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    v1.0.28
    OpenPayerBilling CodesFrostbiteICD-10-CM t33-superficial-frostbite
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    ICD-10-CM Code For Superficial Frostbite: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group T33 includes superficial frostbite diagnoses involving nonfull-thickness freezing injury to the skin and subcutaneous tissues of peripheral body parts such as digits, ears, nose, and face. These ICD-10-CM diagnosis codes are used to document injuries from cold exposure, capturing information about the extent and anatomical site of the frostbite which guides treatment and follow-up. Accurate coding within the ICD-10-CM T33 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM T33: Superficial Frostbite Overview

    The diagnoses in this group represent superficial frostbite injuries affecting the skin and subcutaneous tissues caused by cold exposure. They target peripheral body parts such as fingers, toes, ears, and nose and reflect nonfull-thickness freezing injury. Accurate coding matters for appropriate clinical documentation and can affect reimbursement and resource allocation for treatment.

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    When to Use

    Use a code from this group when documenting a patient with nonfull-thickness frostbite resulting from cold exposure to peripheral body parts. Select the code that specifies the anatomical site and laterality when documented to accurately reflect the clinical scenario.

    ICD-10-CM Codes

    111 rows

    ICD-10-CM CodeDescription
    T33.011ASuperficial frostbite of right ear, initial encounter
    T33.011DSuperficial frostbite of right ear, subsequent encounter
    T33.011SSuperficial frostbite of right ear, sequela
    T33.012ASuperficial frostbite of left ear, initial encounter
    T33.012DSuperficial frostbite of left ear, subsequent encounter
    T33.012SSuperficial frostbite of left ear, sequela
    T33.019ASuperficial frostbite of unspecified ear, initial encounter
    T33.019DSuperficial frostbite of unspecified ear, subsequent encounter
    T33.019SSuperficial frostbite of unspecified ear, sequela
    T33.02XASuperficial frostbite of nose, initial encounter
    T33.02XDSuperficial frostbite of nose, subsequent encounter
    T33.02XSSuperficial frostbite of nose, sequela
    T33.09XASuperficial frostbite of other part of head, initial encounter
    T33.09XDSuperficial frostbite of other part of head, subsequent encounter
    T33.09XSSuperficial frostbite of other part of head, sequela
    T33.1XXASuperficial frostbite of neck, initial encounter
    T33.1XXDSuperficial frostbite of neck, subsequent encounter
    T33.1XXSSuperficial frostbite of neck, sequela
    T33.2XXASuperficial frostbite of thorax, initial encounter
    T33.2XXDSuperficial frostbite of thorax, subsequent encounter

    Showing 1–20 of 111

    DRG Codes

    4 rows

    DRG CodeDescription
    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 hiker presents to the emergency department after prolonged exposure to subfreezing temperatures with numbness, superficial skin pallor, and clear blisters on the tips of multiple fingers; there is no deep tissue involvement or necrosis on exam. Emergency clinicians evaluate and treat for superficial frostbite affecting multiple digits and assign a code for multiple finger involvement with initial encounter. Typical codes: T33.511A, T33.512A
    • An elderly nursing home resident with limited mobility is brought to clinic for progressive peeling and recurrent superficial skin breakdown on the toes after repeated cold exposure over several days; wounds are superficial without evidence of deeper tissue damage but require outpatient wound care. The outpatient clinician documents superficial frostbite of the toes as a current problem related to repeated cold exposure and uses a code denoting superficial frostbite of the toes in a subsequent non-emergent encounter. Typical codes: T33.521D, T33.529D
    • A mountaineer is transferred from a rural facility after initial stabilization for superficial frostbite to the feet and hands complicated by infection of the superficial blisters requiring antibiotic management; care is being coordinated as part of treatment for the complication of infected superficial frostbite. The receiving team records superficial frostbite with associated infectious complication and assigns a code reflecting subsequent care for superficial frostbite of multiple extremities. Typical codes: T33.831D, T33.832D

    Related Codes

    T34-FROSTBITE-WITH-TISSUE-NECROSIS

    ICD-10-CM Code For Frostbite With Tissue Necrosis: 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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