Built for Behavioral Health, Led by Experience
ABOUT NELLOS
Nellos Behavioral Partners exists to give behavioral health providers a billing partner who understands their world, communicates clearly, and treats every claim like revenue that matters.
OUR STORY
Nellos Behavioral Partners was founded in 2022 after a simple realization: behavioral health providers were leaving revenue uncollected, not because the money wasn't there, but because billing is complex, time-consuming, and easy to let slip when you're focused on clients.
Founder Corey Nellos built the firm to change that. Through conversations with providers, one pattern kept surfacing: practices needed a billing partner who understood the specialty's specific challenges, communicated before problems grew, and treated every claim like the revenue it represents.
Today, Nellos Behavioral Partners works with behavioral health practices across the country, combining specialized billing expertise with proactive communication, so providers can stay focused on care while their revenue cycle is handled with precision.
Why Nellos Exists
MISSION & VISION
Our Mission
Nellos Behavioral Partners helps behavioral health practices capture the revenue they earn through expert insurance billing, accounts receivable recovery, and practice management support for providers across the United States. Using current billing technology and proven workflows, we proactively manage the full revenue cycle while remaining committed to sustainable growth and financial soundness. Guided by integrity, transparency, and the belief that every claim is revenue that matters, we apply specialized behavioral health billing expertise that others overlook, so the providers we serve can stay focused on delivering quality mental health care to their communities, supported by a dedicated team.
To become the revenue cycle management partner that behavioral health practices nationwide trust most, setting the standard for specialized billing expertise that lets providers focus fully on care.
Our Vision
Every practice is different, so every engagement is tailored to fit. We take time to understand how your practice runs, then manage your revenue cycle proactively, catching issues before they cost you and keeping you informed the whole way. No black box, no waiting until month-end to find out where things stand. Just clear, consistent communication and billing handled with care.
How We Work
Integrity. We do what's right for your practice, every time.
Transparency. You always know where your revenue stands.
Precision. Every claim is handled with attention to detail.
Partnership. We're invested in your practice's success, not just its claims.
What We Stand For
Corey Nellos
Founder
Corey Nellos founded Nellos Behavioral Partners to bring behavioral health providers a billing partner who genuinely understands their world. With a background in social work and a graduate business education, he combines clinical-world fluency with disciplined revenue cycle management. His approach is built on the belief that behavioral health billing is a specialty of its own, one that rewards expertise, attention, and proactive communication.
MBA, New Mexico Highlands University
BSW, summa cum laude, New Mexico Highlands University
Associate of Arts in Human Services, with honors, CNM
Member, Delta Mu Delta Honor Society
Member, Phi Kappa Phi Honor Society
WHAT CLIENTS SAY
Trusted by the Practices We Serve
"This level of trust, kindness, knowledge and support goes further than you expect or could imagine." — Sylma F., LMFT, LPAT, ATR-BC
"He stays on top of every claim, follows up when needed, and makes sure I'm getting paid on time. It's been such a relief." — Star S., LPCC
"He is not only exceptional at the technical aspects of billing, but he also operates as a true partner." — Jeffery Bayless, PMHNP-BC, Sagebrush Psychiatry, PLLC
"He does so much more than just submit claims, he keeps everything running smoothly behind the scenes. Whenever I think I've found a problem, it has usually already been taken care of." — Deborah P., MBA
“He stepped into a very messy billing system left behind by my previous biller and immediately brought clarity, structure, and order to years of unresolved issues." — Laurel Lord, LCSW,
Aspen Vista Therapy, LLC
"He uncovered additional revenue opportunities we didn't realize we were missing... he helped increase collections and recover revenue that would have otherwise been lost." — Erica O., LCSW, Corazon Counseling and Consulting LLC
"It truly feels like having a dependable partner who is just as invested in the success of my practice as I am." — Jessica, LPCC
"Working with Corey has helped me manage anxiety and frustration surrounding billing. I am enjoying work more than I used to!" —
Catherine H.