Cost of illness of hyponatremia in the United States

Table 4 Diagnostic tests and procedures

	Chest X-Ray	Basic Metabolic Panel	TSH	Urine Osmolality	ACTH Stimulation Test	MRI	Chest CT with or without Abdominal Scan
Initial Evaluation
Patients with CHF, Cirrhosis, Renal Failure, or Taking Diuretics	100%	100%	100%	0%	0%	0%	0%
Patients with SIADH	100%	100%	100%	100%	100%	25%	25%
Patients with All Other Etiologies	100%	100%	100%	100%	100%	0%	0%
Follow-Up Visits
Initial Treatment in Inpatient Setting	100%	100%	0%	0%	0%	0%	0%
Initial Treatment in ER Setting	100%	100%	0%	0%	0%	0%	0%
Initial Treatment in Office Setting	80%–90%	90%	0%	0%	0%	0%	0%

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