ICD-10-CM 2027
ICD-10 code for giddiness
From the official ICD-10-CM alphabetic index entry “Giddiness”. Page updated September 29, 2026.
About coding giddiness
The ICD-10-CM code for giddiness is R42 (Dizziness and giddiness). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on R42.
Don't report R42 together with the conditions in its Excludes1 note: vertiginous syndromes (H81.-) and vertigo from infrasound (T75.23).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 149 (Dysequilibrium, relative weight 0.7527), in MDC 03 (Diseases and Disorders of the Ear, Nose, Mouth and Throat), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific giddiness codes (official index)
Don't confuse with (Excludes1 for R42)
Common questions about giddiness ICD-10 codes
What is the ICD-10 code for giddiness?
- R42 — Dizziness and giddiness. More specific codes apply when the documentation supports them: F44.89, F45.8.
What is the ICD-10 code for hysterical giddiness?
- F44.89 — Other dissociative and conversion disorders.
What is the ICD-10 code for psychogenic giddiness?
- F45.8 — Other somatoform disorders.
Is R42 billable?
- Yes. R42 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can R42 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict R42 as a principal diagnosis.
Is R42 a CC or MCC?
- No. R42 is neither a CC nor an MCC under MS-DRG v44.0.