(818) 528-7411




“Having always done my own billing, it was scary giving it all to an outside vendor. I had known Nancy for years, and her professionalism and knowledge drew me to her company. I have never looked back. Her staff is friendly, prompt, and efficient. I was able to easily make their system "fit" into how I do things at my clinic. I am very happy with MOS, Inc. and would recommend them to anyone.”


Patty JS P.T., O.C.S. | Acton, CA



“Our business has been with MOS, Inc. for the past 8 years and we’ve been extremely happy with their services since the beginning. Transitioning from our original billing to their service was very smooth and they have continued to offer excellent service. Our account representative is extremely knowledgeable as she is always up to date with the latest Medicare and insurance regulations, and she is prompt in answering any questions or concerns that both the office and patients may have. The turnaround time for accounts receivable and collections remain very steady as they are constantly following up with insurance. I would highly recommend MOS, Inc. services to any practice interested in having their outpatient billing performed.“


Craig C, PT | Placentia, CA



"This is a testimonial regarding our amazing and positive experiences with MOS, Inc. My practice has been working with MOS, Inc. for our Pediatric Occupational and Physical Therapy insurance billing needs for approximately the last 5 years. The owner, Nancy Saccio and her staff (Nancy, Blanca, and Maribel) have been professional, supportive, efficient, educational and proactive in assisting our company in submitting our billing accurately, timely and improving our bottom line. They truly care about their clients no matter how small or large of a practice. I would highly recommend contracting with MOS, Inc. for any company’s therapy insurance billing needs.”


Charmayne R, PT, DSc. | Arcadia, CA



“Nancy and her team at MOS, Inc. have from the very beginning of our business with them been kind, patient, and professional. They work diligently to not only collect payments we are owed but also to keep accurate and thorough record of all aspects of billing. I would recommend MOS, Inc. to businesses look for a quality outsourced billing company.”


Caleb F., DPT | Turlock, CA



“It has been a pleasure working with you and your team at MOS, Inc. over the past 10 years or so. In the current medical reimbursement environment , MOS, Inc. has continually proven to be effective in optimizing our receivable flow. Both you and your staff are current in the law, consistently available and reliable. Maribell in particular has been the anchor in our relationship with MOS, Inc.. She is patient, knowledgeable and a pleasure to work with. In short, I would recommend MOS, Inc. to any clinician interested in quality outsource billing.”


Tom S., CSCS, RKC, PTA, ACE Certified Personal Trainer | Pasadena and Arcadia, CA



“I have been in private practice for over 30 years. We billed our own insurance and found it not to be effective. Medical Outsource Solutions is our third billing company and I know that they will be the one I use until I retire. MOS, Inc. has done an excellent job with our billing and collections and our accounts receivable reflects it. They provide us with excellent information in terms of changes in Medicare and insurance regulations. They are quick to respond to our inquiries as well. They have been an excellent partner and I am looking forward to continuing this relationship with Medical Outsource Solutions.”





“My practice has had the pleasure of working with MOS, Inc. for the past 5 years. Nancy and her team and highly professional, responsive, and knowledgeable. MOS, Inc. ensures clinics are well prepared for various new third party guidelines each year. They provide clearly detailed steps to ensure fluid transitions. I would highly recommend MOS, Inc. to any rehabilitation clinic.”


Manjiri D., PT, DPT, ATP | Long Beach, CA



“Medical Outsource Solutions, Inc. has been fantastic! Their staff is very knowledgeable, and always handle tasks in a timely manner. MOS, Inc. keeps us informed with changes to current billing policies that apply to us. They are very thorough and work their hardest to get claims paid out quickly. We would highly recommend Medical Outsource Solutions, Inc.”


Aide Q. | South San Francisco, CA



“MOS, Inc. Billing has been with me since opening my practice. With all the demands and difficulties with starting a new business, MOS, Inc. has always been there for me and my staff as a valuable resource on how to charge and bill correctly. Nancy and Theresa are just great to work with- personable, prompt, and always helpful.”


Lawrence S., MA, PT, CSCS | South San Francisco, CA



“We have been in business for over twenty years and have had many Medicare billers. MOS, Inc. has been the most mainstream, accurate and professional! We are very happy and pleased with the services they provide.”


Nancy I., OTR/L, CHT | Van Nuys and Canoga Park, CA



“MOS, Inc. has helped my practice run more efficiently. They have implemented procedures that have streamlined our operations and increased our cash flow.”


Bonnie C, PT | Encino, CA



“For over a decade Medical Outsource Solutions, Inc. has been providing us with outstanding billing and collection services for our Physical Therapy and Sports Medicine practice. The staff at Medical Outsource Solutions, Inc. is quick in responding to our questions but most importantly to the questions and concerns of our patients. They are polite and courteous with our patients and aggressively follow up with insurance companies. Their knowledge has kept us up to date and informed on changes within the medical insurance industry. Their dedication and expertise has allowed us to consistently increase our collections during the 10 years we have worked together.”


Roseanne F, PT | Beverly Hills, CA