Welcome to All Dermis Medical and Cosmetic Dermatology

Recognized by Castle Connolly as One of America’s Top Doctors

From Harvard to NYC, Manhattan’s best dermatologist is now in the heart of midtown. Email or book online today.

We Are a Full-Service Dermatology Practice

Preventive Screening

Whether you have a history of skin cancer in your family or not, it is important to visit us for an annual skin exam. Skin cancer is common, but highly treatable when detected early.

Proactive Treatment

As the body’s largest organ, skin can act up on even the healthiest among us. If you are struggling with acne, eczema, psoriais, or other dermatologic challenges, we can help.

Premium Aesthetics

Many of us want how we look on the outside to match how young we feel on the inside. From Botox to filler to PRP, we help provide a subtle, youthful boost to women and men alike.

Comprehensive Services

Healing Your Skin


Acne is the most frequent skin condition seen by medical professionals.


We provide more comprehensive analysis and care than your typical OTC products.


A medical condition that causes excessive sweating. Let us help you reduce symptoms.

Alopecia Areata

When the body attacks its own hair follicles, causing hair loss anywhere on the body.


A group of conditions that causes inflamed, irritated, and often itchy skin.


Patches and spots that appear on women’s skin, typically the face during pregnancy.


Relaxes muscles to smooth fine lines and wrinkles across multiple facial areas.

Female Hair Loss

Our treatments can prevent hair loss from worsening and help women regrow their hair.


We know how frustrating and uncomfortable psoriasis can be, and have the training to help.

Comprehensive Services

Investing in Your Skin

About Us

Meet Dr. Derek Chan

Dr. Derek Chan received his A.B. with honors from Harvard University and later earned a joint M.D. and Ph.D. degree at Boston University School of Medicine. As a fellow of the American Academy of Dermatology and a dermatologist certified by the American Board of Dermatology, Dr. Chan has expertise in both medical and cosmetic dermatology. In 2022 he was selected by Castle Connolly as one of the country’s top dermatologists, an honor reserved for only the top 7% of physicians. 

Dr. Chan has previously served as an ad hoc reviewer for Archives of Dermatology and Clinical Cancer Research. He has spoken at several national and international meetings and is published in a number of peer-reviewed journals, including JAMA Dermatology and the Journal of the American Academy of Dermatology. Dr. Chan has also been featured in mass media print and online publications, including Bustle, Prevention.com, and Daily Mail. He resides in Manhattan with his wife and two children.

Accepting New Patients

First Time Patient? Welcome.

Here are a few helpful resources to get you started with our dermatology practice.

New Patient Forms

We get it; no one loves excessive paperwork. That’s why we’ve streamlined the process for you to complete necessary forms online, in advance. It’s just another way to make your visit smoother.

Prepare for Your Visit

Please come prepared to discuss not only your current skin health concerns, but also any relevant family history as well as medications you may be taking. This information helps guide our team to provide you with the best care.