R85.610 – Atypical squamous cells of undetermined significance on cytologic smear of anus (ASC-US)
ICD-10-CM 2027 diagnosis code · Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis
- Code
R85.610(claims format:R85610)- Description
- Atypical squamous cells of undetermined significance on cytologic smear of anus (ASC-US)
- Short description
- Atyp squam cell of undet signfc cyto smr anus (ASC-US)
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
- Block
- R83-R89 Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis
- Parent codes
- R85 › R85.6 › R85.61
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
R85 – Abnormal findings in specimens from digestive organs and abdominal cavity
- abnormal findings in peritoneal fluid
- abnormal findings in saliva
R85.61 – Abnormal cytologic smear of anus
- 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)
- anal intraepithelial neoplasia III [AIN III] (D01.3)
- dysplasia (mild) (moderate) of anus (histologically confirmed) (K62.82)
- severe dysplasia of anus (histologically confirmed) (D01.3)
Block R83-R89
- abnormal findings on antenatal screening of mother (O28.-)
- diagnostic abnormal findings classified elsewhere - see Alphabetical Index
Index terms for R85.610
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in R85.61
- R85.611 – Atypical squamous cells cannot exclude high grade squamous intraepithelial lesion on cytologic smear of anus (ASC-H)Billable
- R85.612 – Low grade squamous intraepithelial lesion on cytologic smear of anus (LGSIL)Billable
- R85.613 – High grade squamous intraepithelial lesion on cytologic smear of anus (HGSIL)Billable
- R85.614 – Cytologic evidence of malignancy on smear of anusBillable
- R85.615 – Unsatisfactory cytologic smear of anusBillable
- R85.616 – Satisfactory anal smear but lacking transformation zoneBillable
- R85.618 – Other abnormal cytological findings on specimens from anusBillable
- R85.619 – Unspecified abnormal cytological findings in specimens from anusBillable
Frequently asked questions
What is ICD-10 code R85.610?
R85.610 is the ICD-10-CM code for atypical squamous cells of undetermined significance on cytologic smear of anus (ASC-US), in the block R83-R89 (Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis).
Is R85.610 a billable code?
Yes. R85.610 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does R85.610 belong to?
It belongs to category R85 – Abnormal findings in specimens from digestive organs and abdominal cavity.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.