Blue Cross Blue Shield in New Jersey, Maryland and DC: Billing Guide
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Horizon Blue Cross Blue Shield of New Jersey (Horizon BCBSNJ) and CareFirst BlueCross BlueShield are the Blue plans for New Jersey, Maryland and Washington DC. They are separate companies with separate provider sites, so check the card and open the section that matches it. Virginia members outside Northern Virginia are on Anthem. The Blue Cross and Blue Shield Association (BCBSA) publishes a licensee map.
Checked 10/1/26.
Jump to: New Jersey · Maryland and DC.
New Jersey
Horizon Blue Cross Blue Shield of New Jersey is New Jersey's Blue plan. For payer IDs, claims routing and filing limits, go to Horizon's own provider pages, linked below.
| Blue company | Horizon Blue Cross Blue Shield of New Jersey |
|---|---|
| Provider site | horizonblue.com/providers |
| Claims submission and reimbursement | Horizon's Claims Submissions and Reimbursement policy pages |
| Telehealth | Horizon's Telemedicine and Telehealth Services reimbursement policy |
| State regulator | New Jersey Department of Banking and Insurance |
Maryland and DC
CareFirst BlueCross BlueShield is the shared business name of CareFirst of Maryland, Inc. and Group Hospitalization and Medical Services, Inc. (CareFirst provider manual, chapter 3). CareFirst says its legal entities, including CareFirst BlueChoice, Inc., are independent licensees of the Blue Cross and Blue Shield Association (October 2024 newsletter). It serves Maryland, Washington DC and Northern Virginia.
| Blue company | CareFirst BlueCross BlueShield; CareFirst BlueChoice |
|---|---|
| Provider site | provider.carefirst.com |
| Provider phone (eligibility and benefits you cannot get online) | 800-842-5975 |
| Behavioral health | Mental Health and Substance Use Disorder line, 800-245-7013 |
| Appeals (professional) | Mail Administrator, PO Box 14114, Lexington, KY 40512-4114 (October 2024 newsletter) |
| Credentialing | Complete CAQH ProView, then submit CareFirst's online authorization form. Credentialing inquiries 877-269-9593 or 410-872-3500 |
| State regulators | Maryland Insurance Administration; DC Department of Insurance, Securities and Banking; Virginia SCC Bureau of Insurance |
Payer ID, claims address and filing limit. Confirm these in the claims chapter of the CareFirst provider manual before you submit. The manual is in your CareFirst provider portal.
Frequently asked questions
Is CareFirst BlueChoice a separate company?
Yes. CareFirst BlueChoice, Inc. is a separate legal entity that operates under the CareFirst name. Check the member card to see which one applies.
How do I credential with CareFirst?
Complete your CAQH ProView profile first, then submit CareFirst's online authorization form. Credentialing inquiries go to 877-269-9593 or 410-872-3500.
Which Blue plan covers New Jersey?
Horizon Blue Cross Blue Shield of New Jersey. Use Horizon's provider site for claims and policy details.
How MCM South helps with CareFirst BCBS Maryland and DC, plus Horizon BCBSNJ
MCM South bills Blue plans for psychotherapists and psychiatrists in the states we serve. We verify benefits, submit claims electronically, follow up on denials and appeals, and handle credentialing. Get a free quote. If a CareFirst BCBS Maryland and DC, plus Horizon BCBSNJ claim is denied or credentialing stalls, we follow up for you.
MCM South currently serves practices in GA, MA, CT, TX, FL, NY, CO, TN, NC and IL, and has worked in all 50 states. If your state is not on that list, ask us. This page is operational guidance for billing, not legal advice. For real financial or legal exposure, talk to your attorney or compliance officer.
Related: Blue Cross by State · How Blue Cross Blue Shield Works · Billing Terms Glossary · CPT and E/M Code Guide · Who We Serve.
This is the MCM South guide to CareFirst BCBS Maryland and DC, plus Horizon BCBSNJ for therapists and psychiatrists: where claims go, how appeals work, and what to check first.
Want a billing team that handles this for you? MCM South bills for psychotherapists and psychiatrists. Get a free quote.