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Zachary Keller, DO

Staff Psychiatrist
Languages
English
SPECIALTIES
Medication Management
ADHD
Anxiety
Bipolar Disorder
Depression
Eating Disorders
Obsessive-compulsive disorder (OCD)
Personality Disorders
PTSD/Trauma
Self-harm
Substance Use
LGBTQIA+

Education and training

  • Rocky Vista University COM  (  Doctor of Osteopathic Medicine  )

Get to know

Zachary Keller, DO

Dr. Zac Keller, DO, DABPN (he/his), is a board-certified psychiatrist with experience across inpatient and outpatient settings. He has held leadership roles including Interim Medical Director and Director at Richard Young Hospital, where he also created and led the hospital’s ECT program. Dr. Keller’s clinical focus includes ADHD, PTSD, and personality disorders, and he brings an integrative lens to psychiatric care.

Dr. Keller takes a collaborative, supportive, and evidence-based approach to treatment. He values confidentiality, culturally sensitive care, and trauma-informed practice. Known for his warm yet direct communication style, he works to create a respectful, nonjudgmental environment where patients feel heard, understood, and actively involved in their care.

Care begins with a comprehensive intake that explores medical, psychiatric, social, and functional aspects of a patient’s life. Session length and frequency are tailored to individual needs. Treatment plans are developed collaboratively and may include medication management combined with talk therapy and other evidence-based interventions. Progress is reviewed regularly and adjusted based on ongoing dialogue.

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Karina Fatova, MD

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Dr. Karina Fatova is a board certified psychiatrist who hails from New York City but has made New Orleans her home for the past ten years. She is a graduate of Albert Einstein College of Medicine in Bronx, NY, and she did her adult psychiatry residency at Tulane University in New Orleans, LA. She was proud to have her first position post-residency at the River Oaks Hospital Trauma Unit in New Orleans, LA where she treated patients with Complex PTSD and eating disorders. The Trauma Unit was one of a few of its kind nationally because it provided very specialized treatment that was affordable to many. Dr. Fatova then went on to work at the New Orleans Veterans Affairs Hospital for the last five years in its ambulatory outpatient mental health clinic. Though her passion is Complex Trauma/PTSD, she also regularly saw veteran patients who have been diagnosed with anxiety, depression, bipolar disorder, ADHD, and adjustment disorder. During her five years at the New Orleans VA, she received three special commendations from the director of the VA for feedback from her patients about her effective integrative approach to supportive psychotherapy and medication management. She believes that her rapport with her patients, and their therapeutic work together, is just as important as the medication she prescribes to heal or alleviate their symptoms. Dr Fatova employs psychodynamic therapy techniques, at times, to help those patients who would like to explore childhood experiences that may continue to impact them in their adult lives. With respect to medication management she regularly helps patients target symptoms such as sleep issues, nightmares, persistent worry, emotional dysregulation, frequent mood changes, impulsivity, and "toning down the nervous system," among others. She strongly believes that treatment decisions are best approached as a collaboration between patient and doctor. She sees young adults who are just starting their journey into adulthood, as well as adults who have been navigating life with challenges, which may include untreated, or poorly treated, mental health symptoms. Often, by the time Dr. Fatova sees a patient, they may have lost a significant amount of faith in their mental health doctors, and she is particularly attuned to helping individuals with this type of experience.

Patricia Grendell, PMHNP

Staff Nurse Practitioner

Patricia Grendell is a board-certified Psychiatric-Mental Health Nurse Practitioner who provides mental health care using a personalized, holistic approach. Patricia specializes in psychiatric evaluation and medication management along with psychotherapy and integrative interventions. Prior to receiving education and training in Nursing at New York University and Case Western Reserve University, Patricia earned a Master of Social Work from Boston College with a focus on health and mental health.  

Patricia specializes in working with adults experiencing a wide range of acute and chronic stressors and mental health symptoms. Patricia tailors' treatment to the goals, needs, and comfort level of each individual at her or his own pace. Patricia builds connections with patients so that they feel heard and understood, and partners with each individual to determine the most appropriate treatment strategies that maximize comfort, safety, and positive results.  

Over the past ten years as a Nurse Practitioner in outpatient and inpatient environments, Patricia has helped patients improve and overcome conditions including depression, anxiety, OCD, PTSD, ADHD, and insomnia. Using a combination of medication management, individual therapy, and psychoeducation, Patricia develops individualized treatment plans centered around patients’ priorities and safety to achieve improvements in health and quality of life.

Mary Bartek, MD

Staff Psychiatrist

Dr. Bartek holds the position of Staff Psychiatrist at Talkiatry. She is board-certified in General Psychiatry, Pediatrics, and Child and Adolescent Psychiatry. She has been caring for children and adolescents as a physician for more than 15 years. Dr. Bartek's approach is holistic, collaborative, supportive, and patient-centered. Dr. Bartek draws on her years as a pediatrician working with families and children in her work as a psychiatrist. Dr. Bartek incorporates therapeutic techniques into medication management visits, but she may also recommend adding a therapist to your care team for the best results. She received her medical degree from the University of Washington School of Medicine in Seattle, WA, before moving to Memphis to complete her residency in Pediatrics at the University of Tennessee Health Sciences Center and Le Bonheur Children's Hospital. She completed her undergraduate studies at Haverford College in Pennsylvania. After completing training, she remained in Memphis and worked in the Le Bonheur Children's Hospital Emergency Department as a pediatrician. She then moved to Nashville to work at the Monroe Carell Jr. Children's Hospital at Vanderbilt in the Emergency Department Fast Track and After-Hours Clinics. Dr. Bartek transitioned to primary care pediatrics at Pediatric Associates of Davidson County for several years before returning to the University of Tennessee Health Science Center in Memphis to complete the Child and Adolescent Psychiatry Post-Pediatric Portal Fellowship program. Dr. Bartek's primary clinical focus is treating children and adolescents.

Velda Pugh, MD

Staff Psychiatrist

Dr. Velda Pugh-Kinsey is a Board-Certified Psychiatrist with over three decades of experience in both outpatient and inpatient settings. She earned her medical degree from the University of Alabama School of Medicine and completed her psychiatry residency at University Hospital. She has previously served as Chief of Mental Health at a VA Hospital and has maintained a successful private practice focused on medication management and supportive therapy.

Dr. Pugh-Kinsey values open communication and believes in building a warm, respectful environment where patients feel heard. She works collaboratively with patients to set clear treatment goals and tailors her approach to meet each person’s unique needs. Her practice emphasizes both medication management and supportive therapy to promote long-term well-being.

During initial sessions, Dr. Pugh-Kinsey takes time to understand each patient’s history, concerns, and goals. She uses a team-based approach, partnering with patients in treatment planning and decision-making to ensure care is both effective and aligned with their values.

Saba Mughal, MD

Staff Psychiatrist

Dr. Saba Mughal is a board-certified adult psychiatrist with over 5 years of experience in providing compassionate, patient-centered care. Specializing in the diagnosis, treatment, and management of a wide range of mental health conditions, Dr. Mughal works closely with individuals facing challenges such as depression, anxiety, bipolar disorder, PTSD, and OCD.‍Dr. Mughal employs an integrative approach to treatment, combining evidence-based therapies like Cognitive Behavioral Therapy (CBT), medication management, and mindfulness techniques, tailored to each patient's needs. In addition to individual therapy, Dr. Mughal collaborates with family members and other healthcare providers to ensure a holistic and coordinated treatment plan.‍With a deep commitment to supporting emotional well-being, Dr. Mughal fosters a warm, non-judgmental environment where patients feel heard, respected, and empowered to take an active role in their mental health journey. Dr. Mughal believes that mental health is integral to overall wellness, and works to reduce stigma surrounding psychiatric care by promoting open dialogue and understanding.‍Dr. Mughal completed her medical school at Jinnah Sindh Medical University, Pakistan and completed her residency training at Nassau University Medical Center, East Meadow, NY. She is a member of APA and a diplomat of the American Board of Psychiatry & Neurology. She is passionate about advocating for mental health awareness in the community.

Tammara Davis, MD

Staff Psychiatrist

Dr. Tammara Davis is a board-certified adult psychiatrist with over 15 years of experience treating patients across inpatient, outpatient, emergency, and telepsychiatry settings. She earned her medical degree from the University of Tennessee Health Science Center, completed her psychiatry residency at St. Elizabeths Hospital in Washington, DC, and holds a B.S. from Xavier University of Louisiana.

Dr. Davis previously served as a Primary Care–Mental Health Integration psychiatrist at the Veterans Health Administration, where she helped expand access to care in community-based clinics. She is an active member of the Black Psychiatrists of America, where she advances advocacy and equity in mental health care. While she has treated a wide variety of patients from all walks of life, her clinical focus has been on improving access to quality mental healthcare for historically marginalized communities.

Dr. Davis specializes in mood and anxiety disorders, including depression, PTSD, and perinatal mental health. Her approach is holistic, integrative, and patient-centered—grounded in cultural humility and collaborative care. She does not prescribe benzodiazepines, focusing instead on evidence-based strategies that support long-term wellness. While treating a wide variety of patients, Dr. Davis’ clinical focus has been on adults from marginalized and/or minoritized communities.

Dr. Davis begins care with a consultation to ensure a strong fit and shared treatment goals. Dr. Davis is committed to creating a safe, trusting space where patients feel empowered and in control of their healing. She recognizes that not all patients require medication and integrates culturally affirming support when therapy and education are more appropriate.

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Specialties
Medication Management
ADHD
Anxiety
Bipolar Disorder
Depression
Eating Disorders
Obsessive-compulsive disorder (OCD)
Personality Disorders
PTSD/Trauma
Self-harm
Substance Use
LGBTQIA+
States
Nebraska
Languages
English
Takes insurance
Virtual visits
years experience