2027 ICD-10-CM Diagnosis Code T75.00XAUnspecified effects of lightning, initial encounter
T75.00XA is a billable ICD-10-CM diagnosis code for unspecified effects of lightning, 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 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 922 through 923. 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.
- 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 2027, published by CMS and the National Center for Health Statistics.
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to T75.00XA: its own notes plus those printed at T75, block T66-T78, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- code to identify any retained foreign body, if applicable (Z18.-)
Code Also
A second code may be needed to fully describe the condition; the note gives no sequencing direction.
- if applicable, place of occurrence, such as:
- highway rest stop (Y92.523)
- school (private) (public) (state) as the place of occurrence of the external cause (Y92.21-)
- service areas as the place of occurrence of the external cause (Y92.52-)
- single-family non-institutional (private) house as the place of occurrence of the external cause (Y92.01-)
- transport vehicle as the place of occurrence of the external cause (Y92.81-)
Notes
General instructions on how these codes are used.
- Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
- The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
7th Character
Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.
- The appropriate 7th character is to be added to each code from category T75
- Ainitial encounter this code
- Dsubsequent encounter
- Ssequela
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name T75.00XA, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming T75.00XA: they are not reported together with it, unless the two conditions are unrelated.
- Block W85-W99 Exposure to electric current, radiation and extreme ambient air temperature and pressurelightning (T75.0-) names T75.0-, which includes this code
Excludes2 1
These codes carry an Excludes2 note naming T75.00XA: its condition is not part of those codes, and both may be reported when the patient has both.
- Block X00-X08 Exposure to smoke, fire and flameslightning (T75.0-) names T75.0-, which includes this code
Code First 1
These codes say to code first a condition named in the note, and T75.00XA is one of the conditions named.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert T75.00XA to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T75.00XAOverview
What is the ICD-10 code for unspecified effects of lightning, initial encounter?
The ICD-10-CM code for unspecified effects of lightning, initial encounter is T75.00XA (sometimes written as T7500XA). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is T75.00XA (Unspecified effects of lightning) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified effects of lightning, initial encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What does the 7th character A in T75.00XA mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for unspecified effects of lightning, such as an emergency visit or first evaluation.
What MS-DRG does T75.00XA group to?
When unspecified effects of lightning, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 923, 922, with relative weights from 0.9980 to 1.6248 depending on complications. Higher weights mean higher Medicare reimbursement.
Can T75.00XA be reported with a code from T78?
Not as a rule. The Excludes1 note at T75, which applies to T75.00XA, lists "adverse effects NEC (T78.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
