What my clients say

Therapists and practices across Massachusetts trust EllBee with their billing and credentialing. Here's what they have to say, in their own words.

“Lesly and her team were nothing short of amazing for my practice. When my former billing company did not follow through on claims or credentialing services, Lesly agreed to work with me and got everything straightened out. We now have a predictable cash flow with much better systems in place. She also fought with the insurance companies for reimbursement and was able to recoup almost $20,000 which the other billers had done incorrectly. I couldn't be more thankful for her work and dedication.”

Lauren Harris, LMHC · Center for Perinatal Wellness

“Working with Lesly has been one of the best decisions that I've made for my therapy private practice! I was not aware of how much stress I was experiencing due to having to deal directly with insurance companies. All that time spent sitting on hold for what felt like hours as my next session drew closer and closer, only to hang up without answers regarding an aging claim — all of that became a thing of the past!

Now, Lesly intuitively deals with all of that for me, with no need for me to get involved. She has also taken care of various other projects for me, like switching me from one EHR to another, updating some monthly spreadsheet trackers that I use, helping me organize a huge quantity of digital files, etc.

If you're on the fence, just hire Lesly. Just do it. Consider her a form of self-care! You won't regret it!”

Kristin Espinosa, LMHC · Inner Catalyst Therapeutic Solutions

“I feel like Lesly and I built my practice together from the start, as I have been working with her from day 1. She credentialed me with insurance companies, set up my EHR, and handled every aspect of billing. I trust her completely and rely on her 110%. If it weren't for Lesly, I would be lost and wouldn't be getting paid for my work as a therapist. She's always quick to respond and find a resolution to any problem. If you need a billing provider, I recommend Lesly without hesitation and with full confidence. She makes it all possible for me and I am grateful for her service.”

Julia Thouin, LICSW · Be. Behavioral Health Care

“As a woman-owned small business, my mental health group practice has always prioritized building strong, trusting relationships—not just with our clients but also with our partners. Choosing EllBee Services has been one of the best decisions we've made for our growing practice.

From the very beginning, their attention to detail and dedication to service stood out. They continually take time to understand our specific needs. It's clear that they genuinely care about their clients, and that personal touch has made all the difference.

Since partnering with EllBee Services, I've felt an incredible sense of relief. Their expertise has streamlined our billing processes, allowing me to focus on employee needs, client care, and growing our practice.

I wholeheartedly trust EllBee Services with our billing needs, and I can't recommend them enough. They are not just a service provider; they are a vital part of our practice operations, supporting us every step of the way. Thank you for your continued outstanding service and for being an integral part of our success!”

Cheryl Przezdziecki, LMHC

“I found Lesly when another billing company had become unresponsive, and I was desperate! She patiently spent many hours helping me clean up the mess that had been left and I have been a loyal customer ever since. Lesly and her team are efficient, effective, responsive, and reliable, and they go out of their way to patiently answer questions and ultimately get the job done. I never have to worry about getting paid on time. I wholeheartedly trust Lesly and highly recommend her and her team to anyone looking for support with their billing.”

Carolyn Wallace, LICSW

“I was in desperate need of help with a large recoupment caused by an insurance processing issue, as well as a separate plan that a patient wasn't even aware they had. The situation had me pretty panicked due to the high dollar amount involved. I knew it would require a lot of time on the phone and a level of expertise in dealing with insurance that I simply didn't have. Thankfully, a colleague referred me to Lesly, and she truly saved the day!

Lesly was incredible. She jumped right into the situation, and her diligence and persistence quickly resolved the issue. What really stood out was her consistent communication. She kept me updated every step of the way and even took the time to sort out my EHR billing to make sure everything was in order. By the end of it, all of the claims were paid out, and I was able to breathe again.

Lesly's expertise, patience, and attention to detail have been such a relief. I cannot recommend her enough for anyone needing billing support, and I won't hesitate to reach out to her again if I run into any more billing issues!”

Stephanie Taylor, LMHC

“Lesly and Jenny are hands down the absolute best when it comes to billing and credentialing support. Starting a private practice felt incredibly intimidating at first, but working with EllBee has made the entire process feel empowering and manageable. Their credentialing support alone has lifted hours and hours of administrative work off my plate—giving me time and peace of mind I only wish I had seven years ago while juggling roles at other agencies. Whenever I feel anxious, uncertain, or overwhelmed, they consistently show up with patience, creativity, and innovative solutions. Their support has been invaluable, and I truly don't know where I'd be without them.”

Amelia Hasbun, LMFT

“I transferred all of my billing as a private practice clinician to Lesly four years ago. She managed to terminate the connection with my previous billing company which was poorly managed and questionable in its practices. This was a profound service as it was not just that I needed Lesly to start managing all of my billing, I also needed to extract myself from a company that was highly suspect. Suffice to say, I needed to land with someone I trusted, and this above all else, is what Lesly brings to the table. She is honest, communicative, reliable, competent, knowledgeable, and infinitely more patient with the insurance world than I will ever be.

I have often said to her that I would not keep my private practice open if I had to manage the business end of things and be in communication with insurance companies to get reimbursed. It is an uphill battle for many and the time required to follow up on behalf of clients is not within my bandwidth. Simply put, Lesly allows me to do the work I love to do and be the best clinician I can be to my clients while letting go of the tedious and time-consuming billing that often burns out skilled clinicians.

Lastly, that Lesly is a woman, entrepreneur, and sole proprietor gives me great pride as I am aligned with her in her professional efforts and appreciate all the support she lends to my practice. I consider her to be very much a partner in my professional life.”

Elise Starr, LICSW

“Navigating insurance plans can feel like trying to understand a foreign language, and it often leaves me feeling overwhelmed and disconnected. Enter Lesly and EllBee Services. Lesly is truly fantastic! She is not only incredibly responsive but also has an amazing ability to make the complex billing process feel comfortable and manageable. She has taken the worry out of dealing with the complicated details of insurance and billing, allowing me to focus on my work with peace of mind.

What truly sets Lesly apart is her personal approach. She treats me as a human, never just a number, and regardless of how many questions I ask, she always responds with patience and clarity. I never feel incompetent under her guidance, and that sense of respect and understanding is invaluable. Working with Lesly has been more than a pleasure—it has genuinely enhanced my experience. I wholeheartedly recommend her and EllBee Services to anyone looking for a knowledgeable, compassionate, and dependable billing partner.”

Allison Wilcox, LMHC

“Lesly has been such a help to me in my practice. Lesly took the lead on my credentialing process and is now my go-to person for any billing challenges I face. She is very knowledgeable and responsive and resolves any issues I have had with billing very quickly and thoroughly. With her very reasonable rates, I have peace of mind that lets me focus on the clinical pieces of my work. Lesly has my highest recommendation!”

Jen Malcolm-Brown, LICSW

“I hired Ms. Guerin in 2016 to work in my private practice after noticing her competence and initiative in a group practice where we worked. I ran my office on a complex practice management software that she quickly mastered. In addition to managing the routine and special tasks I requested, she has proposed and carried out other organizing and documentation ideas for my office. She handles insurance and patient payments, claims tracking, patient billing, banking, scanning, and filing for me. She is pleasant to work with, professional, and completely reliable. I highly recommend her!”

Lisa A. Uyehara, MD

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