“What do you call a doctor who is on call 24/7?”/“An oncologist.”

An “oncologist” is someone who treats cancer patients; the name sounds like “on-call-ogist.” “Oncologist…..............A Doctor who is always on call” was posted on the newsgroup fido7.ru.english on February 6, 1999.
 
A riddle was posted on Reddit—Jokes on August 13, 2014:
     
Q: What kind of doctor is always on call?
A: An oncologist!

   
     
Wikipedia: Oncology
Oncology is a branch of medicine that deals with the prevention, diagnosis, and treatment of cancer. A medical professional who practices oncology is an oncologist. The name’s etymological origin is the Greek word ὄγκος (ónkos), meaning “tumor”, “volume” or “mass” and the word λόγος (logos), meaning “speech”.
         
Google Groups: fido7.ru.english
none
Vlad Vork
2/6/99
” ápÉÑ  : NETMAIL (NETMAIL)
From: “Mark Boatman”


Subject: Redneck medical terms
(...)
> >>>  Oncologist…..............A Doctor who is always on call.
 
Twitter     
Soen‏
@soen
I’d hate to be an emergency cancer surgeon, because then I’d be an on-call oncologist.
1:14 PM - 12 Nov 2008
 
Twitter
gnupate‏
@gnupate
“what kind of doctor gets paged the most?  an oncologist (on-call ogist).”
2:30 PM - 16 Mar 2009
 
Twitter
Marie Ginder‏
@dreamsoftomorow
So if Dr is on call, does that make him/her an oncallogist? (Oncologist)
8:07 PM - 7 Jan 2010
 
Reddit—Jokes
What kind of doctor is always on call?
submitted August 13, 2014 by generic_ghost
An oncologist!
     
Reddit—Jokes
What kind of doctor is always on call?
submitted March 15, 2015 by Rubly
An oncologist.
 
Google Groups: Oakwood Emergency Medicine Residents
What kind of doctor is always on call?
Joseph Klosterman Jr.
3/15/15
An oncologist….
 
Twitter
JazzHands‏
@BeethovensBook
Oncologist means the doctor is on call
1:10 AM - 30 Oct 2017
 
Twitter
keepingitcreel‏
@Keepingitcreel
Which doctor is always available? The oncologist!(Get it? On-Call ogist)
8:43 PM - 1 Nov 2017
 
Reddit—Jokes
What do you call a doctor who is on call 24/7?
submitted December 2, 2017 by whoniversereview
An oncologist.