Addiction Specialists & Doctors | Banyan Treatment Centers

Addiction Specialists and Doctors at Banyan


This page offers a brief explanation and quick reference of what different addiction doctors and specialists do. It’s tough to admit when you have a drug or alcohol problem, but it’s even tougher to recover. However, overcoming addiction is easier when you have the right support. Training drug addiction treatment doctors and specialists helps individuals with substance use disorders get sober and change their lives for the better. Keep reading to meet Banyan’s team of addiction specialists and professionals and learn about the trained, educated, and passionate people that can help you or a loved one get sober.

Types of Certified Addiction Specialists

A client will usually meet many types of addiction treatment specialists during partial hospitalization and residential treatment. These professionals have various titles, skills, and schooling.

For instance, the term addiction specialist refers to trained medical doctors. States regulate most addiction recovery jobs, and state licensing protects patients’ health and privacy.

Licensed addiction recovery specialists have completed specific amounts of education, testing, and supervised work to ensure they have the experience and education necessary to treat clients while keeping them safe. Certified addiction specialists have met national or international organizations’ requirements, as well.

Below is a list of the various types of addiction specialists and doctors that are normally on staff in a rehab facility.

Addiction Intervention Specialist

Also known as certified intervention specialists, an interventionist helps persuade people with drug or alcohol use disorders to seek substance abuse treatment. First, they meet with the family and friends of the individual to learn more about them, and then they design a plan for getting the individual to meet with them and have the intervention.

While technically anyone can call themselves an interventionist, some interventionists have a certification, including the ones at Banyan Treatment Centers locations. Certified Intervention Professionals (CIPs) and Certified National Drug and Alcohol Interventionists (CNDAI) have a minimal amount of education or experience.

While these individuals are not licensed, they are certified and do have work experience and education. Additionally, an interventionist may also have other licensed credentials, meaning a licensed counselor could also be an intervention specialist.

Addiction Counselors

Substance abuse counselors are also important partners in a client’s treatment plan. They are the patient’s support system, adviser, and teacher, offering them guidance throughout the entire recovery process.

Other names for addiction counselors include substance use disorder counselors, alcohol and drug counselors, and chemical dependency professionals. They must have a state license, and licensed counselors normally have an associate’s degree, bachelor’s degree, or master’s degree.

Certified addiction counselors must also meet certain education and work experience criteria. Advanced Alcohol and Drug Counselors (AADC) and Master Addiction Counselors (MAC) have master’s degrees, and some states may also require certification.

Addiction Psychiatrist Specialist

An addiction psychiatrist is a medical doctor who specializes in addiction medicine. These psychiatrists address both physical and mental aspects of clients’ mental health and substance use disorders.

Addiction psychiatrists are especially beneficial for patients with co-occurring disorders. Addiction psychiatrists need licenses, certifications, and experience.

Education for this group includes a Doctor of Medicine degree (MD) or Doctor of Osteopathic Medicine (DO) as well as certifications from the American Board of Psychiatry and Neurology (ABPN).

Registered Nurse (RN)

A Registered Nurse (RN) is a nurse who has graduated from a nursing program and has met the requirements outlined by a country, state, or similar government-authorized body to obtain a nursing license. Banyan locations have RNs on staff to provide patients with direct care for drug and alcohol use disorders.

Our RNs assist our addiction physicians in developing treatment plans, performing client assessments, monitoring clients’ progress, and administering medication and pain management treatment. Our RNs play an essential role in ensuring patient safety, health, and progress through PHP and inpatient care.

Advanced Registered Nurse Practitioner (ARNP)

An Advanced Registered Nurse Practitioner (ARNP) is a registered nurse who completed graduate-level education and has the primary responsibility of caring for the patient. The roles of licensed ARNPs include:

  • Examining patients and establishing diagnoses according to client history, physical examination, and other forms of care
  • Admitting, managing, and discharging patients to and from health care centers
  • Ordering, collecting, performing, and interpreting diagnostic examinations
  • Managing health care by identifying, developing, implementing, and evaluating a care plan for the individual
  • Prescribing therapies and medical equipment for treatment
  • Prescribing medications, when necessary

Substance abuse nurse practitioners offer addiction recovery medical services to treat clients in our facilities. Nurses on our staff have a combination of advanced degrees and certifications in mental health and substance abuse nursing to ensure our clients receive the best care possible. 

Psychiatric ARNP

Also referred to as psychiatric mental health nurse practitioners, some of our mental health and addiction treatment centers also have psychiatric ARNPs on staff to provide both psychopharmaceutical and psychotherapeutic care to clients and families. This means that they can prescribe medications to clients and provide therapy. Considering how often addiction is tied to mental illness, our psychiatric nurses play a crucial role in our mental health and addiction treatment services.

Medical Director

Medical directors have years of experience managing health care facilities. Their qualifications must address the various responsibilities of the role.

Like other addiction treatment facilities, Banyan involves a hierarchy of professional addiction specialists in leadership roles. At the top of this hierarchy is the medical director (MD).

Our medical director provides oversight on all our facilities’ medical-related duties. They ensure that all medical staff members follow guidelines, protocol, and provide high-quality care to clients while ensuring their team members’ needs are being met.

Typical roles of a medical director in addiction treatment include:

  • Enforcing an environment in which medical professionals can safely and effectively work
  • Developing policies and protocols that match the health care institution’s guidelines to ensure client safety and treatment efficacy
  • Supervising and evaluating medical staff operations
  • Working with institutional leadership to meet the health care system’s goals
  • Staying up-to-date on the latest medical advancements and changes through continuing education
  • Managing all medical departments of their facility
  • Ensuring that medical staff members meet institutional expectations, including certifications
  • Recruiting and managing medical team members

Meet Banyan’s Medical Addiction Specialists

Now that you know a little more about their specific roles, meet some of the incredible men and women on the Banyan team who help those struggling with addiction and mental illness.

Dr. Darrin | Chief Medical Officer

Dr. Darrin Mangiacarne graduated from the Philadelphia College of Osteopathic Medicine (PCOM). He received his master’s degree in Public Health from the University of Southern Mississippi and completed his family medicine residency at St. Luke’s Hospital in Bethlehem, PA. Darrin became the second addiction medicine fellow at Geisinger Health System. He is a Certified Physician Executive and a Medical Review Officer.

Dr. Mangiacarne is board certified in family medicine from the American Osteopathic Board of Family Physicians (AOBFP) and addiction medicine from the American Board of Preventive Medicine (ABPM) and (AOBFP). He is a Distinguished Fellow of the American Society of Addiction Medicine (DFASAM) and a fellow of the American Osteopathic Academy of Addiction Medicine (FAOAAM). He also currently holds the title of Secretary/Treasurer for the American Osteopathic Academy of Addiction Medicine.

Dr. Mangiacarne has worked in the addiction field for the past 11 years in both inpatient and outpatient settings. He co-chaired the Indiana Attorney General’s Task Force on addiction. Dr. Mangiacarne is the Past-President of the Indiana Society of Addiction Medicine. Before joining Banyan, he served as the Regional Medical Director for another program, overseeing their medication-assisted treatment programming throughout the Midwest. He is the Chief Medical Officer and a proud addition to the Banyan team.

Danielle Menendez | National Director of Nursing

Danielle Menendez is a Florida native, born and raised in Miami. Danielle moved to the Martin County area in 1997. Danielle’s career began as a BHT (Behavioral Health Technician) in an all-male mental health prison. It was there that Danielle found her passion for helping people, especially those with dual diagnoses. She decided to obtain her nursing license to further her education to combat the Substance Abuse epidemic. After obtaining her L.P.N., Danielle began working for a detox facility. A year later, Danielle decided to become an R.N.

Danielle began her career with Banyan in Downtown Stuart as the Director of Nursing for our Detox. She has built a dynamic nursing department with nurses from various medical backgrounds, from the ER to Mental Health specialties, to offer our clients the most caring and knowledgeable nursing staff possible.

Danielle plans to continue her schooling shortly. She plans to obtain her master’s degree in nursing and become a Nurse Practitioner.

Joan Morris | Psychiatric Advanced Registered Nurse Practitioner Boca

Joan was born in New York and later relocated to Boca Raton, FL. She received her Psychiatric Nurse Practitioner certificate at Florida Atlantic University. Joanne began working in the addiction field because she noticed how it was destroying the community around her, and she wanted to make a difference in the lives of her patients. As a medical provider, she recognized how a patient needs a holistic approach to attain their optimal level of health and wellness. Joan is dedicated to caring for each patient as an individual.

Heidi Wagner, APN, FNP-BC | Nurse Practitioner Heartland

Linda Santiago | Director of Nursing Palm Springs

Linda Santiago is a California resident, born and raised in the San Fernando Valley. While a student at Mission College, she volunteered for a suicide prevention hotline. It was here that she realized her passion for working in the mental health field. After finishing nursing school, she began working at a Dual Diagnosis facility, it was here that she identified her passion for working with people with not only mental health but substance abuse as well. Linda has been in supervisory positions since 2012 and thrives in leading teams towards high standards of quality patient care.

Linda offers nursing educational groups where they discuss unique ways to engage patients’ interests such as jeopardy/trivia and role-playing games. Linda finds creative and fun ways to educate patients and engage staff morale. Linda has been dedicated to the field of dual diagnosis for most of her career and continues to place top priority on patient care.

Linda joined the Banyan Palm Springs Team in August 2020 and looks forward to further developing and strengthening our nursing department. Our goal is to create a department dedicated to the care and compassion of the patients we serve.

keerthy sunder

Keerthy Sunder, MD | Medical Director Palm Springs

Dr. Keerthy Sunder, MD is an accomplished Physician with extensive experience as a clinician, researcher, administrator, teacher, and lecturer. He is also the author of the Amazon International Best Seller book “Face your Addictions and Save your Life” and the creator of an online meditation program for health and wellness ( and for PTSD among returning war Veterans (

Dr. Sunder holds Diplomates from the American Board of Psychiatry and Neurology and the American Board of Addiction Medicine. He is also a Diplomate of the Royal College of Obstetricians and Gynecologists in London, England, and certified as a Credentialed Menopause Practitioner by the North American Menopause Society. He served his Ob/Gyn residency at James Cook University Hospital in England. He served his Psychiatry residency at the University of Bristol, England as well as Western Psychiatric Institute and Clinic at the University of Pittsburgh Medical Center in Pennsylvania. He is a Distinguished Fellow of the American Psychiatric Association, a Member of the Credentialing Committee for the American Board of Addiction Medicine, and a Life Member of the Academy of Integrative Health and Medicine.

He is currently in Clinical Faculty with the Department of Psychiatry, University of Riverside School of Medicine, and an Adjunct Professor at Southern California University of Health Sciences. He has worked as an Investigator on over 30 Research Protocols focused on Schizophrenia, Bipolar disorder, Major Depressive Disorder, and substance use disorders, as well as a Research Psychiatrist or Co-Investigator on NIH studies related to Pregnancy and Postpartum disorders.

Dr. Sunder has obtained extensive training in the practice of Mind-Body medicine and Integrative approaches including Meditation, Neurofeedback, and NuCalm to address health and wellness. The “Sunder Method” is at the forefront of utilizing cutting-edge diagnostic tools, brain mapping, and sophisticated technology including custom smart nutraceuticals to assist with healing complex Neuropsychiatric Conditions, Gut-Brain Dysregulation, and optimize human performance.

Xiomara Jimenez | Nurse Practitioner Banyan Philadelphia

Xiomara Jimenez was born and raised in Philadelphia, PA with a Puerto Rican background. She received a Bachelor’s degree in nursing at Temple University in 2008 and later received her Master’s from La Salle University in 2018. Although Xiomara has not first-handedly been affected by drug abuse, she has witnessed the effects it has had on the lives of both friends and family. Xiomara began her career as a Nurse Practitioner working in PHP and IOP level of care for substance use disorders, while simultaneously running a Sub Oxone maintenance program.

She then went on to help women and children who suffered from mental health and substance use disorders. Growing up in North Philadelphia, she witnessed the destruction drugs and alcohol had on the community as well as the impact it had on the families involved and believed that one helping hand could provide the necessary courage and make all the difference in an individual’s life.

Gloria Callow | Director of Nursing Stuart

Gloria is a nurse and a New York native who relocated to martin County in 2016. She has been a part of the Stuart nursing team since it opened its doors in 2016. She has been a nurse for over 10 years with experience in the surgery trauma field, burns, pediatrics, and dermatology. Gloria is currently furthering her education to acquire her Bachelor of Science in Nursing. Her goal is to continue her growth within the Banyan company and to fulfill her passion for helping the needed community in their recovery process. During her free time, she enjoys spending time with her 13-year-old son Anthony and their family at the beach, the movies, and traveling.

Want to Join The Banyan Team?

If you’re passionate about helping people recover from addiction and mental illness, you could be just what our team needs. If you’re interested in getting hired in the addiction treatment field, check out our addiction recovery jobs here to learn more about the available positions at our Banyan drug rehab locations.


If you’d like to learn more about our addiction treatment services or have any other questions about our facilities, contact Banyan Treatment Centers now.


Most Insurance Plans Accepted

At Banyan, our goal is to make sure that anyone who needs treatment from drug and alcohol addiction are able to get the help needed to assist them on the road to recovery. If you don't have insurance contact us to inquire about alternate methods regarding treatment for yourself or a loved one.

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