| R85 | Abnormal findings in specimens from digestive organs and abdominal cavity | NON-BILLABLE CODE |
| R85.0 | Abnormal level of enzymes in specimens from digestive organs and abdominal cavity | BILLABLE CODE |
| R85.1 | Abnormal level of hormones in specimens from digestive organs and abdominal cavity | BILLABLE CODE |
| R85.2 | Abnormal level of other drugs, medicaments and biological substances in specimens from digestive organs and abdominal cavity | BILLABLE CODE |
| R85.3 | Abnormal level of substances chiefly nonmedicinal as to source in specimens from digestive organs and abdominal cavity | BILLABLE CODE |
| R85.4 | Abnormal immunological findings in specimens from digestive organs and abdominal cavity | BILLABLE CODE |
| R85.5 | Abnormal microbiological findings in specimens from digestive organs and abdominal cavity | BILLABLE CODE |
| R85.6 | Abnormal cytological findings in specimens from digestive organs and abdominal cavity | NON-BILLABLE CODE |
| R85.61 | Abnormal cytologic smear of anus | NON-BILLABLE CODE |
| R85.610 | Atypical squamous cells of undetermined significance on cytologic smear of anus (ASC-US) | BILLABLE CODE |
| R85.611 | Atypical squamous cells cannot exclude high grade squamous intraepithelial lesion on cytologic smear of anus (ASC-H) | BILLABLE CODE |
| R85.612 | Low grade squamous intraepithelial lesion on cytologic smear of anus (LGSIL) | BILLABLE CODE |
| R85.613 | High grade squamous intraepithelial lesion on cytologic smear of anus (HGSIL) | BILLABLE CODE |
| R85.614 | Cytologic evidence of malignancy on smear of anus | BILLABLE CODE |
| R85.615 | Unsatisfactory cytologic smear of anus | BILLABLE CODE |
| R85.616 | Satisfactory anal smear but lacking transformation zone | BILLABLE CODE |
| R85.618 | Other abnormal cytological findings on specimens from anus | BILLABLE CODE |
| R85.69 | Abnormal cytological findings in specimens from other digestive organs and abdominal cavity | BILLABLE CODE |
| R85.7 | Abnormal histological findings in specimens from digestive organs and abdominal cavity | BILLABLE CODE |
| R85.8 | Other abnormal findings in specimens from digestive organs and abdominal cavity | NON-BILLABLE CODE |
| R85.81 | Anal high risk human papillomavirus (HPV) DNA test positive | BILLABLE CODE |
| R85.82 | Anal low risk human papillomavirus (HPV) DNA test positive | BILLABLE CODE |
| R85.89 | Other abnormal findings in specimens from digestive organs and abdominal cavity | BILLABLE CODE |
| R85.9 | Unspecified abnormal finding in specimens from digestive organs and abdominal cavity | BILLABLE CODE |
