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.
Where can you see the aurora borealis? The aurora borealis is normally only visible from within 20 degrees of latitude of the North Pole. In North America, most viewing opportunities are limited to those in Alaska or the extreme northern parts of Canada. However, solar flares and geomagnetic activity can vastly increase the size of the aurora borealis, making its lights much more active and visible to much of the United States.