ICD-9 Diagnosis Code 273.4

Alpha-1-antitrypsin def

Diagnosis Code 273.4

ICD-9: 273.4
Short Description: Alpha-1-antitrypsin def
Long Description: Alpha-1-antitrypsin deficiency
This is the 2014 version of the ICD-9-CM diagnosis code 273.4

Code Classification
  • Endocrine, nutritional and metabolic diseases, and immunity disorders (240–279)
    • Other metabolic disorders and immunity disorders (270-279)
      • 273 Disorders of plasma protein metabolism

Information for Medical Professionals

Convert to ICD-10 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.
  • E88.01 - Alpha-1-antitrypsin deficiency

Index of Diseases and Injuries
References found for the code 273.4 in the Index of Diseases and Injuries:

    • AAT (alpha-1 antitrypsin) deficiency 273.4
    • Deficiency, deficient
      • AAT (alpha-1 antitrypsin) 273.4
      • alpha-1-antitrypsin 273.4
      • alpha-1-trypsin inhibitor 273.4
      • antitrypsin 273.4
      • serum
        • antitrypsin, familial 273.4
        • protein (congenital) 273.8

Information for Patients

Alpha-1 Antitrypsin Deficiency

Also called: AATD, Alpha-1, Inherited emphysema

Alpha-1 antitrypsin deficiency (AAT deficiency) is an inherited condition that raises your risk for lung and liver disease. Alpha-1 antitrypsin (AAT) is a protein that protects the lungs. The liver makes it. If the AAT proteins aren't the right shape, they get stuck in the liver cells and can't reach the lungs.

Symptoms of AAT deficiency include

  • Shortness of breath and wheezing
  • Repeated lung infections
  • Tiredness
  • Rapid heartbeat upon standing
  • Vision problems
  • Weight loss

Some people have no symptoms and do not develop complications.

Blood tests and genetic tests can tell if you have it. If your lungs are affected, you may also have lung tests. Treatments include medicines, pulmonary rehab, and extra oxygen, if needed. Severe cases may need a lung transplant. Not smoking can prevent or delay lung symptoms.

NIH: National Heart, Lung, and Blood Institute

  • Alpha-1 antitrypsin deficiency
  • Alpha-1 antitrypsin test

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