(978) 772-7895

Welcome to Custom Medical Billing!

We are  your trusted partner for streamlined medical practice since 1996. We capture more of every hard earned dollar than other billing companies.

Delegate Your Billing to Custom Medical Billing for Enhanced Physician Freedom!

Experience the peace of mind that comes with entrusting your billing to the female owned and operated business and LOCAL experts at Custom Medical Billing, and rekindle the joy of practicing medicine with confidence.

Our Services

Established in 1996, our goal has always been to help doctors to simplify and steamline the practice of medicine. Give your billing to Custom Medical Billing…the result; more freedom for you to spend time being a physician, doing what you do best, caring for patients.  We bill for all types of practices from solo practitioners to small and large group practices in multiple locations, including inpatient and nursing home and rehabilitations settings. Our billing professionals confidently bill for all specialties, with an emphasis on Internal Medicine, Primary Care, Mental Health , OB-GYN and Speech Pathology.

  • Comprehensive Billing Services
  • Custom practice management forms
  • Claims submission; (paper and electronic)
  • Payment tracking
  • Rebilling problem claims
  • Solving payment problems
  • Patient Liasison for billing questions
  • Coding consultation
  • Practice management consulation
  • Practice analysis


I have been using Custom Medical Billing for over 10 years. They have been a Godsend for our busy practice. Tricia, the owner and her staff give personal attention to all their clients. This means that if you have a problem with a billing related issue, you can call Tricia and she will get it taken care of! She and her staff are meticulous about checking each claim for time and code accuracy. If they catch a mistake they will contact the clinician for clarification or correction.

Every month Tricia sends out a packet of reports so you know everything about the insurance billing and payments for the month; how much was taken in, what is still owed, and what balances each client has, to name a few items. She also sends out logs to the clinician or group practice showing what dates and monies have come in for each client. This makes it so easy to track your insurance payments. She will also bill for copays if you like.

I can’t say enough good things about the services CMB offers, they even do the paperwork for credentialing my new clinicians! Having them take care of my billing has freed me up to do more of the things I love, like seeing clients.

Shari Bennett, LICSW, Owner and Director, Interactions Counseling & Intervention Center, Inc.

The staff at Custom Medical Billing has been such a valuable resource.  Their expertise has allowed me to focus on my own expertise as a provider. I have the freedom to pour my energy into my clients, and the security to know that all billing is done meticulously.  I highly recommend Custom Medical Billing for any medical billing needs.

Jeanne Deneault, LICSW

Custom Medical billing has been doing my billing since January of 2001. They are very professional and the service they offer is excellent. My aging has never been better. I wouldn’t hesitate to recommend them.

Shimon Segal, MD

We switched to Custom Medical Billing after years of frustration with a large billing company where our needs were not being met. With CMB, not only is our collection rate much better, but we feel like we are a priority. We receive personalized attention, timely answers to our questions, and useful reporting. We no longer have to constantly worry about our claims being paid. Also, the entire staff at CMB is always friendly, knowledgeable and helpful.

Hope Psychological Services
Lexington, MA

Contact Custom Medical Billing

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Providing personalized service with a small company feel and big company performance.

Custom Medical Billing

P.O. Box 700
Ayer, Massachusetts 01432