What patients are saying
Overall rating
4.60
Average wait time
4.88
Bedside manner
4.57
“Dr. Zimmerman was a great listener and was very empathetic in our first conversation. I'm looking forward to working with him.”
Leroy G.More than 1 year agoVideo visit
“The waiting room was very calming before the appointment. The building is very nice which also made it feel at ease”
Initials hiddenJuly 25, 2023
About Dr. Daniel Zimmerman
Focus areas
Adult Psychotherapy
Ketamine Treatment
Clientele seen
Young adults (18-24)
Individuals
Adults (25-64)
Couples
Seniors (65+)
Treatment approaches
Psychoanalytic
Identity
Gender
MaleEthnicity
White
Languages spoken
English
Getting to know Dr. Daniel Zimmerman
Acheron Psychiatry is a depth-oriented mental health practice in New York City offering personalized, integrative care for adults navigating complex emotional, psychological, and cognitive challenges.
We specialize in Ketamine-Assisted Psychotherapy (KAP), neurocognitive care, psychotherapy, group therapy, and trauma-informed treatments. Our work supports individuals experiencing depression, anxiety, trauma, attentional difficulties, chronic stress, and patterns that feel difficult to shift through traditional approaches alone.
At Acheron, ketamine is used as a facilitator of psychotherapy—not a standalone treatment. Our KAP program is designed for individuals who may feel stuck, have had limited success with prior care, or are seeking a deeper level of insight and emotional access. Treatment is carefully prepared, medically monitored, and paired with psychotherapy to support meaningful and lasting change.
We take a holistic approach that considers emotional life, cognition, relationships, and nervous system health. Our goal is not only symptom relief, but improved functioning, resilience, and long-term well-being.
Acheron Psychiatry was founded by Daniel Zimmerman, MD, a psychiatrist with extensive training and experience in academic medicine. Dr. Zimmerman earned his undergraduate degree from Yale University, his MD from Weill Cornell, and completed psychiatry training at Harvard-affiliated Massachusetts General Hospital and McLean Hospital.
What should a new client know about working with you?
At Acheron Psychiatry, clients are met with care that is thoughtful, collaborative, and tailored to their individual needs.
Our clinical services include neurocognitive treatment led by Amanda Sacks-Zimmerman, PhD, ABPP-CN, an associate professor of neuropsychology at Weill Cornell Medicine. Neurocognitive care focuses on understanding how stress, mental health conditions, and medical factors affect attention, memory, and overall functioning—and on building practical strategies to improve daily life through Cognitive Remediation Therapy (CRT).
We also offer advanced trauma treatment options, including EMDR-informed ketamine-assisted psychotherapy for individuals living with PTSD or trauma-related symptoms. This approach is structured, supportive, and designed to increase emotional safety, flexibility, and distress tolerance.
In addition to individual KAP, clients can participate in our integration groups, KAP groups, and experiential programs as structured, short-term offerings that complement the ongoing work they’re already doing in therapy with their current provider.
All ketamine is prescribed, dosed, and medically monitored in-house by our psychiatrist and founder, Dr. Daniel Zimmerman (Yale, Weill Cornell, Harvard/MGH–McLean). This allows therapists like me to provide preparation, therapeutic support during dosing, and depth-oriented integration within a safe and cohesive clinical model.
Clients often describe our work as both grounding and transformative. Whether someone is seeking symptom relief, cognitive support, trauma healing, or deeper personal growth, we aim to meet them with clarity, respect, and clinical expertise.
What is your typical process for working with clients?
Care at Acheron Psychiatry begins with a comprehensive evaluation to understand each client’s emotional, cognitive, and medical history. From there, treatment is collaboratively designed based on individual goals, needs, and readiness.
Depending on the service, sessions may include psychotherapy, neurocognitive skill-building, ketamine-assisted therapy with medical monitoring, or group-based work. We emphasize preparation, education, and integration—helping clients understand their experiences and apply insights meaningfully to daily life.
Our psychiatrists and therapists work within a cohesive team model, prioritizing safety, continuity of care, and thoughtful pacing. Many clients appreciate our balance of clinical rigor and human warmth.
As our practice continues to grow, we remain committed to creating an inclusive, supportive environment where individuals feel seen, respected, and supported throughout their healing process.
Is this doctor in your insurance network?
Enter your insurance carrier and plan
choose insurance
In-network insurances
Dr. Daniel Zimmerman has 50+ in-network plans.
Don’t see your insurance?
It’s common for mental health providers to be out-of-network. Many insurance plans offer out-of-network coverage, so you may get partially reimbursed. Learn more
Out-of-pocket fees and assistance
Office location
Dr. Daniel Zimmerman, MD also offers online video visits for patients
Education and background
Practice names
Hospital affiliations
- NYU Langone Health
Board certifications
- American Board of Psychiatry and Neurology
- Psychiatry (American Board of Psychiatry and Neurology)
Education and training
- Medical School - Cornell University, Doctor of Medicine
- Harvard University, Massachusetts General Hospital, McLean Hospital, Residency in Psychiatry
- New York University, Bellevue Hospital Center, Fellowship in Psychiatry
- Yale University (Bachelor's)
Professional memberships
- American Psychological Association
Awards and publications
- 2009 Thomas P. Hackett Award (for outstanding academic-research achievement during residency), Department of Psychiatry, Massachusetts General Hospital
- 2005 M.D. With Honors in Research, Weill Medical College of Cornell University
- 2005 Oskar Diethelm Prize for Excellence in Psychiatry, Weill Medical College of Cornell University
NPI number
1366578734
Patient reviews
All reviews have been submitted by patients after interacting with the practice.
Overall rating
4.60
Wait time
4.88
Bedside manner
4.57
Your trust is our top concern, so providers can't pay to alter or remove reviews. We also don't publish reviews that contain any private patient health information. Learn more here
122 reviews
Most relevant
Excellent psychiatrist! I am very happy to be his patient. I will go to Dr. Zimmerman for as long as he is in practice!
May 3, 2023Michael S.Verified patient
The waiting room was very calming before the appointment. The building is very nice which also made it feel at ease
July 25, 2023Initials hidden
We had technical difficulties with Zoom and it turned into a telephone call session for me.
May 26, 2023Nicholas F.Verified patientVideo visit
Dr Zimmermann was nice and polite. Looking forward to continuing my husband’s treatment with him.
November 13, 2023Richa S.Verified patient
Knowledgeable, approachable and compassionate. I had a very good experience with Dr Zimmerman.
January 18, 2024Initials hidden
Dr.Zimmerman was great! He really took the time to listen to your needs and was very informative.
June 21, 2023Joseph M.Verified patient
Dr. Zimmerman is kind and you can tell he cares about his patients.
May 3, 2023Kristen F.Verified patient
Very attentive and outstandingly nice and friendly!
June 8, 2023Anouer H.Verified patient
I had my first appointment at this clinic yesterday, and I was extremely disappointed. While the clinic itself is big and impressive, the service was completely unprofessional. Sitting in front of a professional who spent the most of the 50-minute session constantly yawning and biting his nails was incredibly unpleasant and borderline offensive. On top of that, he repeatedly brought up ketamine treatments, as if he was selling the product/services, while completely ignoring the reason I came to meet with him in the first place.
I left feeling frustrated and unheard. I will definitely not be returning.
February 18, 2026Roni O.Verified patient
The doctor gave the impression that this was a 1st session. It turns out it was not. His intention was to introduce the practice and refer me to another practitioner. It was a bit disingenuous. Other than this significant lack of communication, I found the doctor to be professional and attentive. As he was unwilling to accept responsibility for his lack of clarity I have chosen to seek treatment elsewhere.
Less than 1 year agoInitials hidden
Rather regrettable experience. Unprofessional & terrible listener. Probably too money minded & didn’t come across as genuine at all. Again a terrible terrible listener. He’d rather discuss politics than the the specifics of treatment; so he can push another appointment? Not focused or directed at all.
I was also pissed by the wasteful repetitiveness. I filled my full name, DOB, address etc online when booking the appointment. His office called me a week before appointment to have me repeat it on the phone again. Then I had to fill it in by hand again when I arrived at his office. Then the doctor in his chamber wanted me to repeat the info so he can type it in his notes. Really my full name & address?! And then he didn’t have enough time to discuss the dosage. What disrespect & waste of time.
April 24, 2024Initials hidden
10/10
January 12, 2024Sanya M.Verified patient
Dr. Zimmerman was a great listener and was very empathetic in our first conversation. I'm looking forward to working with him.
More than 1 year agoLeroy G.Verified patientVideo visit
Great experience.
December 19, 2023Leslie P.Verified patient
Very clean, organized, and professional
October 25, 2023Seth C.Verified patient
Wonderful
October 3, 2023Anita C.Verified patient
I would not recommend this practice. I went in for an initial consultation and never once was I asked about any symptoms that were bothersome. The intake interview was not guided at all and I left feeling like I missed covering things that were important to me because of the lack of structure/format. On top of that, Dr. Zimmerman at one point called a 6-month relationship that I mentioned just ended “not a real relationship,” and laughed multiple times during my intake interview. I don’t know if he was trying to empathize or felt uncomfortable but it did not sit well. Finally, despite knowing that I am already in regular therapy with a provider I love, the practice heavily pushed booking a therapy appointment with them in addition to a medication management follow up. I left with a prescription and a bad taste in my mouth, but no knowledge of a formal diagnosis.
More than 1 year agoInitials hidden
Dr. Zimmerman was great. Very easy to speak with, a great listener, and really helpful in helping me think about my long-term mental health treatment plan. Looking forward to starting my work with Acheron.
June 9, 2023Shannon F.Verified patient
I would highly recommend this doctor. Daniel Zimmerman stands out by maintaining a highly professional demeanor during meetings. Not only does he dress appropriately, but his office also exudes a comforting atmosphere. He demonstrates genuine concern by asking pertinent questions to gain a comprehensive understanding of the issues I am encountering. In contrast to some doctors I have encountered who ask trivial questions before addressing my actual concerns, Daniel Zimmerman prioritizes my well-being. I can feel that he possesses extensive expertise and experience in his field.
May 24, 2023Sungyeon P.Verified patient
Dr. Zimmerman made me feel at ease with his calm, kind demeanor and great bedside manner. I felt heard, and when he asked for clarification, it didn't feel judgmental. Meeting a psychiatrist for the first time is always nerve wracking, but overall I had a good experience.
More than 1 year agoAmos P.Verified patient
Dr Zimmerman seemed genuinely invested in my experience and curious about what I had to say. Much different from the “check box” experiences I’ve had with other doctors. Highly recommend
April 15, 2023Brianne M.Verified patient
1st appointment went great. Highly recommend.
More than 1 year agoInitials hidden
Dr. Zimmerman is insightful, respectful, and genuinely cares about the wellbeing of his patients. He combines expert knowledge of psychiatric medicine with the rigorous analysis of psychodynamic treatment. He answers emails within hours or even minutes and is always available in emergencies. I am a much healthier and more content person for having been his patient.
More than 1 year agoSM
Less than 1 month agoInitials hidden
Less than 3 months agoInitials hidden
Less than 6 months agoInitials hidden
December 10, 2025joseph B.Verified patientVideo visit
December 9, 2025Initials hiddenVideo visit
Less than 6 months agoInitials hiddenVideo visit
December 3, 2025Dmytro B.Verified patient
December 2, 2025Initials hiddenVideo visit
Less than 6 months agoInitials hidden
Less than 6 months agoInitials hidden
Less than 6 months agoInitials hidden
October 7, 2025James C.Verified patient
Less than 1 year agoInitials hidden
September 11, 2025Minyoung N.Verified patientVideo visit
Less than 1 year agoInitials hidden
Less than 1 year agoInitials hidden
Less than 1 year agoInitials hidden
Less than 1 year agoInitials hidden
July 23, 2025Anuj P.Verified patient
Less than 1 year agoInitials hidden
June 9, 2025Daniel H.Verified patient
Less than 1 year agoInitials hidden
More than 1 year agoInitials hidden
March 13, 2025Amanda M.Verified patient
More than 1 year agoInitials hidden
More than 1 year agoInitials hidden
More than 1 year agoInitials hidden
Loading...
How soon can I make an appointment with Dr. Daniel Zimmerman?
Generally, Dr. Daniel Zimmerman has appointments available on Zocdoc within 1 week. You can see Dr. Zimmerman's earliest availability on Zocdoc and make an appointment online.
Is Dr. Daniel Zimmerman accepting new patients?
Dr. Daniel Zimmerman generally accepts new patients on Zocdoc. You can see Dr. Zimmerman's earliest availability on Zocdoc and schedule an appointment online.
Does Dr. Daniel Zimmerman accept my insurance?
Choose your insurance plan to verify if Dr. Zimmerman is in-network.
Can I make an appointment with Dr. Daniel Zimmerman online?
Yes, you can make an appointment online with Dr. Zimmerman using Zocdoc. It’s simple, secure, and free.
Which hospital is Dr. Daniel Zimmerman affiliated with?
Dr. Daniel Zimmerman is affiliated with NYU Langone Health.
What practice does Dr. Daniel Zimmerman work with?
Dr. Daniel Zimmerman works with Acheron Psychiatry.
Where is Dr. Daniel Zimmerman's office located?
Dr. Daniel Zimmerman has 2 office locations in New York, view full addresses on Dr. Zimmerman's profile.
Which board certifications does Dr. Daniel Zimmerman have?
Dr. Daniel Zimmerman is certified by American Board of Psychiatry and Neurology and Psychiatry (American Board of Psychiatry and Neurology).
What are common reasons for patients to see Dr. Daniel Zimmerman?
Dr. Daniel Zimmerman frequently sees patients for Psychiatry Consultation, Psychotherapy, Psychotherapy Intake / Initial Visit, Sleep Problems, and Weight Loss Consultation. You can see other visit reasons for Dr. Daniel Zimmerman on their profile.
What languages does Dr. Daniel Zimmerman speak?
Dr. Daniel Zimmerman speaks English.
How do patients rate Dr. Daniel Zimmerman in reviews?
122 patients have reviewed Dr. Daniel Zimmerman. The overall rating for this doctor is 4.6/5. They have a 4.57/5 rating for bedside manner and a 4.88/5 rating for wait time. You can read individual reviews and ratings on their profile.