R11.0 — Nausea
R11.0

What this code means
Nausea is the feeling of needing to vomit, recorded on its own without vomiting.
Also called: nausea, feeling sick.
When this code is used
Used for nausea.
Where it sits in ICD-10-CM
Code R11.0 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.
Related symptoms
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Frequently asked questions
What is ICD-10-CM code R11.0?
R11.0 is the ICD-10-CM diagnosis code for “Nausea”. Nausea is the feeling of needing to vomit, recorded on its own without vomiting.
When is code R11.0 used?
Used for nausea. 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.