About Us

Compassionate care rooted in empathy and clinical excellence.


About Gladwell LLC

Your Partner in Mental Wellness

Gladwell LLC is a compassionate, nurse practitioner-led psychiatric practice dedicated to helping individuals of all ages — children, teens, and adults — navigate the complexities of mental health with confidence and clarity.

Our mission is rooted in the belief that everyone deserves high-quality, evidence-based mental health care, no matter their background or circumstance. We strive to remove barriers by offering affordable services, flexible scheduling, and convenient options that meet you where you are.

Mental health care team at Gladwell LLC
Who We Are

Our Company & Approach

Our Company

Gladwell LLC was started with the thought of catering to the high number of people suffering from mental health problems and substance use disorders yet having no one to care for them. It was created to cater for those with insurances and without. It is meant to bridge the gap for those in our society who face a lot of anguish because no one cares. We care, we see you and we are here to help!

Our Approach

At Gladwell LLC, we use evidence-based techniques tailored to your needs. Our approach combines compassion with practical tools, helping you navigate challenges like anxiety and depression. Together, we'll create a supportive environment where you can grow and heal.

Our Values

What We Stand For

Accessibility

We believe everyone deserves mental health support regardless of insurance status or financial background. We serve patients with and without insurance.

Compassion

Every patient is seen, heard, and treated with genuine empathy, dignity, and respect — in a judgment-free environment where healing can begin.

Clinical Excellence

All care is grounded in evidence-based psychiatric practices, ensuring patients receive research-backed, effective treatment of the highest quality.

Catherine Donnerstag, PMHNP-BC — Founder and Provider at Gladwell LLC
Catherine Donnerstag PMHNP-BC • Founder & Provider
Meet Your Provider

My Biography

Catherine Donnerstag is a mother, wife, and grandmother. Born in 1966, she joined nursing at 17 years of age and has spent over four decades as a caregiver, nurse, and provider. She has witnessed firsthand how mental health challenges affect not only local communities but people around the world. It is her hope that together, we can change the landscape of mental health — one person at a time.

40+ Years of nursing & psychiatric care
Areas of Focus Mental Health, Substance Use, Telehealth
Serving Washington & Maryland
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Begin Your Wellness Journey Today

Our team is ready to support you. Book an appointment or call us to learn more about our services.