1 ICD-9-CM 840.3 is a billable medical code that can be used to indicate a diagnosis on a reimbursement claim, however, 840.3 should only be used for claims with a date of service on or before September 30, 2015. 2  For claims with a date of service on or after October 1, 2015, use an equivalent ICD-10-CM code (or codes).
The Interior (especially Fairbanks) and Far North regions are considered the best in Alaska for northern lights viewing, although the aurora can be spotted anywhere in Alaska.
Here is a post on exactly this subject http://www.northernlightsiceland.com/best-place-to-see-northern-lights/ In general you can see the lights anywhere in Iceland, however there are couple of factors that are important to look at.nfortunately the Aurora Borealis isn't that predictable, having spent 5 weeks in Iceland and about 4 years in total in Norway, Sweden and Finland, the best time to see this phenomenen is obviously ONLY at night.