Question 1

Is E21 a billable ICD-10 code?

Accepted Answer

No, E21 is not a billable code. It is a category code that requires additional specificity. You must select a more specific code from the subcategories for billing purposes.

Question 2

What does ICD-10 code E21 mean?

Accepted Answer

ICD-10-CM code E21 represents Hyperparathyroidism and other disorders of parathyroid gland. This code is part of the International Classification of Diseases, 10th Revision, Clinical Modification used for medical coding and billing in the United States.

Question 3

When was ICD-10 code E21 introduced?

Accepted Answer

Code E21 has been part of ICD-10-CM since 2016, when the coding system was mandated for use in the United States. This code was included in the original US implementation.

Question 4

What is the parent category for ICD-10 code E21?

Accepted Answer

The parent category for E21 is section:E20-E35 (Disorders of other endocrine glands (E20-E35)). This hierarchical classification helps organize related diagnoses for more accurate coding.

Question 5

What conditions are excluded from E21?

Accepted Answer

Code E21 has Type 1 Excludes (mutually exclusive conditions) including: adult osteomalacia (M83.-); ectopic hyperparathyroidism (E34.2); hungry bone syndrome (E83.81) and 1 more conditions. These conditions cannot be coded together with E21 as they represent different diagnoses.

E212026

Excludes17Not coded together

Excludes21Not included here

Notes1Additional information

Is E21 a billable ICD-10 code?

What does ICD-10 code E21 mean?

When was ICD-10 code E21 introduced?

What is the parent category for ICD-10 code E21?

What conditions are excluded from E21?