1 J68.3 is a billable ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. 2  Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
Scientists believe that chickens evolved from the red jungle-fowl,  which, in turn, evolved from the more bird-like dinosaurs. Birds  seem to have originally been what is ca â¦ lled theropod dinosaurs,  in fact, and fossil evidence does show a relationship between birds  and these bird-like dinosaurs.hickens (Gallus domesticus) are known to be descendants of the famous Archaeopteryx from the Jurassic period.
Feduccia believes that birds were very widespread by that date, occupying a variety of habitats. He believes most of them died out with the dinosaurs, about 65 million years ago. The ancestors of all today's birds evolved later, he says, between 65 and 53 million years ago, independently of the dinosaurs. This is the big bang theory of birds.