E21 vs E55.0
E21 and E55.0 can never be reported together. ICD-10-CM declares them mutually exclusive with an Excludes1 note, meaning the two conditions cannot occur in the same patient — so exactly one of them is correct for any given encounter.
The official note, declared on E21
infantile and juvenile osteomalacia (E55.0)
E21
Hyperparathyroidism and other disorders of parathyroid gland
Not billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E20-E35
E55.0
Rickets, active
Billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E50-E64
Use when the record says
- Infantile osteomalacia
- Juvenile osteomalacia
Indexed under
- Rickets (active) (acute) (adolescent) (chest wall) (congenital) (current) (infantile) (intestinal)
- Rosary, rachitic
- Calciferoldeficiency › with rickets (vitamin D)
- Disease, diseased › English
- Morbus › angelicus, anglorum
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