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Caleb Cheatham, MD

Staff Psychiatrist
Languages
English
Conditions Treated
Medication Management
ADHD
Anxiety
Bipolar Disorder
Depression
Obsessive-compulsive disorder (OCD)
PTSD/Trauma
LGBTQIA+

Education and training

  • University of Tennessee College of Medicine Doctor of Medicine

Get to know

Caleb Cheatham, MD

Dr. Caleb Cheatham completed his undergraduate studies at Stetson University in DeLand, FL, before earning his medical degree and completing his psychiatry residency at the University of Tennessee Health Science Center in Memphis, TN. He brings a strong foundation in psychopharmacology and a deep commitment to person-centered care.

Dr. Cheatham takes an open, nonjudgmental approach and strives to create a safe space for patients to share vulnerably. He believes in leading with compassion and listening as a core tool for understanding. His treatment philosophy is integrative—combining thoughtful medication management with supportive, individualized therapy—and he encourages patients to consider the role of lifestyle factors like sleep, nutrition, and exercise.

Dr. Cheatham begins with a conversational consultation focused on understanding each patient’s story and needs. Together, they co-create a personalized treatment plan grounded in the patient’s values. He emphasizes clear communication and routinely revisits treatment goals to ensure alignment, progress, and ongoing support.

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Rebecca Crosbie, MD

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Dr. Rebecca Crosbie is a board-certified adult psychiatrist and has been practicing in outpatient psychiatry for nearly 7 years. Her practice focuses on medication management, and she typically offers medication management combined with supportive therapy or Cognitive Behavioral Therapy (CBT) in 30 minute follow-up visits. If Dr. Crosbie feels you would benefit from working with a dedicated talk therapist, she may encourage you to pursue this or refer you in order to achieve the best outcome. Dr. Crosbie is a graduate of Michigan State College of Human Medicine. She completed her psychiatry residency at Pine Rest/Michigan State University in Grand Rapids, MI. She has previously worked as an outpatient psychiatrist and in tele-psychiatry. She has a lot of experience treating patients with a broad array of mental health conditions, including: anxiety disorders, depression, OCD, bipolar disorder, and ADHD. She also treats combined mental health diagnoses such as ADHD plus another diagnosis. She also has a lot of experience working with patients who identify as LGBTQI+. Her approach is always to meet the patient where they are and educate and enable patients to make good choices about treatment that are in line with their personal preferences and values.

Sadiq Mirza, DO

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Dr. Sadiq Mirza earned his medical degree from Western University of Health Sciences in Pomona, California, and completed his psychiatry residency in San Bernardino, California. He has experience in both inpatient and outpatient psychiatry, and for the past five years, he has worked extensively in telepsychiatry, helping patients across a variety of care settings.

New patients can expect a collaborative, patient-centered approach grounded in open communication and mutual respect. Dr. Mirza prioritizes creating a warm and supportive environment where care is personalized to meet individual needs. His style empowers patients to take an active role in their mental health journey through informed decisions and compassionate treatment.

Dr. Mirza begins by thoroughly understanding each patient's unique history and goals during the initial session. This sets the foundation for trust and transparency. Together, they create tailored treatment plans with clear, achievable objectives. Ongoing follow-ups ensure progress is tracked, adjustments are made when necessary, and care remains responsive and effective.

Arjun Kaverimanian, MD

Staff Psychiatrist

Dr. Arjun Kaverimanian is an adult psychiatrist with a clinical approach emphasizing the intersection of medication-based treatment and talk therapy. He earned his medical degree from Saint Louis University School of Medicine, after which he completed his psychiatry residency training at Loyola University Medical Center. During his training, he gained experience across a wide range of mental health settings, including community mental health centers and the Department of Veterans Affairs, and worked at various levels of care—from inpatient units to partial hospitalization and intensive outpatient programs, as well as outpatient clinics.

Dr. Kaverimanian has cultivated a robust skill set in psychotherapy techniques—including psychodynamic therapy, Acceptance and Commitment Therapy, Cognitive Behavioral Therapy, supportive therapy, and mindfulness-based approaches—which he integrates alongside evidence-based medication management.

Dr. Kaverimanian is committed to understanding each patient as a whole, taking into account the interplay of psychological, social, and biological factors that shape a person's mental health. He has particular areas of interest in the treatment of depression, anxiety, and post-traumatic stress disorder.

Puja Kumar, MD

Staff Psychiatrist

Background and credentials

Dr. Puja Kumar is trained in adult, child, and adolescent psychiatry and is a board-certified pediatrician. She earned her Bachelor of Science from the University of Calgary and her medical degree from St. George’s University in Grenada. She completed her pediatrics residency at Maimonides Medical Center in New York and practiced pediatrics with MedStar Shah Medical Group in Maryland before transitioning to psychiatry. She later trained in child and adult psychiatry at University Hospitals Cleveland Medical Center.

Treatment approach

Dr. Kumar provides medication management combined with supportive therapy, typically in 30-minute follow-up visits. She takes a holistic approach to treatment, considering the impact of lifestyle, parenting practices, and family dynamics on mental health. She emphasizes integrative care, ensuring that treatment plans are tailored to each patient’s unique needs and circumstances.

What you can expect in a first visit

During the first visit, patients can expect a thorough and compassionate evaluation, where Dr. Kumar takes time to understand their symptoms, medical history, and environmental influences. She prioritizes collaborative decision-making, working closely with patients and, when applicable, their families, to develop a comprehensive and personalized treatment plan. Follow-up visits typically focus on medication adjustments, supportive therapy, and lifestyle recommendations to optimize mental health outcomes.

Why Talkiatry?

We’re a virtual mental health practice that makes it easy to find great care. We combine quality and convenience to help you thrive—faster. Our providers, like this one, are highly trained experts who specialize in medication management and collaborate with you on a treatment plan that fits your needs and comfort level.

Deora Johnson, PMHNP

Staff Psychiatric Nurse Practitioner

Deora Johnson, PMHNP, is a board-certified adult psychiatric nurse practitioner with 24 years of experience. He is passionate about providing clients with a holistic approach to mental health care, incorporating both pharmacologic and non-pharmacologic interventions. Deora works with adult and senior populations, focusing on the assessment, diagnosis, and treatment of mental health conditions. He collaborates closely with clients to guide them through understanding and selecting the most effective interventions and medication management options for their needs. Supportive therapy, solution-focused therapy, and motivational interviewing are integral components of his medication management sessions.

Deora earned his Master of Science in Nursing from Vanderbilt University in Nashville, Tennessee, and completed a nursing practice degree at the University of Alabama in Birmingham. He has experience treating patients in a variety of outpatient and inpatient settings.

His areas of specialty include the treatment of major depressive disorder, anxiety disorders, bipolar disorder, ADHD, PTSD, and insomnia. His research focused on non-pharmacologic interventions for insomnia in individuals with depression.

Deora also has experience working with military veterans. At the VA Outpatient Clinic in Baltimore, Maryland, he treated veterans returning from Operation Iraqi Freedom and Operation Enduring Freedom, as well as those from the Vietnam and Korean War eras. His clinical work focused on PTSD, major depressive disorder, anxiety disorders, and bipolar disorder.

Deora believes the therapeutic relationship offers a unique opportunity to work collaboratively through life’s challenges. He views medication management as an important part of a comprehensive treatment plan that also includes therapy.

Ruben Mendez, MD

Staff Psychiatrist

Dr. Mendez obtained his medical degree from the University of Texas Medical School in Houston. He subsequently completed his Psychiatry residency training at the same institution, UT Medical School in Houston. Dr. Mendez has extensive training in the field and is board certified in Adult Psychiatry by the American Board of Psychiatry and Neurology. After professional training, Dr. Mendez has had vast experience of 15 years primarily in the outpatient setting including ample experience with telemedicine services to patients. He has extensive experience in diagnosing and treating adult patients dealing with attention deficit disorders and a wide spectrum of adjustment and anxiety disorders. Dr. Mendez has a special interest in the treatment of mood disorders from Major Depression to Bipolar spectrum disorders. Dr. Mendez prioritizes the development of great communication, mutual understanding and trust with his patients as he finds these elements to be key to a successful treatment. He establishes his treatment plans upon evidence-based guidelines and encourages a holistic approach for optimal well-being. Through effective medication management and supportive psychotherapy, Dr. Mendez leads his patients to optimal mental health. He encourages patients to strive to develop fulfillment and optimal functionality in their life's roles.

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Specialties
Medication Management
ADHD
Anxiety
Bipolar Disorder
Depression
Obsessive-compulsive disorder (OCD)
PTSD/Trauma
LGBTQIA+
States
New York
Tennessee
Colorado
Languages
English
Takes insurance
Virtual visits
years experience