E21 vs E83
E21 (Hyperparathyroidism and other disorders of parathyroid gland) compared with E83 (Disorders of mineral metabolism), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. E83 carries an Excludes1 note covering E21: “parathyroid disorders (E20-E21)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| E21Hyperparathyroidism and other disorders of parathyroid gland | E83Disorders of mineral metabolism | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89) | E00-E89 — Endocrine, Nutritional and Metabolic Diseases (E00-E89) |
| Definition | Hyperparathyroidism and other disorders of parathyroid gland is a non-billable ICD-10-CM category code (E21). | Disorders of mineral metabolism is a non-billable ICD-10-CM category code (E83). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources