Excludes1 pair
E20- vs E89.2
E20 and E89.2 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
The official note, declared on E20
postprocedural hypoparathyroidism (E89.2)
E20
Hypoparathyroidism
Not billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E20-E35
E89.2
Postprocedural hypoparathyroidism
Billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E89
Use when the record says
- Parathyroprival tetany
Indexed under
- Absence › parathyroid gland (acquired)
- Hypoparathyroidism › postprocedural
- Tetany › parathyroprival
- Tetany › post-thyroidectomy (para)
- Tetany › postoperative
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027