ICD-10 R42
Billable / SpecificDizziness and giddiness
About ICD-10-CM R42
ICD-10-CM code R42 represents Dizziness and giddiness. This is a billable/specific code in the Symptoms, Signs, and Abnormal Findings chapter (block R42). The 2026 edition of ICD-10-CM R42 became effective on October 1, 2025.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under R42. Per CMS ICD-10-CM Tabular 2026.
- Light-headedness
- Vertigo NOS
Type 1 Excludes
Pure excludes, these codes can never be coded together with R42. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- vertiginous syndromes (H81.-)
- vertigo from infrasound (T75.23)
Medicare LCD Coverage for R42
Local Coverage Determinations (LCDs) from CMS MACs that list R42 as a covered diagnosis.
Showing top 10 of 669 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing R42.
2 Aetna
3 Cigna
5 Medicare
CPT Codes Commonly Billed with R42
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 99202 New patient office visit — fever, headache, abdominal pain, cough, dyspnea, fatigue, dizziness, limb pain, nausea, routine exam, URI, UTI, pharyngitis, otitis, chest pain, weight loss Primary Care
- 99203 New patient office visit — common complaints plus chronic conditions: HTN, diabetes, hyperlipidemia, asthma, GERD, back pain, migraine, tachycardia, prediabetes Primary Care
- 99212 Established patient — URI, UTI, pharyngitis, otitis, dermatitis, rash, viral infection, cellulitis, conjunctivitis, sinusitis, bronchitis, ankle sprain Primary Care
- 93880 Duplex carotid — stroke, TIA, carotid stenosis, cerebral atherosclerosis, syncope, migraine, dizziness, headache, family hx vascular disease Cardiology
- 70551 MRI brain without contrast — migraine, headache, encephalopathy, cognitive decline, MS, epilepsy, syncope, dizziness Radiology
- 99281 ED visit level 1 — fever, cough, URI, abdominal pain, dizziness, laceration, ankle sprain, nausea, minor injury Emergency Medicine
- 99283 ED visit level 3 — chest pain, dyspnea, pneumonia, UTI, forearm fracture, tibia fracture, syncope, GI bleed Emergency Medicine
Convert R42 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| R42 | 7804 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To R42
Other codes in section R40-R46 (Symptoms and signs involving cognition, perception, emotional state and behavior).
ICD-10 R42, Billing FAQ
Is ICD-10 code R42 billable? +
Yes, R42 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What other names or terms map to R42? +
ICD-10 R42 includes: Light-headedness; Vertigo NOS.
What codes are Type 1 Excludes for R42? +
Type 1 Excludes (never code together with R42): vertiginous syndromes (H81.-); vertigo from infrasound (T75.23)
What CPT codes are commonly billed with R42? +
Procedures frequently paired with R42 include: 99202, 99203, 99212, 93880, 70551.
What ICD-9 codes does R42 map to? +
Per CMS GEMs, R42 maps to ICD-9 codes: 7804. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on July 16, 2026.
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