These are 5 position alpha-numeric codes comprising the d series. All other level II codes and descriptors are approved and maintained jointly by the alpha-numeric editorial panel (consisting of CMS, the Health Insurance Association of America, and the Blue Cross and Blue Shield Association).
Alaska: Although Alaska enjoys a high volume of aurora activity, its cruises are not often mentioned as northern lights cruises. During the Alaska cruise season, it's rarely dark enough for the lights to be visible.
Northern Lights Viewing. Alaska is one of the best places on earth to see the northern lights â colorful bands of light that dance in the dark night sky. Travelers from all over the world come to Alaska each winter to see this stunning display and take advantage of other winter experiences like snowmobiling, dog mushing, skiing, festivals and sporting events.