G90.5 — Complex regional pain syndrome I (CRPS I)
G90.5 is a non-billable header ICD-10-CM code for complex regional pain syndrome i (crps i). It cannot be billed on its own: choose one of the more specific child codes below.
Excludes1 — never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Reflex sympathetic dystrophy
Excludes1 inherited from the categories above G90.5
These are not written on G90.5, but they bind it: a note on a category applies to every code beneath it. Billing G90.5 with anything listed here is a denial.
Other codes that can never be billed with G90.5
These codes carry an Excludes1 note pointing at G90.5. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading G90.5 alone.
Risk adjustment
G90.5 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Code history
G90.5 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Code to one of these instead G90.5
4 child codes. Green means billable.
Related codes at this level
Codes that share G90. If G90.5 is not quite right, the correct code is usually one of these.
- G90.0Idiopathic peripheral autonomic neuropathy
- G90.1Familial dysautonomia [Riley-Day]
- G90.2Horner's syndrome
- G90.3Multi-system degeneration of the autonomic nervous system
- G90.4Autonomic dysreflexia
- G90.8Other disorders of autonomic nervous system
- G90.9Disorder of the autonomic nervous system, unspecified
- G90.APostural orthostatic tachycardia syndrome [POTS]
- G90.BLMNB1-related autosomal dominant leukodystrophy
Questions about G90.5
- Is G90.5 a billable ICD-10-CM code?
- No. G90.5 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does G90.5 sit in the tabular list?
- Diseases of the nervous system (G00-G99), in the block Other disorders of the nervous system (G89-G99).
- What cannot be coded together with G90.5?
- G90.5 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above G90.5 (G90) and apply to it just the same.