G57.7 vs G90
G57.7 and G90 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 G57.7
complex regional pain syndrome I of lower limb (G90.52-)
G57.7
Causalgia of lower limb
Not billable
- Chapter 6
- Diseases of the nervous system
- Section
- G50-G59
Use when the record says
- Complex regional pain syndrome II of lower limb
Indexed under
- Causalgia › lower limb (upper limb)
G90
Disorders of autonomic nervous system
Not billable
- Chapter 6
- Diseases of the nervous system
- Section
- G89-G99
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