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    v1.0.28
    OpenPayerBilling CodesOther and unspecified effects of external causesICD-10-CM t75-other-and-unspecified-effects
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    ICD-10-CM Code For Other And Unspecified Effects Of Other External Causes: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group T75 includes conditions describing other and unspecified effects of external causes, such as systemic reactions or sequelae from environmental exposures, animal or insect encounters, and external agents not classified elsewhere. These ICD-10-CM diagnosis codes are used to document clinical scenarios where the primary issue is an effect of an external cause rather than a specific injury or poisoning, capturing severity, organ involvement, or multisystem clinical complexity. Accurate coding within the ICD-10-CM T75 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM T75: Other And Unspecified Effects Of Other External Causes Overview

    The ICD-10-CM T75 diagnosis group captures other and unspecified effects of external causes that do not fit more specific injury or poisoning codes. These codes address systemic or localized consequences from diverse external agents or events affecting multiple body systems. Accurate coding matters for proper claim processing and to reflect clinical complexity for reimbursement.

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    When to Use

    Use a code from this group when the clinical record documents an effect attributable to an external cause but lacks a more specific injury, poisoning, or toxic effect code. These codes are appropriate when the presenting problem is the consequence of an external agent or event rather than a defined traumatic injury.

    ICD-10-CM Codes

    48 rows

    ICD-10-CM CodeDescription
    T75.00XAUnspecified effects of lightning, initial encounter
    T75.00XDUnspecified effects of lightning, subsequent encounter
    T75.00XSUnspecified effects of lightning, sequela
    T75.01XAShock due to being struck by lightning, initial encounter
    T75.01XDShock due to being struck by lightning, subsequent encounter
    T75.01XSShock due to being struck by lightning, sequela
    T75.09XAOther effects of lightning, initial encounter
    T75.09XDOther effects of lightning, subsequent encounter
    T75.09XSOther effects of lightning, sequela
    T75.1XXAUnspecified effects of drowning and nonfatal submersion, initial encounter
    T75.1XXDUnspecified effects of drowning and nonfatal submersion, subsequent encounter
    T75.1XXSUnspecified effects of drowning and nonfatal submersion, sequela
    T75.20XAUnspecified effects of vibration, initial encounter
    T75.20XDUnspecified effects of vibration, subsequent encounter
    T75.20XSUnspecified effects of vibration, sequela
    T75.21XAPneumatic hammer syndrome, initial encounter
    T75.21XDPneumatic hammer syndrome, subsequent encounter
    T75.21XSPneumatic hammer syndrome, sequela
    T75.22XATraumatic vasospastic syndrome, initial encounter
    T75.22XDTraumatic vasospastic syndrome, subsequent encounter

    Showing 1–20 of 48

    DRG Codes

    5 rows

    DRG CodeDescription
    149Dysequilibrium
    922Other Injury, Poisoning and Toxic Effect Diagnoses with MCC
    923Other Injury, Poisoning and Toxic Effect Diagnoses without MCC
    949Aftercare with CC/MCC
    950Aftercare without CC/MCC

    Typical Clinical Scenarios

    • An adult presents to the emergency department after a motor vehicle collision with acute onset dizziness, nausea, and disorientation but no external head wound; evaluation suggests concussion-like symptoms and transient altered mental status due to the crash. The patient is treated acutely for neurologic symptoms related to the external traumatic event and a code from this group is assigned to capture the unspecified effects of the external cause on the central nervous system. Typical codes: T75.3XXA.
    • An elderly nursing home resident with progressive memory impairment and frequent falls is evaluated for recurrent, non-penetrating head impacts over months; the clinician documents ongoing cognitive decline believed to be related to repeated external force exposures. Because these are chronic or sequela effects from prior external causes rather than a new injury, a code from this group is used to indicate unspecified or other effects of external causes contributing to the patient’s condition. Typical codes: T75.1XXD, T75.1XXS.
    • A construction worker presents to urgent care after a high fall with acute chest pain and shortness of breath; imaging shows contusion of the chest wall and persistent respiratory compromise requiring follow-up care for delayed effects of the trauma. A code from this group is assigned to describe other or unspecified effects of the external cause (blunt force) on the cardiopulmonary system as part of the encounter and ongoing management. Typical codes: T75.21XA, T75.21XD.

    Related Codes

    T66-RADIATION-SICKNESS-UNSPECIFIED

    ICD-10-CM Code For Radiation Sickness Unspecified: Group Overview

    T67-EFFECTS-OF-HEAT-AND-LIGHT

    ICD-10-CM Code For Effects Of Heat And Light: Group Overview

    T68-HYPOTHERMIA

    ICD-10-CM Code For Hypothermia: Group Overview

    T69-OTHER-EFFECTS-OF-REDUCED-TEMPERATURE

    ICD-10-CM Code For Other Effects Of Reduced Temperature: Group Overview

    T70-EFFECTS-OF-AIR-PRESSURE

    ICD-10-CM Code For Effects Of Air Pressure And Water Pressure: Group Overview

    T71-ASPHYXIATION-AND-RELATED-CONDITIONS

    ICD-10-CM Code For Asphyxiation: Group Overview

    T74-ADULT-AND-CHILD-ABUSE

    ICD-10-CM Code For Adult And Child Abuse Neglect And Other Maltreatment Confirmed: Group Overview

    T76-ADULT-AND-CHILD-ABUSE-NEGLECT

    ICD-10-CM Code For Adult And Child Abuse Neglect And Other Maltreatment Suspected: Group Overview

    T78-ADVERSE-EFFECTS-NOT-ELSEWHERE-CLASSIFIED

    ICD-10-CM Code For Adverse Effects Not Elsewhere Classified: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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