ICD-9 CM code 333.1 as an identifier of patients with essential tremor: a study of the positive predictive value of this code.

@article{Louis2007ICD9CC,
  title={ICD-9 CM code 333.1 as an identifier of patients with essential tremor: a study of the positive predictive value of this code.},
  author={Elan Daniel Louis and Lakeisha M Applegate and Eileen Rios},
  journal={Neuroepidemiology},
  year={2007},
  volume={28 3},
  pages={181-5}
}
BACKGROUND/AIMS Health outcomes research often uses administrative databases. Patients with the diseases of interest are identified using International Classification of Diseases (ICD-9 CM) codes. The utility of the code for essential tremor (ET), 333.1, remains untested. We determined the positive predictive value (PPV) of the code 333.1. METHODS Patients with the ICD-9 CM code 333.1 were identified from billing records at the Neurological Institute of New York. Their medical records were… CONTINUE READING

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