Z9109 - Other allergy status (not to drugs or biological substances)

International Classification of Diseases

Last updated: 10/3/2025

What is a ICD-10 Code?

ICD-10 (International Classification of Diseases, 10th Revision) codes are used to classify and code all diagnoses, symptoms, and procedures recorded in association with hospital care. These codes provide a standardized way to track health conditions and their treatment outcomes.

Detailed Description

This code indicates that you have a documented allergy or allergic reaction to something other than medications or biological substances. This could include allergies to environmental factors like pollen, dust, or pet dander, food allergies, or allergies to materials like latex or metals. This code is used to document your allergy history in your medical record for healthcare providers' reference.

Additional Information

This is a documentation code used to record allergy status in medical records. It does not represent a billable service or procedure, but rather important medical history information for healthcare providers.

Category

Personal history and risk factors

Medical Specialty

General medicine/Primary care

Expected Costs

Your actual cost will depend on your insurance coverage, provider location, and specific circumstances.

Why Understanding This Code Matters

On Your Medical Bill

This code appears on your medical bills to identify the specific service, procedure, drug, or medical diagnosis you received. Understanding what it means helps you verify you're being charged correctly and know what to expect.

For Your Health

Knowing what this code represents helps you understand your treatment plan, ask better questions during appointments, and track your healthcare journey more effectively.

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