E22.2 is a billable ICD code used to specify a diagnosis of syndrome of inappropriate secretion of antidiuretic hormone. A 'billable code' is detailed enough to be used to specify a medical diagnosis.
Syndrome of inappropriate antidiuretic hormone secretion (SIADH) is characterized by excessive release of antidiuretic hormone from the posterior pituitary gland or another source.
Use secondary code (s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code. Type 1 Excludes.
The 2022 edition of ICD-10-CM T50.2X5A became effective on October 1, 2021.