2026 ICD-10-CM Diagnosis Code T75.00XSUnspecified effects of lightning, sequela
T75.00XS is a billable ICD-10-CM diagnosis code for unspecified effects of lightning, sequela. The 7th character S marks it as a sequela code, which reports a problem that remains after the original condition has resolved. 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. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Effect of other external causes, sequela.
Code Identity
Code Classification
Present on Admission (POA)Billing
T75.00XS is exempt from POA reporting on inpatient claims to general acute care hospitals. Review other POA exempt codes.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Accident caused by lightning
- Direct lightning strike
- Effects of direct lightning strike
- Effects of lightning
- Effects of side flash from lightning
- Electric shock injury of peripheral nerve
- Exposure to direct strike from lightning
- Exposure to electric current, with passage of current through tissue
- Exposure to ground current from lightning strike
- Exposure to lightning, with passage of current through tissue
- Exposure to side flash effects from lightning
- Injury caused by explosive effect of lightning strike
- Injury from ground current from lightning
- Lightning
- Lightning injury to peripheral nerve
- Side flash from lightning
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
Lightning
an abrupt high-current electric discharge that occurs in the atmosphere and that has a path length ranging from hundreds of feet to tens of miles. (from mcgraw-hill dictionary of scientific and technical terms, 6th ed)Lightning Injuries
accidental injuries caused by brief high-voltage electrical discharges during thunderstorms. cardiopulmonary arrest, coma and other neurologic symptoms, myocardial necrosis, and dermal burns are common. prompt treatment of the acute sequelae, including cardiopulmonary resuscitation, is indicated for survival.Spasms, Infantile
an epileptic syndrome characterized by the triad of infantile spasms, hypsarrhythmia, and arrest of psychomotor development at seizure onset. the majority present between 3-12 months of age, with spasms consisting of combinations of brief flexor or extensor movements of the head, trunk, and limbs. the condition is divided into two forms: cryptogenic (idiopathic) and symptomatic (secondary to a known disease process such as intrauterine infections; nervous system abnormalities; brain diseases, metabolic, inborn; prematurity; perinatal asphyxia; tuberous sclerosis; etc.). (from menkes, textbook of child neurology, 5th ed, pp744-8)Atmosphere
the gaseous envelope surrounding a planet or similar body. (from random house unabridged dictionary, 2d ed)
Patient EducationClinical
Electrical Injuries
When you come in direct contact with electricity, it can pass through your body and cause injuries. These electrical injuries can be external or internal. You may have one or both types. External injuries are skin burns. Internal injuries include damage to your organs, bones, muscles, and nerves.
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Convert T75.00XS to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T75.00XSOverview
Is T75.00XS (Unspecified effects of lightning) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified effects of lightning, sequela on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character S in T75.00XS mean?
The final character S makes this a sequela code: it reports a lingering problem that remains after the unspecified effects of lightning itself has resolved, not the original event.
What MS-DRG does T75.00XS group to?
When unspecified effects of lightning, sequela 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.
Is T75.00XS exempt from POA reporting?
Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for unspecified effects of lightning, sequela on inpatient claims.
What is the ICD-9 equivalent of T75.00XS?
Under the General Equivalence Mappings, unspecified effects of lightning, sequela converts to ICD-9-CM 909.4 (late eff cert ext cause). 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.
