ICD-10 Code E16.A1 – Hypoglycemia level 1 (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E16.A1 – Hypoglycemia level 1
What it is
E16.A1 identifies hypoglycemia level 1, a documented low-glucose episode that is less severe than advanced hypoglycemia. Use it when the record specifically states this level.
Clinical signs
Clinical features may include hunger, sweating, shakiness, dizziness, or confusion. Clinical features vary; refer to documentation, and confirm the episode is recorded as level 1.
When to use this code
Use this code when the provider documents hypoglycemia level 1, including in diabetes-related or non-diabetes-related encounters. Code it from the chart wording, not from assumptions about glucose readings. If the note only says “low blood sugar,” check documentation for the specific level.
Do not use for
Do not use it for unspecified hypoglycemia or for more severe hypoglycemia levels. Do not assign it when hypoglycemia is only suspected or when the record does not confirm the level.
Coding tip
Match the exact hypoglycemia level documented and query if the note is vague.