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Table 2 Relationship between ICD-9-CM code documentation and laboratory serum sodium < 136 mmol/L

From: Sensitivity of International Classification of Diseases codes for hyponatremia among commercially insured outpatients in the United States

  Hyponatremia
  + -
ICD-9 = 276.1 + 1407 839
  - 39,261 1,859,747
  1. Sensitivity = 3.46%
  2. Specificity = 99.95%
  3. Positive predictive value = 62.64%
  4. Negative predictive value = 97.93%