Non-Billable / Non-Specific Code
ICD-10-CM E21 is the diagnosis code for Hyperparathyroidism and other disorders of parathyroid gland. This code falls under the section "Disorders of other endocrine glands" within Chapter 4 â Endocrine, nutritional and metabolic diseases (E00-E89). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as E21. They are mutually exclusive:
The following conditions are not included in E21. If the patient has both, code each condition separately:
Understanding where E21 sits in the ICD-10-CM classification helps ensure proper coding:
No, E21 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
E21 is the ICD-10-CM diagnosis code for "Hyperparathyroidism and other disorders of parathyroid gland". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
E21 is located in Section E20-E35 â "Disorders of other endocrine glands" within Chapter 4 of the ICD-10-CM Tabular List.
E21 has 6 sub-code(s) that provide more specific detail: E21.0, E21.1, E21.2, E21.3, E21.4 and more.
Use E21 when the patients documented diagnosis matches "Hyperparathyroidism and other disorders of parathyroid gland" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Hyperparathyroidism and other disorders of parathyroid gland is E21.
No, E21 is non-billable. Use a more specific sub-code for primary diagnosis billing.
E21 is in Chapter 4 of the ICD-10-CM Tabular List.
Type 1 Excludes for E21 include: adult osteomalacia (M83.-); ectopic hyperparathyroidism (E34.2); hungry bone syndrome (E83.81) and more.
Yes, E21 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.