R85.61Abnormal cytologic smear of anus

R85.61 is the ICD-10-CM diagnosis code for abnormal cytologic smear of anus. It belongs to category R85 (abnormal findings in specimens from digestive organs and abdominal cavity), block R83-R89 (abnormal findings on examination of other body fluids, substances and tissues, without diagnosis) and chapter 18 (symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified). It is a header code, so it can't be reported by itself; one of its 9 subcodes must be used instead.

Within R85.6 (abnormal cytological findings in specimens from digestive organs and abdominal cavity), R85.61 is specifically for abnormal cytologic smear of anus. Related codes cover cytological findings in specimens from other digestive organs and abdominal cavity (R85.69).

To report this condition, pick the subcode that matches the documentation: R85.610 ((ASC-US)), R85.611 ((ASC-H)), R85.612 ((LGSIL)), R85.613 ((HGSIL)), R85.614 (anus), R85.615 (anus), R85.616 (zone), R85.618 (anus) and 1 more.

Don't report R85.61 together with the conditions in its Excludes1 note: abnormal cytological findings in specimens from other digestive organs and abdominal cavity (R85.69), carcinoma in situ of anus (histologically confirmed) (D01.3), anal intraepithelial neoplasia I [AIN I] (K62.82), anal intraepithelial neoplasia II [AIN II] (K62.82) and 3 more.

The conditions in its Excludes2 note aren't part of R85.61, but may be coded alongside it if the patient has both: anal high risk human papillomavirus (HPV) DNA test positive (R85.81) and anal low risk human papillomavirus (HPV) DNA test positive (R85.82).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.