2026 ICD-10-CM Diagnosis Code T70.0XXAOtitic barotrauma, initial encounter
T70.0XXA is a billable ICD-10-CM diagnosis code for otitic barotrauma, 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) and groups to MS-DRG 152 through 153. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Effect of other external causes, initial encounter.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Aural barotrauma of ascent
- Aural barotrauma of descent
- Barotitis externa
- Barotitis interna
- Barotrauma of descent
- Barotraumatic Eustachian tube dysfunction
- Cochlear barotrauma
- Cochlear trauma
- Dysfunction of eustachian tube
- Effects of air pressure
- Effects of high altitude on ears
- Injury of Eustachian tube
- Inner ear decompression injury
- Otitic barotrauma
- Otitic barotrauma of left ear
- Otitic barotrauma of right ear
- Traumatic injury of left middle ear
- Traumatic injury of right middle ear
- Vestibular barotrauma
- Vestibular trauma
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Effects of air pressure and water pressure (T70). 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.
Patient EducationClinical
Barotrauma
Barotrauma means injury to your body because of changes in barometric (air) or water pressure. One common type happens to your ear. A change in altitude may cause your ears to hurt. This can happen if you are flying in an airplane, driving in the mountains, or scuba diving.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert T70.0XXA to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T70.0XXAOverview
Is T70.0XXA (Otitic barotrauma) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report otitic barotrauma, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T70.0XXA mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for otitic barotrauma, such as an emergency visit or first evaluation.
What MS-DRG does T70.0XXA group to?
When otitic barotrauma, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 152, 153, with relative weights from 0.7382 to 1.1822 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of T70.0XXA?
Under the General Equivalence Mappings, otitic barotrauma, initial encounter converts to ICD-9-CM 993.0 (barotrauma, otitic). 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.
