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 in Russia: Magic Show in the Arctic. 1  Explore main sights of mighty Moscow and cultural capital of Russia - Saint 2  [...] Stay on Kola Peninsula and hunt for Northern Lights. Our journey begins in 3  [...] Take in the beautiful cities of St Petersburg and Moscow before exploring deep [...]