The subject index to Legacies lists additional topics under “Medicine and Health Care.” One mentioned is the Linz Award, which Dr. Carrell was awarded in 1925. He was only the second person to receive the award, “given annually to the citizen of Dallas who has made the greatest contribution to the community in the preceding year.” You can see the beautiful award on display in the Medical Library's Historical Collection.
An article from the Baylor University Medical Center Proceedings also mentions Dr. Carrell (and Dr. Brandon Carrell) as early orthopaedic surgeons on their staff.
Websites referenced
http://texashistory.unt.edu/ark:/67531/metapth35114/m1/26/
http://texashistory.unt.edu/
http://www.library.unt.edu/
http://dallasheritagevillage.org/wp-content/uploads/2015/06/Legacies-General-Subject-Index-May2015.pdf
http://dallasheritagevillage.org/wp-content/uploads/2015/06/Legacies-Author-Index-May2015.pdf
http://texashistory.unt.edu/ark:/67531/metapth35101/m1/39
https://www.jld.net/linz/
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1305830/
index link updated 12-30-2015