1500 ERA Eligibility Attachments | More Info |
| Mobilitas Insurance Company | J4092 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Monroe Capital Holdings, LLC - CORVEL | J4630 | workerscomp | 1500 ERA Attachments | More Info |
| Monroe II-Orleans BOCES | J4173 | workerscomp | 1500 ERA Attachments | More Info |
| Monrovia Unified School District (ATHENS) | J3303 | UB04 1500 ERA Attachments | More Info | |
| Montana Association of Counties | J4001 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Montana State Fund - WC | J2893 | workerscomp | UB04 1500 Attachments | More Info |
| Monterey Bay Area Self Insurance Authority | J2219 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Monterey Mushroom Inc. | J4489 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Montgomery | J1424 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Montgomery County Self-Insurance Program (MD) | J1890 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Montgomery County Texas | A0179 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Monument Administrators - Cornerstone Comp | J1530 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Morongo Basin Transit Authority (CA) | J1651 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Morris Material Handling | J1086 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Morrison Health Care, Inc. | J1087 | workerscomp | UB04 1500 ERA Attachments | More Info |
| MOUNT SINAI MEDICAL CENTER OF FLORIDA, INC. | J4522 | workerscomp | UB04 1500 ERA Attachments | More Info |
| MS Medicare Part A | 07301 | medicare | UB04 ERA Eligibility Attachments | More Info |
| MS Medicare Part B | 00512 | medicare | 1500 ERA Eligibility Attachments | More Info |
| MT Medicare Part A | 03201 | medicare | UB04 ERA Eligibility Attachments | More Info |
| MT Medicare Part B | 03001 | medicare | 1500 ERA Eligibility Attachments | More Info |
| Mt. Sinai Hospital - Ex-Medical | J3795 | workerscomp | UB04 1500 ERA Attachments | More Info |
| MTA - Headquarters (New York MTA) - CORVEL | J4187 | workerscomp | UB04 1500 ERA Attachments | More Info |
| MTA Bridges & Tunnels (New York MTA) - CORVEL | J4188 | workerscomp | UB04 1500 ERA Attachments | More Info |
| MTA Bus (New York MTA) | J4189 | workerscomp | UB04 1500 ERA Attachments | More Info |
| MTS | J1641 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Multnomah County (OR) - CORVEL | J4044 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Munford, Inc. | J1088 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Municipal Pooling Authority | J2141 | workerscomp | UB04 1500 ERA Attachments | More Info |
| Municipal Risk Management, Inc | J4569 | workerscomp | UB04 1500 ERA Attachments | More Info |