ICD-10-CM Billable Code

T78.2

Anaphylactic shock, unspecified

Clinical Classification Guidelines

Inclusion Terms

  • Allergic shock
  • Anaphylactic reaction
  • Anaphylaxis

Excludes Type 1

  • anaphylactic reaction or shock due to adverse effect of correct medicinal substance properly administered (T88.6)
  • anaphylactic reaction or shock due to adverse food reaction (T78.0-)
  • anaphylactic reaction or shock due to serum (T80.5-)

Medical Intelligence & Overview

Anaphylactic shock, classified under ICD-10 code T78.2, is a severe and immediate allergic reaction that can be life-threatening. It occurs suddenly after exposure to an allergen and requires prompt medical attention. This type of shock involves a rapid systemic response that affects multiple organ systems, leading to potentially dangerous symptoms such as difficulty breathing, swelling, and a sudden drop in blood pressure. Recognizing the signs and understanding its causes are crucial for timely intervention and management.

Causes & Symptoms

Clinical Causes: Allergic reactions to foods such as nuts, shellfish, or dairy products Insect stings or bites from bees, wasps, or other insects Certain medications, including antibiotics and pain relievers Exposure to latex or other materials that may trigger allergic responses Exercise-induced anaphylaxis in some individuals Rarely, exposure to environmental factors like dust or pollen in sensitive individuals

Key Symptoms: Swelling of the face, lips, tongue, or throat (angioedema) Difficulty breathing or shortness of breath Wheezing or tightness in the chest Rapid or weak pulse Drop in blood pressure (hypotension) Dizziness or fainting Skin reactions such as hives, redness, or rash Feeling of impending doom or severe anxiety Nausea, vomiting, or abdominal cramps

Diagnostic & Treatment

Diagnosis Path: Diagnosing anaphylactic shock involves a thorough clinical assessment of the symptoms and history of allergen exposure. Emergency healthcare providers may perform physical examinations and ask about recent foods, insect bites, or medication intake. In some cases, blood tests or skin prick tests are conducted later to identify specific allergies. Immediate diagnosis is primarily based on the presence of characteristic symptoms, especially in the context of recent allergen exposure.

Treatment Protocols: Anaphylactic shock is a medical emergency. Treatment typically involves the rapid administration of epinephrine (adrenaline), which helps reverse the severe allergic reaction. Additional treatments may include antihistamines, corticosteroids, and medications to support blood pressure and breathing. Patients who experience anaphylaxis are often advised to carry epinephrine auto-injectors and seek immediate medical care if symptoms recur or worsen. Post-episode, healthcare providers may recommend allergy testing and strategies for avoidance of known allergens.

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

Clinical Advice & FAQs

Billing Guidance

Is T78.2 a billable ICD-10 code?
Yes, T78.2 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.

Documentation

How do I report T78.2?
Clinical documentation must specify the nature of Anaphylactic shock, unspecified and any associated comorbidities for accurate reporting.

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