Mark Zimmerman, MD

South County Psychiatry, Cranston, Rhode Island

  • 61Articles
  • 301KReads
  • 1999–2026Active
  • 59Collaborators
  • 878Citations

About

Mark Zimmerman, MD, is affiliated with South County Psychiatry in Cranston, Rhode Island. Since 1999, Zimmerman has published extensively on psychiatric topics including major depressive disorder, bipolar disorder, posttraumatic stress disorder, eating disorders, addiction, anxiety, and the impact of COVID-19 on psychiatric care. His work addresses diagnostic criteria, treatment response evaluation, and clinical challenges in diverse patient populations. Zimmerman frequently collaborates with colleagues such as Iwona Chelminski, Diane Young, and Michael A. Posternak.

Publications

JCP
How Many Criteria Should be Required to Define the DSM-5 Mixed Features Specifier in Depressed Patients?
Original Research

How Many Criteria Should be Required to Define the DSM-5 Mixed Features Specifier in Depressed Patients?

January 21, 2026

In a study of 459 depressed patients, results did not support lowering the DSM-5-TR diagnostic threshold for the mixed features specifier from 3 to 2 criteria.
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JCP
Lack of Generalizability of PTSD Treatment Trials: The Recent Brexpiprazole-Sertraline Trials as an Example
Original Research

Lack of Generalizability of PTSD Treatment Trials: The Recent Brexpiprazole-Sertraline Trials as an Example

November 26, 2025

In an outpatient psychiatry sample, nearly 95% of patients who want treatment for PTSD would not have qualified for the trials of brexpiprazole-sertraline for PTSD.
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JCP
Borderline Personality Disorder and Eating Disorders: The Role of Emotion Regulation
Original Research

Borderline Personality Disorder and Eating Disorders: The Role of Emotion Regulation

July 3, 2024

Deficits in emotion regulation significantly predicted borderline personality disorder (BPD). Although eating disorders were not significantly predicted by emotion regulation deficits, they did predict BPD diagnoses.
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JCP
Depression Treatment Response Beyond 50% Improvement
Original Research

Depression Treatment Response Beyond 50% Improvement

May 8, 2023

Although most depression treatment research focuses on symptom improvement, patients have additional treatment priorities, including functioning, coping ability, and quality of life.
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JCP
Psychiatric Diagnoses in Transgender and Gender Diverse Patients
Original Research

Psychiatric Diagnoses in Transgender and Gender Diverse Patients

September 26, 2022

This study drew on interviews of over 2,200 people to compare psychiatric diagnoses between transgender or gender diverse patients and cisgender patients presenting for psychiatric treatment.
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JCP
Positive Predictive Value
Commentary

Positive Predictive Value

August 24, 2022

In this Commentary, the author posits that knowledge about positive predictive value—the probability a person identified as ill by a screening test does indeed have the illness—is important for...
JCP
Psychiatric Patients Who Do Not Believe They Deserve to Get Better
Brief Report

Psychiatric Patients Who Do Not Believe They Deserve to Get Better

June 8, 2022

This study of 405 patients in a partial hospital program examined the prevalence of the belief of “undeservingness” (ie, that one does not deserve to be treated) and the...
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JCP
Should Blind Psychiatrists Be Paid Less?
Commentary

Should Blind Psychiatrists Be Paid Less?

May 23, 2022

Dr Zimmerman comments on a recent meta-analysis by Scott and colleagues on the use of video-based telehealth in treatment of PTSD.
JCP
Letter to the Editor

Telehealth Partial Hospital Level of Care and Borderline Personality Disorder: Reply to Renn et al

August 17, 2021

The authors reply to a letter by Renn et al regarding their recent study comparing the safety, effectiveness, and acceptability of telehealth and in-person partial hospital level of care.
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JCP
Commentary

Screening Tests Are Not Diagnostic

March 30, 2021

This commentary discusses a recent article on the use of electroconvulsive therapy for depressed patients with and without borderline personality disorder.
JCP
Original Research

Telehealth Treatment of Partial Hospital Patients

March 16, 2021

Because of COVID-19, much behavioral health care is now delivered virtually. Is this as effective as in-person treatment? Read the article to learn more.
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JCP
The Differential Diagnosis of MDD Versus BP
Academic Highlights

The Differential Diagnosis of MDD Versus BP

May 14, 2019

Given the similarity in clinical presentation between major depressive disorder (MDD) and the depressive episodes of bipolar disorder (BP), misdiagnoses occur too often. Read this Academic Highlights to learn...
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Physicians Postgraduate Press, Inc. (PPP) makes no warranties about the accuracy or completeness of any information published in The Journal of Clinical Psychiatry or other PPP materials, and disclaims liability for any use or non-use of that information. Clinicians should not rely solely on these materials and should exercise their own professional judgment when making patient care decisions on an individualized basis.

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