Wiki Screening colonoscopys

Not sure what you are asking but when you are coding/billing for screening of any kind the screening V code is the first-listed code always. Any other dx not associated with the screening may be listed but do not link to the screening procedure code.
 
Correct Coding

Scenerio: V7651,56210,4556, cpt G0121, I have been billing G0121,V7651 leaving the other dx off the claim form
Is this correct coding?
Also is this the appropriate use of modifiers for this scenerio? Please advise.:
43235
43450-51,53
Thank you for your assistance.
 
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