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.
How to See the Aurora. It takes a mixture of planning and luck to see the Northern Lights. The planning is covered by Salmon Berry Tours, folks whoâve put a lot of thought into just what makes an Alaska vacation satisfying.