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.
Travel To Alaska! About Our Northern Lights Adventure. Join us on our Northern Lights tour in Alaska! Get a dose of local culture by day, and by night look for and photograph the Aurora Borealis. Your local guides will provide the necessary wake up calls when the lights appear and help you capture the perfect photo.