Final answer:
Code 38205 is associated with the harvesting of hematopoietic stem cells from bone marrow, which are essential for bone marrow transplants and treating hematological diseases.
Step-by-step explanation:
The primary purpose of code 38205 is harvesting stem cells from bone marrow. Hematopoietic stem cells, which can differentiate into various types of blood cells, are found in bone marrow and can be harvested for medical procedures like bone marrow transplants. With advances in medical technology, direct sampling of bone marrow can often be avoided as stem cells can now be isolated from a sample of a patient's blood and later grown in culture utilizing hemopoietic growth factors. The harvesting process is essential for procedures such as bone marrow transplant and the treatment of various hematological diseases. Hematopoietic stem cells are preferred in certain therapeutic applications because they are not rejected by the body and have the potential to continuously replace blood cells that are lost due to age or illness.