Table 5.
Type of variable | Code | Time window (days) | Code description | Percent gain | Cumulative gain |
---|---|---|---|---|---|
icd9 | 78097 | 730 | Altered Mental Status | 7.2 | 7.2 |
cpt4 | 70551 | 730 | Magnetic Resonance (e.g., Proton) Imaging, Brain (including Brain Stem); Without Contrast Material | 6.4 | 13.6 |
etg | 319900 | 60 | Neurological Diseases Signs & Symptoms | 4.4 | 18.0 |
cpt4 | 70450 | 730 | Computed Tomography, Head Or Brain; Without Contrast Material | 4.2 | 22.3 |
cpt4 | 70551 | 60 | Magnetic Resonance (e.g., Proton) Imaging, Brain (including Brain Stem); Without Contrast Material | 4.0 | 26.3 |
cpt4 | 96118 | 730 | Neuropsychological Testing (e.g., Halstead-reitan Neuropsychological Battery, Wechsler Memory Scales And Wisconsin Card Sorting Test), Per Hour Of The Psychologist's Or Physician's Time, Both Face-to-face Time Administering Tests To The Patient And Time Interpreting These Test Results And Preparing The Report | 3.4 | 29.7 |
etg | 319900 | 730 | Neurological Diseases Signs & Symptoms | 2.4 | 32.1 |
cpt4 | 96116 | 730 | Neurobehavioral Status Exam (clinical Assessment Of Thinking, Reasoning And Judgment, e.g., Acquired Knowledge, Attention, Language, Memory, Planning And Problem Solving, And Visual Spatial Abilities), Per Hour Of The Psychologist's Or Physician's Time, Both Face-to-face Time With The Patient And Time Interpreting Test Results And Preparing The Report | 2.4 | 34.5 |
etg | 239300 | 730 | Psychotic & Schizophrenic Disorders | 2.3 | 36.8 |
cpt4 | 96118 | 60 | Neuropsychological Testing (e.g., Halstead-Reitan Neuropsychological Battery, Wechsler Memory Scales And Wisconsin Card Sorting Test), Per Hour Of The Psychologist's Or Physician's Time, Both Face-to-face Time Administering Tests To The Patient And Time Interpreting These Test Results And Preparing The Report | 2.3 | 39.1 |
Additional features reported in Supplementary Material D.