ICD-10-CM Book 2026 Edition
Chapters ICD-10-CM Book Table of Content /
G89-G99 Other disorders of the nervous system /
G90 Disorders of autonomic nervous system
Billable ICD-10-CM Code G90.81
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G90.81
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Serotonin syndrome  |
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Serotonin toxicity
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codeFirst
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| poisoning due to drug or toxin, such as: |
| linezolid (T36.8X- with sixth character 1-4) |
| monoamine oxidase inhibitors (T43.1X with sixth character 1-4) |
| selective serotonin and norepinephrine reuptake inhibitors [SSNRI] (T43.21 with sixth character 1-4) |
| selective serotonin reuptake inhibitors [SSRI] (T43.22 with sixth character 1-4) |
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useAdditionalCode
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| code, if applicable, to identify: |
| disseminated intravascular coagulation (D65) |
| hypertensive crisis (I16.-) |
| metabolic acidosis (E87.2-) |
| shock, not elsewhere classified (R57.-) |
| toxic encephalopathy (G92.-) |
| ventricular tachycardia (I47.2-) |
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