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Meet Our Team

Mary Muranja Samar Healthcare Website Headshot
Areas of Expertise
  • Anxiety

  • Bipolar Disorder

  • Depression

  • PTSD

  • Schizophrenia

  • Schizoaffective Disorder

  • Psychotic Disorder

  • Grief and Loss

  • Stress Management

  • Mood Disorders

  • Substance Abuse

  • Smoking Cessation

  • Trauma Responsive Treatment

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About Dr. Mary Muranja 

Dr. Mary Muranja is a dual board-certified Psychiatric Mental Health Nurse Practitioner (PMHNP-BC) and Family Nurse Practitioner (FNP). Mary has extensive training and experience treating patients with psychiatric disorders across the whole lifespan and across various practice settings, from hospitals to outpatient clinics. Mary diagnoses, treats, and prescribes medication for children, adolescents, and adults. Some of her practice specialties include, but not limited to ADD/ADHD, Depression, Anxiety, Bipolar, Schizophrenia, PTSD, and Substance use disorder. 

Mary’s clinical focus is on mental health and substance abuse. Indeed, her 15+ years of experience in the healthcare field can yield positive healthcare outcomes in your life. Mary knows and recognizes that there is no solo approach to treating patients holistically as well as successfully. Certainly, what is right for one patient may be completely different for the next patient. Rest assured that Mary has been trained and qualified to diagnose as well as treat a wide range of psychiatric conditions across the entire lifespan. 

Through proper diagnosis, treatment, patient education, and excellent patient care, Mary is making a positive difference in Georgia. Mary’s primary goal is to provide the highest level of patient-centered, personalized, and compassionate care to psychiatric patients throughout the great state of Georgia.

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Areas of Expertise
  • Mood Disorders
  • Bipolar Disorder
  • Depression
  • Anxiety Disorders
  • ADHD
  • Psychotic Disorders 
  • Personality Disorders
  • Substance Abuse
Populations Served
  • Teenagers
  • Adults
  • Families 
  • War Veterans

About Joseph Mwangi 

Joseph Mwangi, PMHNP-BC, is a Psychiatric Mental Health Nurse Practitioner (PMHNP) Certified by the American Nurses Credentialing Center (ANCC). He carries an overall 21 years of experience in healthcare, extending from acute inpatient care, outpatient clinics, nursing homes, and community home visits. He has developed expertise in a wide range of disorders through extensive training and experience treating patients across the lifespan. He applies a holistic approach to mental health care that incorporates both pharmacological interventions and evidence-based therapeutic techniques, fostering a comprehensive and individualized treatment plan for the patient. He assesses, diagnoses, and provides individualized treatment plans by prescribing medications, providing psychotherapy, or both.

Joseph holds a Masters in Psychiatric Mental Health Nurse Practitioner from Walden University and successfully completed valuable hands-on experience by providing evidence-based mental health services in different healthcare settings such as acute psychiatric hospitals, intensive outpatient psychiatric (IOP) centers, nursing homes, private practice, and caring for the homeless population in their area of comfort. 

As a Psychiatric Nurse Practitioner, Joseph believes in the transformative power of compassionate and comprehensive mental health care. His goal is to create a safe and non-judgmental space where individuals can explore their thoughts and emotions, fostering self-discovery and personal growth.
Joseph's practice is rooted in patient-centered philosophy in the great states of Arizona and California, where he prioritizes building trusting and collaborative relationships with those under his care. He recognizes the unique qualities of each individual and works closely with them to develop tailored treatment strategies that align with their goals, values, and preferences.

About Ruby Ranolo 
Office Manager

Ruby Ranolo is Samar Healthcare's Office manager and virtual assistant professional. She enjoys supporting all our patients and the team "behind the scenes." She is ready to answer any questions you have regarding your appointments, forms and requests. Just let her know what you need and she'll be able to assist you. If you have any questions or concerns about your appointment, email us at
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