H54.7 vs H54.8
H54.7 and H54.8 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 H54.8
legal blindness with specification of impairment level (H54.0-H54.7)
H54.7
Unspecified visual loss
BillableUnspecified
- Chapter 7
- Diseases of the eye and adnexa
- Section
- H53-H54
Use when the record says
- Visual impairment category 9 NOS
Indexed under
- Decrease › vision NEC (d)
- Defect, defective › vision NEC
- Diminished, diminution › vision NEC
- Impaired, impairment › vision NEC (function)
- Loss › vision, visual (of)
H54.8
Legal blindness, as defined in USA
Billable
- Chapter 7
- Diseases of the eye and adnexa
- Section
- H53-H54
Use when the record says
- Blindness NOS according to USA definition
Indexed under
- Blindness › legal (acquired) (congenital) (both eyes)
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