obstetrics and gynecology

chicago, il

“We are a large OB/GYN private practice in a University setting. We have used ML Billing for over 3 years. The transparency, and thoroughness of the billing process is outstanding. We can attest to the integrity of ML, and to their commitment to our financial success in a difficult revenue cycle management environment.”

mental health center/psychiatry


“We have been working with ML Medical Billing since our practice opened. With our enormous growth over the past several years, it would seem difficult to be able to grow along with us. However, ML has been flexible, accommodating and has been successful in handling all challenges. Adam has been instrumental in creating systems for transparency, ease of operation and successful claim processing and collections. His warm personality makes us feel like we are his only customer, and his knowledgeable, friendly and dedicated staff has made our job much easier. Our liaison, Gail is intelligent, kind, and will work until the job is done; not a day goes by that I don’t appreciate our relationship.”

orthopedic surgeon


“ML Billing has drastically changed the way we do medical billing. It is like having a billing department in-house.”

“Best billing service that I've used. Attentive to detail and always available.”

general and bariatric surgeon

Santa Monica, CA

hematology and medical oncology


“ML Medical Billing completely simplifies the process of medical billing. Top notch!”

internal medicine


“We at SWCC are happy that we switched to ML billing. They are dependable and easy to reach. Our revenues since switching have improved and we gladly endorse them.”

“In summary we have been very pleased with ML Billing and would highly recommend”

surgical oncology, breast surgery


“Northwestern Surgical Associates has been using ML Billing for about 2 1/2 years. The transition from our former billing service was relatively easy and seamless because ML Billing took care of the details of notifying the various insurance companies including Medicare and they tracked these changes to assure they were completed in a timely fashion. They completed most of the multitude of forms for us.

Once we were "up and running", ML Billing provided us with timely monthly reports which were very detailed but they also summarized the collection data in a clear and concise manner. The reports are much more intuitive than those of our prior billing service where the reports were confusing and gave us useless data and summaries which indicated they did not understand how medical billing and physicians offices actually worked.

The number of accounts which needed to be sent to collections dropped significantly-a testament to their diligence in managing patient accounts.

When a problem does arise ML Billing (and especially Chris Maryniuk) is very responsive and reliable. He took ownership of any issue and followed through to the end.

In summary we have been very pleased with ML Billing and would highly recommend.”



“My experience with ML Billing began in 2012, working as the Office Manager for a Cardiologist, in Fort Pierce Florida. Adam Millstein, Vice President of ML Billing acquired the Internal Medicine part of our billing office, at that time the Cardiologist continued to utilize our employees in billing. As time progressed, the billing was not going in the direction the Physician wanted. I began to look around for a billing company, when I received a phone call from Mr. Millstein.

The internal medicine physician was completely happy with his billing, so I and our nurse met with Mr. Millstein. Within the hour of our meeting, he was able to navigate throughout the systems with no problem. Many questions were asked of him and he answered the questions to our satisfaction. We discussed in depth, the importance of what the Physician was expecting from out sourcing his billing. Adam Millstein himself was very personable, understanding of our needs and goals, and had that essential characteristic about him, which we felt very comfortable with. I, as the office manager, felt we had made a wise choice and knew that there was nothing to be concerned about.

It has been more than a year using ML Billing. The staff & Adam went above and beyond with a large clean up of various billing issues and AR. We have been and still are completely satisfied with the service and the staff. It feels more like a friendship than strictly a business relationship.”

“Your handling of my account has given me a new found sense of security and has taken a huge burden off of my shoulders”

plastic and reconstructive surgery


“When I started practice, Chris M. and Ariel W. guided me through the set up process and helped me navigate credentialing with insurance companies.

Now, ML Billing is my partner and tirelessly tracks down payments and denials. I could not run my practice without their help, highly recommend!”

“Our company has been working with M.L. Medical Billing for over 5 years.”

speech, occupational and developmental therapy group


“Our company has been working with M.L. Medical Billing for over 5 years. Chris Maryniuk and his team continue to provide us with top notch customer service and prompt attention to our billing process. He was able to quickly learn our niche market and recoup years of outstanding funds. By working with M.L. Medical Billing, we have been able to streamline our internal process and allow our therapy staff to focus their energy primarily on patient care.”

head and neck surgeon


“I recently made a transition from a “Group Practice” with in-house billing staff to a “Solo practice” outsourcing my billing to M.L. Medical Billing, Inc.

In the past 8 months my experience with M.L. Billing has been exemplary with attentive, courteous, available and accountable staff, speedy collection and very reasonable billing fees relative to the marketplace and the quality of their work.

The efficiency of collections has improved significantly when compared with “In-house Billing”.

I unconditionally recommend M.L. Billing and particularly their officer, Ms. Ariel Weeks. Ariel has been extremely attentive and pleasant to work with.

Having M.L. Billing at your side is like having a full staff of Billers without having them physically present at your office.

Most importantly, in over 8 months of experience, I have not had a single complaint from any patient regarding how their billing question(s) was handled.”

reconstructive surgery


“I have been very satisfied with the work that you have done for me over the years and have recommended your services to others.”

orthopedic surgeon


“Honesty, persistence and top-notch customer service are my top requirements for a billing service. ML has excelled consistently for the five years I've worked with them, even when tackling recent challenges such as out-of-network billing and the mass confusion resulting from the insurance exchange.”

plastic surgery


“ML Billing came highly recommended by another surgeon’s office and we have not been disappointed. Quite the contrary. Chris Maryniuk is incredibly efficient, never a delay, accessible, knowledgeable and helpful. ML Billing is like having an inside billing department.”



“As the President of a 6 psychiatrists group I had the pleasure of working with ML Billing company and Mr. Chris Maryniuk, since the fall of 2006-2011, and subsequently continued my association with them as an independent physician. During this time I found them to be professional, and responsive to the needs of our group.

Their owner Chris was always available to me to answer questions and sent detailed periodic reports of our patients account status. I found the staff friendly and pleasant to work with.

I would highly recommend them to any physician in need of such services.”

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