Our Services
Mohs Micrographic Surgery

Dr Koh Hong Yi is a qualified dermatologic and Mohs micrographic surgeon. He was trained in Ninewells Hospital, Dundee, which is one of the largest Mohs surgery centre in the UK. Dr Koh established the Mohs micrographic surgery service at Singapore General Hospital (SGH). He currently performs Mohs surgery in his private practice, and also at SGH where he is a visiting consultant.

Our Services
Dermatologic Solutions

Our specialists provide a comprehensive range of dermatological treatments, personalized to suit your unique requirements.

At TSN Dermatology, we only recommend what we feel is necessary and most appropriate for your condition. Surgical and non-surgical treatment options will be shared for you to consider. Our fees are transparent, and you only pay for what you need.


Aesthetic dermatology is focused on restoring beauty to the skin, recreating a youthful appearance, and ultimately helping our patients feel happier and more confident in their own skin. At TSN Dermatology, we believe in listening empathetically to your concerns, and providing sincere recommendations on how to help you achieve a healthier look. We employ both […]


Our Singapore-based dermatologists have a wide breadth of experience, having trained in renowned centres such as the Massachusetts General Hospital (United States), St John’s Institute of Dermatology (United Kingdom) and Australia. Our specialists keep up to date with the latest developments in medical dermatology and are opinion leaders and invited speakers in their respective subspecialties.


Frequently Asked Questions

In Mohs surgery, skin tissue is removed layer by layer, and only tissue that has been affected by skin cancer is removed. This ensures minimal sacrifice of normal skin, resulting in a smaller wound and scar.

The way the removed tissue is processed is also different from traditional surgery using frozen section. The entire margin of a Mohs layer is examined completely by the Mohs surgeon, reducing the risk that any cancer cells are left behind in the body. This contrasts with traditional frozen section, where a sampling technique is employed and not all the removed tissue is examined for residual cancer cells.

Most insurance plans typically provide coverage for Mohs micrographic surgery when it is used to treat skin cancer. However, it is essential to check with your insurance provider and our surgeon to understand your specific coverage and any potential out-of-pocket costs.

No, there are several treatments available for skin cancer which provides patients with a range of options. Some of these options include excision, radiation therapy, and topical medications.

The decision on which treatment to pursue is influenced by factors like the type and stage of the cancer and your individual health considerations. As such, you have different paths to explore with your doctor or skin specialist when discussing your treatment plan.

Mohs micrographic surgery is generally not very painful. You will be under the care of a skilled surgeon who will administer local anaesthesia during the procedure, so you shouldn’t experience significant pain. Afterwards, you might have some mild discomfort, which is typically easily manageable with over-the-counter pain relievers. Your surgeon will ensure your comfort throughout the process.