R87.610 — Atypical squamous cells of undetermined significance on cytologic smear of cervix (ASC-US)

R87.610

ICD-10 Chapter 18: Symptoms, Signs & Abnormal Findings — illustrative image — Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00–R99) — illustrative image

What this code means

ASC-US means atypical squamous cells of undetermined significance on a cervical screening smear: mildly abnormal cells of uncertain meaning.

Also called: asc-us, atypical squamous cells cervix.

When this code is used

Used for atypical squamous cells of undetermined significance on cytologic smear of cervix (ASC-US).

Where it sits in ICD-10-CM

Code R87.610 belongs to Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified, which covers codes R00–R99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Frequently asked questions

What is ICD-10-CM code R87.610?

R87.610 is the ICD-10-CM diagnosis code for “Atypical squamous cells of undetermined significance on cytologic smear of cervix (ASC-US)”. ASC-US means atypical squamous cells of undetermined significance on a cervical screening smear: mildly abnormal cells of uncertain meaning.

When is code R87.610 used?

Used for atypical squamous cells of undetermined significance on cytologic smear of cervix (ASC-US). It belongs to Chapter 18 of ICD-10-CM (Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.