ICD-10 Code G90.A – Postural orthostatic tachycardia syndrome [POTS] (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G90.A – Postural orthostatic tachycardia syndrome [POTS]
What it is
G90.A identifies postural orthostatic tachycardia syndrome, a disorder of autonomic regulation. It is used when documentation states POTS or equivalent wording.
Clinical signs
Typical features include symptoms that worsen on standing, such as lightheadedness, palpitations, and fatigue. Clinical features vary; refer to documentation.
When to use this code
Use G90.A when the provider documents POTS, postural orthostatic tachycardia syndrome, or a clearly equivalent diagnosis. It may also fit when the record describes orthostatic intolerance with tachycardia and confirms POTS. Check documentation if the note only mentions dizziness or syncope without the syndrome.
Do not use for
Do not use this code for nonspecific orthostatic symptoms, dehydration-related tachycardia, or syncope without confirmed POTS. If the diagnosis is uncertain, check documentation.
Coding tip
Code G90.A only when the clinician explicitly documents POTS or an unmistakable equivalent diagnosis.