2026 ICD-10-CM Diagnosis Code T75.1XXAUnspecified effects of drowning and nonfatal submersion, initial encounter
T75.1XXA is a billable ICD-10-CM diagnosis code for unspecified effects of drowning and nonfatal submersion, 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 922 through 923. Coders also document this condition as acute respiratory distress syndrome. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Effect of other external causes, initial encounter; External cause codes: drowning/submersion; initial encounter; and External cause codes: intent of injury, undetermined.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute respiratory distress syndrome
- Bathing cramp
- Effects of exposure to extreme temperature
- Hypothermia
- Immersion
- Immersion hypothermia
- Non-cardiogenic pulmonary edema
- Nonfatal submersion
- Postimmersion-submersion syndrome
- War injury, drowned in war operations
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
Epilepsy, Reflex
a subtype of epilepsy characterized by seizures that are consistently provoked by a certain specific stimulus. auditory, visual, and somatosensory stimuli as well as the acts of writing, reading, eating, and decision making are examples of events or activities that may induce seizure activity in affected individuals. (from neurol clin 1994 feb;12(1):57-8)Immersion
the placing of a body or a part thereof into a liquid.Immersion Foot
a condition of the feet produced by prolonged exposure of the feet to water. exposure for 48 hours or more to warm water causes tropical immersion foot or warm-water immersion foot common in vietnam where troops were exposed to prolonged or repeated wading in paddy fields or streams. trench foot results from prolonged exposure to cold, without actual freezing. it was common in trench warfare during world war i, when soldiers stood, sometimes for hours, in trenches with a few inches of cold water in them. (andrews' diseases of the skin, 8th ed, p27)
Patient EducationClinical
Drowning
People drown when they get too much water in their lungs. You can drown in as little as an inch or two of water. Babies can drown in a sink or bathtub. Preschoolers are most likely to drown in a swimming pool. People who have seizure disorders are also at risk in the water. Drowning can happen quickly and silently.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert T75.1XXA to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T75.1XXAOverview
Is T75.1XXA (Unspecified effects of drowning and nonfatal submersion) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified effects of drowning and nonfatal submersion, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T75.1XXA mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for unspecified effects of drowning and nonfatal submersion, such as an emergency visit or first evaluation.
What MS-DRG does T75.1XXA group to?
When unspecified effects of drowning and nonfatal submersion, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 922, 923, with relative weights from 1.0177 to 1.7494 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of T75.1XXA?
Under the General Equivalence Mappings, unspecified effects of drowning and nonfatal submersion, initial encounter converts to ICD-9-CM 994.1 (drowning/nonfatal submer). 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.
