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).
Size and Weight Chinchilla adults are about the same size as a small to medium-sized domesticated rabbit. On average a chinchilla is somewhere between 9-11 inches long not including the tail. On average, an adult male chinchilla weighs between 0.8 to - 1.1 lbs. The females are generally larger weighing in at up to 1.3 lbs. Life Expectancy A pet chinchillas can live 10-15 years with some living up to 20 years. That's a long time compared to a typical pet.