R42 — Dizziness and giddiness
Is R42 billable?
Yes — R42 is billable for FY2027. R42 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. R42 may be submitted for encounters from October 1, 2026 through September 30, 2027.
R42 at a glance
| Code | R42 |
|---|---|
| Description | Dizziness and giddiness |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does R42 group to?
R42 sits in MDC 03 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 149Dysequilibriummedical
How is R42 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to R42. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Dizziness
- Dysequilibrium
- Giddiness
- Swimming in the head
- Vertigo
- Disturbance › equilibrium (s)
- Light › headedness
- Syndrome › Mal de Debarquement
Excludes1 — never code together
The conditions below can never be reported together with R42 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Inclusion terms
Alternative wording in documentation that is classified to R42.
- Light-headedness
- Vertigo NOS
Excludes2 — not included here — inherited from Chapter 18
The conditions below are not part of R42, but a patient may have both at the same time. When documentation supports it, R42 and the excluded code may both be reported.
Excludes2 — not included here — inherited from R40-R46
The conditions below are not part of R42, but a patient may have both at the same time. When documentation supports it, R42 and the excluded code may both be reported.
- symptoms and signs constituting part of a pattern of mental disorder (F01-F99)
How long has R42 existed?
R42 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
Which codes are confused with R42?
ICD-10-CM declares these codes mutually exclusive with R42 — exactly one of each pair can be correct for a given encounter.