Question: California Subscriber Answer: Code 57520 (Conization of cervix, with or without fulguration, with or without dilation and curettage ...) is a conization of the cervix just like 57522 but uses the laser or cold knife to do the procedure. Code 57500 (Biopsy of cervix, single or multiple, or local excision of lesion, with or without fulguration [separate procedure]) is simply a biopsy of the cervix by any method. Watch out: A conization is not a biopsy. A conization removes all of the endocervix, all of the transformation zone, and part or all of the endocervix. -- The answers for You Be the Coder and Reader Questions provided by Melanie Witt, RN, CPC, COBGC, MA, an ob-gyn coding expert based in Guadalupita, N.M.