E54 vs E64.2
E54 and E64.2 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 E54
sequelae of vitamin C deficiency (E64.2)
E54
Ascorbic acid deficiency
Billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E50-E64
Use when the record says
- Deficiency of vitamin C
- Scurvy
Indexed under
- Barlow's disease
- Cheadle's disease
- Scurvy, scorbutic
- Arthritis, arthritic › scorbutic (acute) (chronic) (nonpyogenic) (subacute)
- Deficiency, deficient › ascorbic acid
E64.2
Sequelae of vitamin C deficiency
Billable
- Chapter 4
- Endocrine, nutritional and metabolic diseases
- Section
- E50-E64
Indexed under
- Sequelae › vitamin deficiency NEC › C (of)
- Deficiency, deficient › vitaminNOS › C › sequelae
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