MCM South Medical Billing Service, LLC

MCM South Medical Billing Service handles the complete billing cycle for mental and behavioral health practices, from the benefits check before a patient's first session to the final payment posting. The company has operated as a dedicated mental health billing outsourcing provider since 2010, serving solo practitioners and group practices that bill psychotherapy and psychiatry codes. Practices that outsource billing to MCM South get a team whose entire back office exists to serve one specialty. The service covers six core functions: insurance benefits verification, clean claim submission, claim reconciliation, credentialing, appeals, and EAP billing. Before a patient is booked, MCM South confirms coverage and cost-share with the payer so the practice knows what to collect at the visit. Electronic claims go out coded to mental and behavioral health standards, payer responses are matched and posted, and any denial that comes back triggers an appeal. Credentialing is handled as a distinct service, enrolling providers with each payer before billing begins. Out-of-network claims, secondary claims, and EAP sessions are all billed alongside standard in-network work. The company works with psychotherapists and psychiatrists in both solo practices and medium-size groups. For psychiatrists, that means handling E/M visits and the add-on psychotherapy codes used for combined medication management and therapy sessions, not just standard psychotherapy codes. The model fits practices at different stages, whether a solo therapist just starting to accept insurance or a growing group adding providers. MCM South was founded in 2010 by Michael Williams, who spent seven years consulting for SimplePractice and working directly with the clearinghouse on billing issues. The company currently serves practices in ten states, including Georgia, Massachusetts, Connecticut, Texas, Florida, New York, Colorado, Tennessee, North Carolina, and Illinois, and has billed for practices across all 50 states over its history. English and Spanish support is available, and the team maintains a 783-term billing glossary written in plain language for practices that want to understand what is happening with their claims. Practices dealing with a denials backlog, a stalled credentialing file, or questions about moving away from self-billing can request a free quote or book a consultation directly on the MCM South website.