Penn Psychiatry

Amber Calloway, Ph.D.
Director of TEAM Clinic

Assistant Professor of Psychiatry at the University of Pennsylvania’s Perelman School of Medicine
Licensed Clinical Psychologist

Amber Calloway, Ph.D (she/her) is the Director of the TEAM clinic, an Assistant Professor of Psychiatry at the University of Pennsylvania’s Perelman School of Medicine, and a licensed clinical psychologist. Dr. Calloway earned her Ph.D. from the University of Massachusetts Boston and completed her APA internship and a clinical postdoctoral fellowship at the Corporal Michael J. Crescenz VA Medical Center in Philadelphia, PA. She completed a postdoctoral fellowship at the Penn Collaborative for CBT and Implementation Science, where she continues to support increasing access to CBT and other evidence-based practices in under-resourced community settings through training and research. Dr. Calloway’s research and clinical work focuses on culturally responsive approaches to the implementation of CBT. She has worked with a broad range of clinical populations, in a range of clinical settings, including partial hospital programs, the VA hospital system, college counseling centers, and private practice. Dr. Calloway is committed to ensuring clients in the TEAM clinic receive high quality care informed by evidence-based interventions.

Paul Burkat, M.D., PhD
Medical Director of TEAM Clinic

Co-Medical Director of Outpatient Psychiatry Services
Associate Professor of Clinical Psychiatry
University of Pennsylvania Perelman School of Medicine

Dr. Burkat is a general adult Psychiatrist with additional certification in Addiction Medicine. He focuses primarily on the psychopharmacological management of mood, anxiety, and psychosis disorders. His research interest includes physiologically based pharmacokinetic and pharmacodynamic modeling of medications in clinical use and compounds associated with addiction. He is a member of the Society for Neuroscience, American Society for Pharmacology and Experimental Therapeutics, and the American College of Clinical Pharmacology.

Reid Mergler, M.D.
Psychiatrist

Dr. Mergler is a clinical psychiatrist at the Penn Center for Women’s Behavioral Wellness, who specializes in Reproductive Psychiatry and women’s mental health. She completed her adult psychiatry residency training at Tufts Medical Center in Boston in June 2023. She received her medical degree from the Albert Einstein College of Medicine and completed her first year of residency in Obstetrics and Gynecology at Montefiore Medical Center. She is the co-founder of the National Reproductive Psychiatry Trainee Interest Group, and she was awarded the Association of Women Psychiatrists Symonds Fellowship in 2021. She is an active member of the American Psychiatric Association Women’s Mental Health Committee, Marce of North America and the Association of Women Psychiatrists. She has a special interest in trauma-informed care, childbirth-related PTSD, polycystic ovary syndrome and perimenopause.

Katherine Ingram, MSN, CRNP, PMHNP-BC
Psychiatric Nurse Practitioner

Kate Ingram is a board certified psychiatric mental health nurse practitioner at Penn Medicine. She earned her MSN at the University of Pennsylvania School of Nursing in 2021. Prior to this, Kate worked as a registered nurse on a cardiac unit. Her clinical focus is primarily in psychopharmacologic treatment of mood and anxiety disorders as well as regular collaboration with psychotherapy providers.  Kate is also involved in the clinical supervision of nurse practitioner students at Penn Medicine.

Max Stern, MSN, CRNP, PMHNP-BC
Psychiatric Nurse Practitioner

Max Stern (he/him) is a Psychiatric Nurse Practitioner, having earned his Masters of Science in Nursing (MSN) in 2021 from the Mass General Hospital Institute of Health Professions (MGH IHP) in Boston, MA.  Prior to pursuing graduate training Max worked as a case manager - facilitating chronically unhoused individuals find homes around Philadelphia. Max continued his passion for community-based work while at the MGH IHP, completing his clinical rotations at the Boston Healthcare for the Homeless Project and the South End Community Health Center. While pursuing his MSN, Max worked as a registered nurse on the Short Term Unit at McLean Hospital in Belmont, MA; where he facilitated patients in overcoming crisis and developing new coping skills. Max’s combined experiences in community and inpatient settings have fostered a collaborative clinical style, one that values shared decision making with clients. Additionally, Max works to explore the range of contributors to mental health disorders, including social determinants (eg housing, access to health care, experience of racism), medical diagnoses, social and family history to guide selection of appropriate psychopharmacological and behavioral treatment regimens.  In his free time Max enjoys biking, camping, and reading. 

Chris Chianese, MSN, CRNP, PMHNP-BC
Psychiatric Nurse Practitioner

Chris Chianese is a board certified psychiatric mental health nurse practitioner at Penn Medicine. He earned his MSN at the University of Pennsylvania School of Nursing in 2024. Prior to this, Chris worked as a clinical research nurse at the University of Pennsylvania Perelman School of Medicine in the HIV prevention research division. Here, he worked on clinical trials exploring the safety and efficacy of numerous biomedical interventions for the prevention of HIV, Covid-19, and other infectious diseases. Prior to becoming a nurse, Chris was the project director of biomedical research at Fenway Health located in Boston, Massachusetts.  His clinical focus is primarily in psychopharmacologic treatment of mood and anxiety disorders as well as regular collaboration with providers of psychotherapy. Chris has additional interests in sexual health, LGBTQ+ health, and addressing health care disparities amongst underserved populations.

Karyn Kollonige, MSN, CRNP, PMHNP-BC
Psychiatric Nurse Practitioner

Karyn Kollonige (she/her) is a Psychiatric Nurse Practitioner who earned her Master of Science in Nursing (MSN) from La Salle University in 2023. Before pursuing graduate training, Karyn worked in the Heart and Vascular Surgical Intensive Care Unit at the Hospital of the University of Pennsylvania, where she developed expertise in managing acute crises, staying calm under pressure, and applying advanced medication management. Her experience also strengthened her skills in therapeutic communication, de-escalation techniques, trauma-informed care, and interdisciplinary collaboration—all of which shape her holistic approach to psychiatric care.  

Following graduation, Karyn worked in private practice psychiatry, treating patients with a range of mental health diagnoses. She is now excited to rejoin Penn Medicine as a nurse practitioner, bringing her passion for compassionate, patient-centered care. Outside of work, Karyn enjoys spending time with her kids, partner, family, and friends. She loves to travel, with a particular passion for Disney.

Marisha DiCrecchio, MSN, CRNP, PMHNP-BC
Psychiatric Nurse Practitioner

Marisha DiCrecchio is a board certified psychiatric mental health nurse practitioner at Penn Medicine. She earned her Master of Science (MSN) at La Salle University in 2024 specializing in psychiatric mental health. With over 18 years of clinical nursing experience at the Hospital of the University of Pennsylvania (HUP), Marisha brings a wealth of knowledge and expertise to the team. Her clinical focus is primarily on psychopharmacologic treatment of mood and anxiety disorders. Marisha’s experience has helped shape her compassionate approach to providing evidence-based client-centered care in a collaborative environment.  

Marissa Adamczyk, LPC

Marissa Adamczyk (she/her) is a Licensed Professional Counselor who earned her master’s degree in counseling from Arcadia University, with certificates in child and family therapy and trauma. Her experience includes providing therapy in both school and community mental health settings. Prior to joining the TEAMS Clinic, Marissa worked at a group outpatient practice, where she helped clients dealing with grief and loss, anxiety, trauma, depression, and interpersonal issues. Marissa is passionate about helping clients identify and leverage their own strengths to achieve their goals. She utilizes a collaborative, client-centered approach and draws from various modalities based on clients’ needs, including cognitive behavioral therapy (CBT), acceptance and commitment therapy (ACT), systems theory, and mindfulness-based stress reduction (MBSR).

Dana Charmoy, LCSW

Dana Charmoy (sher/her) is a Licensed Clinical Social Worker. Dana completed a double master’s program in clinical social work and human sexuality education through Widener University in 2009. She has had experience working with diverse populations and across the lifespan. Dana has experience in various environments including inpatient eating disorder unit, family based therapy, community mental health and private practice. Dana works from a person centered, strength based, and integrated approach looking at the person, family and community. Dana utilizes various modalities including Cognitive Behavioral Therapy, Relational Therapy, and Solution Focused Therapy. Dana has worked with adults, children and couples with depression, anxiety disorders, trauma, and attachment disorders.

Patrick Farrell, LPC

Patrick Farrell (he/him) is a Licensed Professional Counselor. He earned his MS after attending Thomas Jefferson University’s Community and Trauma Counseling Program in 2021. Since graduating, Patrick has worked with racially and culturally diverse populations of all ages experiencing anxiety, depression, psychosis, personality disorders, and trauma related stress. Patrick employs techniques derived from DBT, strength-based approaches, and person-centered therapy. He is also trained in Trauma-Sensitive Mindfulness, which aids his patients in finding a sense of safety and calm in their mind and body as they work in the therapeutic process. In 2017, Patrick graduated from Temple University with a BA in Jazz Performance and based on client needs, will utilize creative arts approaches in practice to assist in emotion processing. His therapeutic approach focuses on assisting the patient in achieving their most authentic means of being and moving throughout life.

Linnae Homza, LPC

Linnae Homza, LPC (she/her) is a Licensed Professional Counselor who graduated from the Philadelphia College of Osteopathic Medicine in 2017 with a Master of Science in Mental Health Counseling. Since becoming licensed in 2020, she has gained extensive experience in treating complex mental health conditions, including depression, anxiety, bipolar disorder, trauma, PTSD, and personality disorders. Her professional journey began at The Light Program's Partial Hospitalization Program (PHP), where she discovered her passion for group therapy with adult populations.

Linnae has progressively advanced into leadership roles, serving as a Lead Therapist in the Northeast Philadelphia PHP, where she was instrumental in developing and expanding the program. Most recently, Linnae served as a Clinical Supervisor and Outpatient Clinician at High Focus Centers in Radnor.

Utilizing a multifaceted therapeutic approach, Linnae integrates cognitive, affective, behavioral, and systemic interventions, such as CBT, DBT, and ACT. Her strongest therapeutic interest and passion lies in Dialectical Behavioral Therapy (DBT) techniques, focusing on teaching mindfulness, interpersonal effectiveness, distress tolerance, and emotion regulation skills. Her ultimate goal is to help individuals improve their relationships and behaviors, resolve trauma, develop self-acceptance, and create a life worth living.

Katelyn Kennedy, LCSW

Katelyn Kennedy (she/her) is a Licensed Clinical Social Worker and earned her MSW from Boston College in 2017 with a concentration in mental health and a certificate in Trauma. Katelyn’s focus during her time in Boston was working with older adolescents and adults on issues related to substance use, anxiety, depression, trauma, relationships, and overall health and wellness. Katelyn’s clinical work has been influenced by Cognitive Behavioral Therapy (CBT), Solution-Focused Therapy (SFT), and motivational enhancement. Katelyn approaches therapy with an emphasis on a strong therapeutic alliance to help empower clients to achieve their goals and improve their mental health and well-being.

Emily Lyons, LPC

Emily (she/her) is a Licensed Professional Counselor and earned her MA in Clinical-Counseling Psychology from LaSalle University in 2014. She has provided individual and group therapy in outpatient, residential, and PHP/IOP settings, primarily utilizing Cognitive Behavioral Therapy (CBT) and Motivational Interviewing (MI). Emily has also been certified in Recovery Oriented Cognitive Therapy (CT-R) from the Beck Institute. She has experience working with clients struggling with anxiety, depression, OCD, trauma, and psychosis. Her approach to treatment emphasizes the importance of a strong therapeutic alliance to collaboratively create change and improve quality of life.

Kathryn Rim, LCSW

Kathryn Rim is a Licensed Clinical Social Worker and earned her MSW degree in 2012 from Rutgers University.  Kathryn completed a post-graduate certificate course in CBT from Bryn Mawr School of Social Work in 2016 and completed EMDR level II training in 2017. Her experience includes working with older adults in a PACE program, seeing individual adult clients in private practice setting and working in an integrated behavioral health program in PCP offices. She has worked with clients who present with trauma, anxiety, depression, chronic pain/illness, grief and loss, perinatal mood disorders and postpartum depression/anxiety. Kathryn takes a strengths-based and client-centered approach and often utilizes CBT, mindfulness, and trauma-informed care when working with clients. She strongly believes in taking a collaborative approach to patient care with an emphasis on the therapeutic relationship.

Joshua Sarnecky, LCSW

Joshua Sarnecky (he/him) is a Licensed Clinical Social Worker and earned his MSW in 2016 at the University of Pennsylvania School of Social Policy and Practice. Joshua is certified in Cognitive Behavioral Therapy (CBT) and received formal training in Parent-Child Interaction Therapy (PCIT) at the University of Iowa. Joshua has worked with adults, adolescents, children, and families in school-based and community mental health settings in Pennsylvania and Iowa. Joshua has experience working with clients on the autism spectrum, individuals from the LGBTQ+ community, and other diverse groups. While utilizing cognitive and behavioral interventions with clients, Joshua approaches mental health from a strengths-based perspective and helps clients harness their own skills to overcome the challenges in their lives.

Steve Wadden, LCSW

Steve Wadden is a licensed clinical social worker. He received his Master’s in Social Work from the University of Pennsylvania in 2020. Prior to joining the TEAM clinic, Steve worked as an outpatient therapy provider at the Penn Center for Mental Health. He has experience working with adult clients to address a range of presenting issues, including depression, anxiety, substance use, complex trauma, and general life stressors. Steve draws from a range of modalities in his clinical work, including cognitive and behavioral approaches, person-centered therapy, motivational interviewing, and psychodynamic therapy. He believes that a therapist's most important job is to create an accepting and affirming space in which clients have the support that they need to work towards their mental health goals.

Lucy Warrington, LCSW

Lucy Warrington (she/her) is a Licensed Clinical Social Worker and earned her MSW in 2015 in clinical social work from Hunter College’s Silberman School of Social Work in New York City. Lucy received post-graduate training in Cognitive behavioral therapy (CBT) at the Beck Institute and as part of a post-master’s certificate program in Advanced Clinical Practice at NYU’s Silver School of Social Work. Lucy also completed post-graduate training in family therapy at the Ackerman Institute for the Family in NYC. Lucy has worked with children, adolescents, adults, families, and couples in her clinical practice. Lucy has worked with clients on presenting issues that include anxiety, depression, trauma, school/academic issues, and relationship problems. Her approach to providing therapy is collaborative and strengths-based. Lucy’s theoretical orientation to therapy is informed by psychodynamic training and systems theory, and by the theories that ground CBT and related types of therapies. Lucy tends to use CBT and more action-oriented therapies because she knows this kind of therapy has proven to be very effective and it fits well with a collaborative approach to therapy.

Kandice Witherspoon, LPC

Kandice Witherspoon is a Licensed Professional Counselor who earned her MS degree in 2005 from Springfield College, and earned an MA degree in 2011 from Waynesburg University. She has worked in a variety of areas in the mental health field in Pittsburgh, PA and Philadelphia PA; including hospitals, community agencies and private practice. Her theoretical orientation is strongly influenced by Cognitive Behavioral Therapy and Motivational Interviewing. She has worked with children, families, adolescents and adults from diverse populations and orientations. Kandice has four years experience of supervising masters' level clinicians within BHRS and outpatient settings. She earned a 2yr certificate in Cognitive Behavioral Therapy in partnership with Comhar and The Beck Institute. Kandice believes in patient-centered care and a collaborative approach to assist patients with becoming their best self.

Tiffany Sullivan, LPC

Tiffany is a Licensed Professional Counselor with a master’s degree in Community and Trauma Counseling from Thomas Jefferson University. She brings extensive experience providing individual, family, and group therapy across a variety of settings, including partial hospitalization programs, outpatient clinics, primary care practices and community-based environments.

Tiffany has worked with children, adolescents and adults, developing a broad understanding of the unique needs across the lifespan. She has training in Trauma-Focused Cognitive Behavioral Therapy (TF-CBT) and Eco-systemic Structural Family Therapy (ESFT). 

Tiffany is passionate about fostering a supportive environment where clients feel empowered to achieve personal goals. Her practice is grounded in a strength-based, and trauma-informed framework. One of her key areas of interest is exploring how early life experiences and thought patterns impact adult functioning and emotional well-being to incorporate into behavioral changes. Her therapeutic modalities include Cognitive Behavioral Therapy (CBT) and Relational Therapy.

Joseph Ebbinger, LCP

Joseph Ebbinger (he/him), is a licensed professional counselor who has worked in various clinical settings since 2022.  Joe has worked with a variety of populations across the lifespan, in settings ranging from community mental health, private practice, and partial hospitalization programs.  Joe is eager to learn about the full range of human experience and enjoys helping patients say what is necessary to resolve their concerns and live more satisfying lives.  Prior to working as a therapist, Joe received a master's degree in education and worked in various universities in the mid-Atlantic region.  Joe's approach to psychotherapy is collaborative, collegial, and relational, and he has a breadth and depth of experience working with CBT, DBT, client-centered, and brief psychodynamic approaches.

Meredith Kroener
Administrator Practice Operations

Meredith Kroener is a dynamic business leader, bold innovator, and calculated risk taker with a proven track record of transforming vision into results. With deep expertise across healthcare operations, strategic growth, and organizational development, Meredith consistently delivers forward-thinking solutions that drive efficiency, profitability, and meaningful impact.

Thriving in high-pressure environments, Meredith is energized by complexity and driven by a passion for solving the unknown variables that often define the most challenging projects. Her entrepreneurial mindset and fearless approach to leadership have earned her a reputation for building strong, high-performing teams and revitalizing underperforming systems. She has a unique ability to identify opportunities where others see limitations, positioning her as a catalyst for innovation in both startup and established healthcare settings.

Meredith holds a degree in Psychology from Cabrini University and completed specialized training in Nursing Home Administration through Penn State University. She is currently pursuing an Executive MBA at Temple University’s Fox School of Business, further sharpening her leadership and strategic decision-making skills.

Throughout her career, Meredith has launched successful initiatives, overhauled operations, and led transformative programs that modernize care delivery and business practices. She brings a rare blend of vision, precision, and agility—turning bold ideas into measurable success.

Danielle Perdunn
Associate Practice Manager

Danielle Perdunn (she/her) is an Associate Practice Manager for Penn Psychiatry with a passion for optimizing patient care and ensuring efficient clinic operations. With over a decade of experience in administrative work, Danielle is extremely knowledgeable in healthcare administration. Highly motivated and dedicated to fostering a positive patient experience, Danielle has demonstrated strong leadership and organizational skills in managing day-to-day operations. Recognized as an Access Champion by the Patient Access Collaborative, Danielle has consistently worked towards improving patient access to care and streamlining processes within the practice. With a commitment to excellence and a focus on both operational efficiency and patient satisfaction, Danielle continues to make a significant impact in the field of psychiatry.

Rosalyn Washington

As a Care Manager for the entire Penn Medicine Behavioral Health system the goal is to provide community resources, assistance with mypennmedcine access, and array of any other services that benefit patients. By providing compassion, addressing concerns, being a clinical support gives patients continuity of care in a therapeutic and professional environment.

As a graduate from Drexel University with a Bachelor of Science in Behavioral Counseling, and a minor in Addictions Rosalyn gained numerous skills that is implemented daily. Being employed in numerous human service arenas in Philadelphia and Maryland. Such as the Drug Treatment Court, the child welfare system, serving the Intellectual Disabilities population, the Health Department’s Prevention unit, and working within the Philadelphia Women’s Prison focused on maternal and child health issues. I am a trained Doula, Co-parenting/ Parenting facilitator, Life Skills instructor, Prenatal Instructor, and an Afterschool Instructor that used evidence-based curriculums, and assessment tools/screenings. Rosalyn is very passionate about assisting people by being inclusive and practicing mindfulness, while taking a holistic approach. Rosalyn is an advocate for others, takes initiative, has strong case management skills, collaborates with staff and is an invaluable asset.

Najla Ross-Green

Najla is a dedicated and experienced Medical Care Manager with a strong background in case management. Holding a Bachelor of Science degree in Psychology from Hampton University and a Master of Science degree in General Psychology from Purdue University, Najla brings a wealth of knowledge and expertise to the team.

Passionate about providing resources and driven by a commitment to excellence, Najla is known for her flexibility and willingness to go above and beyond the scope of work to ensure optimal patient care. With a keen ability to navigate complex cases and a compassionate approach, Najla consistently delivers outstanding support and guidance to clients.

In addition to her professional skills, Najla brings a collaborative spirit and innovative problem-solving abilities to the team. Their dedication to continuous improvement and patient advocacy makes them an invaluable asset to our organization.

Christiana Seymore, CSA
Clinical Service Associate

Patricia A. Jones, MA
Medical Assistant

Patricia Jones is a (RMA) Registered Medical Assistant/Phlebotomist. She has been a part of the health care field for over 40 years! And with The University of Penn Health Care system for over 22 years. In which during this time she has worn many hats, as a Life Coach, CPR Certified, Lead MA and worked in a variety of other healthcare settings including outpatient clinics Penn Internal Medicine, Pediatrics, OB Gyn, Podiatry and Surgery.

Patricia's duties include but are not limited to: Vital Signs, EKG’S, Ordering Supplies, daily MA Schedules, Stocking and maintaining supplies within exams rooms; replenishing required supplies from the supply room as needed throughout the workday, POCT, UDS as Ordered by Physicians, Medication Ordering and Pending for Authorization from Physicians, ICD – 9 Code Forms, DWO Forms and Assisting in
Minor Procedures.

Patricia is compassionate, experienced, dedicated and caring for patients of all ages and backgrounds she is passionate about providing high - quality Care to all her patient’s that she encounters daily.

Nicolette Macon-Reaves
Patient Service Coordinator

Nicolette Macon-Reaves is a dedicated Patient Service Coordinator with a decade of experience in administrative operations, including over 4 years in healthcare and hospital systems and 4 years in public service throughout Philadelphia. Nicolette plays a central role in managing daily operations, streamlining communication between staff and leadership, and ensuring an exceptional patient experience from intake to follow-up care.

Nicolette brings a strong understanding of medical billing, insurance verification, and EMR systems. Her ability to identify process improvements and support multidisciplinary teams contributes to the clinic’s smooth and compassionate care environment.

Currently pursuing her Bachelor of Science in Nursing at West Chester University of Pennsylvania, Nicolette has in depth knowledge in patient care and advocacy, healthcare administration, medical terminology, and public policy. Her passion lies in bridging administrative excellence with empathetic, patient-centered care.

Amaja Hayes
Patient Service Associate

Amaja Hayes is a dedicated and compassionate Patient Service Associate with a strong background in Public Health and experience in Maternal and Child Health with a Bachelors of Science in Public Health Degree from West Chester University of Pennsylvania.  Amaja brings a solid foundation in healthcare administration and an understanding of the importance of preventive care and community health initiatives.

Amaja is Driven by a commitment to improving healthcare outcomes and promoting wellness within the community, Amaja is eager to contribute her skills and expertise to the healthcare team. Amaja excels in providing compassionate support to patients, addressing their concerns, and ensuring they receive the highest quality of care. Amaja is adept at multitasking in fast-paced environments, maintaining accuracy and professionalism while managing diverse administrative tasks.