Our Team
At our practice, our team of knowledgeable and dedicated practitioners and staff are dedicated to providing the best possible assessment, treatment, and support for adults with ADD and ADHD. We are committed to excellence in patient care and strive to ensure that our patients receive the highest level of support from the moment they contact us. Our team is here to serve you and we are dedicated to helping you manage your ADHD and live a fulfilling life. We invite you to learn more about our team below!
Practitioners
Vahid Osman, MD
Board-Certified Psychiatrist
Dr. Osman is a Board-Certified Psychiatrist and Addiction Medicine specialist with over 20 years of clinical experience. He completed his psychiatry residency training at Austin State Hospital in Texas, and has built his career around treating adults with ADHD, substance use disorders, and co-occurring neurodevelopmental conditions.
At Millennium Medical Associates, Dr. Osman leads clinical oversight of the practice, working closely with our team of psychiatric providers to ensure every patient receives thoughtful, evidence-based care.
[+] More about Dr. Osman
Dr. Osman's addiction medicine background informs how MMA approaches controlled substance prescribing. He's built his reputation on careful diagnostic work, conservative medication management, and treating patients as individuals rather than case files.
Before joining MMA, Dr. Osman also completed psychiatric residency training at Varrene Jarcy Hospital in France. He has over two decades of experience treating ADHD in adults across a range of presentations and complexity levels.
ADHD Certified Clinical Services Provider (ADHD-CCSP)
ShaRhonda is a board-certified Psychiatric Mental Health Nurse Practitioner and ADHD-CCSP certified specialist with a doctorate in nursing practice and over 11 years of clinical experience. She completed her DNP at California State University, Fullerton and her psychiatric specialty training at Charles Drew University of Medicine and Science.
Her clinical background includes psychiatric care at Keck Medicine of USC and the Veterans Health Administration, where she worked with a wide range of patients and complex mental health presentations before moving into outpatient ADHD care.
At MMA, ShaRhonda focuses on thorough evaluations, personalized treatment planning, and the kind of ongoing medication management that actually moves the needle for adults managing ADHD.
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Beyond direct patient care, ShaRhonda has held leadership roles including Assistant Nurse Manager and Clinical Nurse Care Coordinator, giving her experience managing complex cases and working across multi-disciplinary teams.
Her approach blends evidence-based psychiatric care with real patient education. She believes patients do better when they understand what's happening and why, not just what to take. That shows up in how she runs her visits, how she walks patients through treatment decisions, and how she handles the ongoing adjustments that good ADHD care requires.
Outside of work, ShaRhonda is committed to lifelong learning and stays active in her community.
ADHD Certified Clinical Services Provider (ADHD-CCSP)
Lara is a Psychiatric Mental Health Nurse Practitioner and ADHD-CCSP certified specialist focused on adult ADHD. She holds an MSN from the University of Texas at Austin and is board certified in both psychiatric mental health and family nursing practice.
Her practice centers almost entirely on adult ADHD, and she's built deep experience with the full range of presentations we see: patients who've been treated for years and need a new provider, adults diagnosed later in life, and people who suspect ADHD but have never been formally evaluated.
Lara is known for being genuinely engaged in her patients' care. She listens, she remembers, and she treats each case like it matters, because it does.
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Before focusing on ADHD, Lara worked across a range of clinical settings including endocrine and diabetes management, internal medicine, and primary care. That broader medical background informs how she thinks about ADHD treatment, especially for patients with co-occurring conditions or medications that need to be factored into the plan.
In 2020 she completed a Post-Masters Certificate in Family Nurse Practitioner studies at the University of Texas at Arlington, further expanding her clinical scope. Outside of practice, Lara is a mom of three teenagers, stays active through kickboxing, and is an unapologetic foodie who's always up for trying a new restaurant.
Staff
Dennis FowleR
Dennis Fowler is an Administrative Manager of Millennium Medical Associates. He helps oversee non-clinical aspects of the practice, from patient care standards to community outreach. He works to ensure that Millennium Medical Associates regularly provides the highest level of patient service.
[+] More about Dennis
He has 18 years of private healthcare administrative experience and attended New York University (NYU).
Justin Wiesner
As the non-clinical practice director and administrator, Justin Wiesner plays a crucial role in the smooth operation of the practice. He is responsible for overseeing the day-to-day functioning of the practice and ensuring that it is running efficiently and effectively.
Justin is dedicated to maintaining exceptional service for both patients and staff, and his leadership and management skills help to ensure that the practice is able to provide the highest level of care to its patients.
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With a diverse background in both technology and hospitality, Justin brings a unique and mindful approach to healthcare management.
He is dedicated to making sure that patients feel comfortable and confident in their healthcare journey, and has worked to redefine the way that appointments and follow-up care are managed in a doctor's office, always keeping the patient's perspective at the forefront of his mind.
In addition to his work in healthcare, Justin is deeply committed to philanthropy and empowering those in his community. In his personal life, he enjoys spending time with his partner, engaging with the arts, and savoring delicious foods.
Amy
Amy serves as the Assistant Practice Director.
Amy interacts directly with new patients to ensure timely appointment scheduling, answers non-medical questions, and passes along patient messages or questions to providers.
Brynnan
With over 10 years of experience in healthcare, Brynnan is a Nationally Certified Medical Assistant with a passion for mental health and psychology. While working full time to treat sufferers of ADHD, she is also working on her nursing degree.
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Amy’s daily priority is to make the practice experience as stress-free for our patients as is possible.
A graduate of Arizona State University, Amy enjoys cooking, traveling, and game nights.
[+] More about Brynnan
Originally from the Pacific Northwest, Brynnan enjoys spending her time outdoors and trying new adventures.
CRYSTAL
Crystal is a patient advocate and problem-solver, committed to providing outstanding care to every patient she interacts with. As a prior authorization specialist, she has a deep understanding of the complex pharmacy and insurance systems and helps our patients navigate these processes to ensure accurate and timely prescription fulfillment.
In addition, Crystal offers support for mandatory blood pressure checks and the prescription processes, ensuring that patients receive the best possible care from our practice. She also takes a comprehensive approach, verifying appointments and addressing any inquiries or concerns that patients may have.
With her expertise and commitment to patient care, Crystal is a valuable member of our medical team.
Leny
Leny is an instrumental part of the team at Millennium Medical Associates, where she plays a key role in facilitating the submission of insurance claims for patients. With the practice being out-of-network, Leny works tirelessly to help patients receive the maximum reimbursement possible from their insurance provider.
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Leny’s dedication to quality patient service by handling the insurance claims helps ensure patient satisfaction, both before and after visits.