Is R42 a billable ICD-10-CM code?

Yes. R42 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does R42 sit in the tabular list?

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Symptoms and signs involving cognition, perception, emotional state and behavior (R40-R46).

What cannot be coded together with R42?

R42 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

R42

R42 — Dizziness and giddiness

Billable / specific codeICD-10-CM

R42 is a billable, specific ICD-10-CM code for dizziness and giddiness. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

vertiginous syndromes (H81.-)
vertigo from infrasound (T75.23)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Light-headedness
Vertigo NOS

Other codes that can never be billed with R42

These codes carry an Excludes1 note pointing at R42. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading R42 alone.

R27Other lack of coordination
T75.23Vertigo from infrasound
H81Disorders of vestibular function
T75.23XAVertigo from infrasound, initial encounter
T75.23XDVertigo from infrasound, subsequent encounter
T75.23XSVertigo from infrasound, sequela

Risk adjustment

R42 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

R42 is named in 30 Medicare coverage policies — 30 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A53057Billing and Coding: Home Health Occupational Therapy
A53058Billing and Coding: Home Health Physical Therapy
A53064Billing and Coding: Outpatient Occupational Therapy
A53065Billing and Coding: Outpatient Physical Therapy

How R42 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to R42.

Dizziness
Dysequilibrium
Giddiness
Swimming in the head
Vertigo
Disturbance›equilibrium
Light›headedness
Syndrome›Mal de Debarquement

Questions about R42

Is R42 a billable ICD-10-CM code?: Yes. R42 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does R42 sit in the tabular list?: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Symptoms and signs involving cognition, perception, emotional state and behavior (R40-R46).
What cannot be coded together with R42?: R42 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.