2026 ICD-10-CM Diagnosis Code T75.3XXAMotion sickness, initial encounter
T75.3XXA is a billable ICD-10-CM diagnosis code for motion sickness, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Effect of other external causes, initial encounter; External cause codes: intent of injury, accidental/unintentional; and External cause codes: natural/environment; initial encounter.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Air sickness
- Car sickness
- Motion sickness
- Outer space sickness
- Sea sickness
- Train sickness
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Other and unspecified effects of other external causes (T75). Use the following options for the applicable episode of care:
- A - initial encounter
- D - subsequent encounter
- S - sequela
Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Motion Sickness
disorder caused by motion. it includes sea sickness, train sickness, roller coaster rides, rocking chair, hammock swing, car sickness, air sickness, or space motion sickness. symptoms include nausea, vomiting and/or dizziness.Space Motion Sickness
disorder characterized by nausea, vomiting, and dizziness, possibly in response to vestibular disorientation or fluid shifts associated with space flight. (from webster's new world dictionary)Car Sickness
a sensation of discomfort associated with ground travel; symptoms may include nausea, vomiting, dizziness or sweating.Sea Sickness
a sensation of discomfort associated with travel over water, which may include nausea, vomiting, dizziness, or sweating.Air Sickness
a sensation of discomfort associated with air travel that may include nausea, vomiting, dizziness, or sweating.
Patient EducationClinical
Motion Sickness
Motion sickness is a common problem in people traveling by car, train, airplanes, and especially boats. Anyone can get it, but it is more common in children, pregnant women, and people taking certain medicines. Motion sickness can start suddenly, with a queasy feeling and cold sweats.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert T75.3XXA to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T75.3XXAOverview
Is T75.3XXA (Motion sickness) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report motion sickness, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T75.3XXA mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for motion sickness, such as an emergency visit or first evaluation.
What is the ICD-9 equivalent of T75.3XXA?
Under the General Equivalence Mappings, motion sickness, initial encounter converts to ICD-9-CM 994.6 (motion sickness) and E903 (travel and motion). The mapping is approximate, so confirm the match fits the documentation.
Footnotes
[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.
