A port wine stain is a congenital vascular birthmark caused by abnormally dilated capillaries within the skin. These lesions usually appear pink or red at birth and most commonly affect the face, neck, or extremities. As the blood vessels enlarge, port wine stains may darken, thicken, or develop surface texture changes. Because these changes are gradual, early evaluation plays an important role in long-term management.

World Renowned Expert in Port Wine Stain Treatment
Port wine birthmarks are congenital vascular lesions that often thicken and darken over time. Dr. Geronemus is arguably the world’s most experienced physician in the treatment of port wine stains, having developed many of the techniques and protocols that are used today. It is widely acknowledged that his work in infants and children has transformed the field.
World-Renowned Results
Expert Solutions for Complex Birthmarks
Birthmarks vary in size, depth, and color, and extend beyond just port wine stains. A careful evaluation guides effective, individualized treatment planning.

Progressive Port Wine Stains
Birthmarks that darken or thicken with age.

Mature Port Wine Birthmarks
Port wine stains in adults requires special consideration as they thicken and darken. Dr. Geronemus has developed novel techniques with up to date technology to treat these birthmarks often using more than one device.

Nevus of Ota/Ito

Epidermal Nevi
Epidermal nevi are benign overgrowths of the skin that often appear as thickened, textured patches and may become more pronounced over time. Dr. Geronemus utilizes advanced laser technologies and tailored treatment plans to improve the appearance of these lesions, often combining multiple modalities to achieve smoother, more even-looking skin while minimizing impact on surrounding tissue.

Pediatric Port Wine Stains
Dr. Geronemus specializes and has advanced the field of port wine treatments in the pediatric population. He has pioneered and published extensively on his novel techniques which has changed the lives of thousands of newborns and young children.

Cafe au Lait Macules

The Geronemus Method for Birthmarks
We evaluate vessel depth, lesion color, skin tone, and patient age to determine the safest and most effective laser device.
Vbeam Pro
Targets superficial vessels and capillary-based vascular lesions by selectively treating hemoglobin to reduce visible redness.
Vbeam Prima
Allows adjustable spot sizes and pulse durations to treat a broader range of vascular lesions with controlled energy delivery.
Excel V
Useful for thicker “nodules” or “cobblestoning”.
ClearV
Useful for thicker “nodules” or “cobblestoning”.
Nd:YAG Laser
Addresses deeper or thicker vascular lesions by delivering energy to vessels beneath the skin’s surface.
Avava MIRIA Laser with Vbeam Pro or Prima
Dr. Geronemus has developed a technique combining these two lasers that adds benefit to resistant and thicker port wine stains.
In Good Hands
450 +
Publications on dermatology, including hundreds on laser treatment.
30 +
Years of experience with laser technology.
10000 +
Laser skin resurfacing treatments delivered.

The Experience of a Pioneer
With over 450 publications and a leading role in developing many of today’s laser devices and related technologies, Dr. Roy Geronemus offers a level of expertise rarely found in cosmetic dermatology and birthmark treatments. Dr. G performs all procedures, safely combining laser, injectable, and energy-based treatments when clinically appropriate.

Frequently Asked Questions
Children and adults with port wine stains may benefit from laser treatment. Early intervention often helps reduce progression, but adults with long-standing lesions can also see meaningful improvements. A consultation helps determine whether port wine stain birthmark treatment in NYC is appropriate based on the lesion depth, skin tone, location, and the patient’s overall skin health.
Vascular lasers deliver targeted energy that is absorbed by hemoglobin within the abnormal blood vessels. This energy causes the vessels to collapse while preserving surrounding skin structures. Treatment focuses on controlled, incremental improvements, rather than aggressive correction. This helps protect the skin and support consistent outcomes.
Yes. Without treatment, port wine stains often darken and may become thicker or develop nodular areas. Many patients pursue port wine stain birthmark treatment in NYC to address these progressive changes and maintain smoother, more even-toned skin over time.
Yes. Certain vascular lasers have a long history of safe use in pediatric patients. Dr. Geronemus carefully evaluates the child’s age, lesion characteristics, and timing to determine the most appropriate treatment approach.
Downtime varies depending on the technology Dr. G uses, but is typically minimal. Redness, swelling, or mild bruising may occur after treatment, but usually resolve within a few days. Most patients return to normal activities shortly after their session.






