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Real People Supporting
Fellow Practitioners.

So You Can Focus on Care.

At DAS Billing Solutions, we’re passionate about helping mental health providers succeed.

Our friendly, expert team handles the billing, so you can focus on your patients.

GET TO KNOW US

Meet the Founder

Hi, I’m Shannon Dobson, I started DAS Billing Solutions because I saw too many dedicated clinicians overwhelmed by the complex world of medical billing.

I felt there was a better way – a way that allows you to focus on caring for your patients while a trusted partner takes care of the billing. We’ve built a team that understands the unique needs of mental health providers, ensuring fast, and compassionate billing support.

GET IN TOUCH

What Makes Us Different

Shannon Dobson

Founder

Lety Carreño

Billing Manager

Desirée Rangel

Billing Specialist

Heather Schoolfield

Billing Specialist

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Schedule a Call

Heather Schoolfield, Billing Specialist

Heather is a certified biller with over a decade of experience and a true passion for the world of billing. She thrives on helping providers and genuinely enjoys the work she does each day.

At home, Heather is surrounded by her husband, two children, and four dogs. An avid animal lover, she enjoys hiking with her pups, practicing yoga, and watching horror movies in her free time.

Desirée Rangel, Billing Specialist

Desirée is dedicated to supporting providers in the mental health field and takes great pride in helping them succeed. She brings care, attention to detail, and a strong commitment to service in her role as Billing Specialist.

Outside of work, Desirée enjoys relaxing with movies and books, treating herself to a Starbucks run, and spending time with her beloved cats.

Jamie Kalina, Billing Specialist

Jamie Kalina started working in insurance in 2015 and is very excited to move to the billing side of insurance. She attended college at College of DuPage before transferring to Western Illinois University. Jamie is very detail oriented and enjoys billing and aging, she loves learning new things everyday! Jamie and Her husband Jonny have two children and a Dog. When not working you can find Jamie with her family playing games, entertaining or hanging around their fire pit.

Michelle Fallmaier, Billing Manager

Michelle is a 2003 graduate of Lewis University with a Bachelor’s Degree in Management Information Systems and a minor in Business Administration. She is an accomplished Billing Specialist with knowledge and background of problem solving and organizational skills along with project management. While overseeing approximately fifty accounts, Michelle has the ability to treat each one individually while applying all the skills necessary to keep up to date with billing and aging. In Michelle’s time outside of work, she is an enthusiastic mother of three children and a passionate coordinator for the National Association for Down Syndrome Welcome Basket Program.

Lety Carreño, Billing Manager

Lety brings nearly two decades of experience in insurance and customer service to D.A.S. Billing Solutions, where she has been a valued team member since 2021. As Billing Manager, her primary focus is ensuring clients feel supported and satisfied.

Outside of work, Lety enjoys time with her husband and three children, keeping life balanced with family walks, true crime shows, and a little self-care through Starbucks runs and nail days.

Shannon Dobson, Owner

Shannon has worked in the medical billing field since 2010 and quickly discovered both a gift and a passion for helping providers get paid for their hard work. After earning her Bachelor’s Degree in Health Information Management, she founded D.A.S. Billing Solutions, Inc., building a company dedicated to supporting healthcare professionals with care and precision.

Outside of work, Shannon values self-care and balance. She enjoys live music, stand-up comedy, yoga, and long walks in nature, as well as time with her husband, Eric. Her daily meditation practice helps her stay grounded while leading both her family and her flourishing company.