In patients where full body treatment was not indicated, we have used a laser to target smaller areas. The only laser available for this was an excimer laser using 308nm wavelength light. This is in the recommended treatment range called Narrow Band UVB.

There has been experimental work for several years that a slightly different wavelength may be safer and work as well or better. That has resulted in brand new laser technology using 311nm light (still in the Narrow Band UVB range). This laser (Pallas) has been used successfully at UCLA for the past year and we are proud to say that we have the first available 311 laser in the US. Like the old excimer laser, treatments are covered by insurance in the same way-meaning it may or may not be covered for certain conditions or may require a prior authorization. Treatments are still done twice a week just like the old excimer laser.

Peter Jenkin, MD, FAAD, FRCPC
Board-Certified Dermatologist
Dermatology Associates of Seattle

Peter Jenkin, Clinic Director and Board-Certified Dermatologist at Dermatology Associates of Seattle is available for consultation. For scheduling and information, visit us at