ABN stands for Advanced Beneficiary Notification. An ABN must be signed prior to providing a Medicare service or test to document that the patient is willing to assume responsibility for payment of services that Medicare may not cover when subject to either National or Local Coverage Determinations (NCD) or (LCD).
Chinchillas are crepuscular (most active around dawn and dusk) rodents, slightly larger and more robust than ground squirrels. They are native to the Andes mountains in South America and live in colonies called  herds  at high elevations up to 4,270 m (14,000 ft).
Chinchillas have a long pregnancy and the gestation period is around 110 days. Birth usually occurs in the morning and the babies, known as kits, are born a few minutes apart. The kits are born with their eyes open, covered in fur, and weigh around 2 ounces.