ICD-10-CM 2027 diagnosis code
G90.52Complex regional pain syndrome I of lower limb
G90.52 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About G90.52
G90.52 is the ICD-10-CM diagnosis code for complex regional pain syndrome I of lower limb. It belongs to category G90 (disorders of autonomic nervous system), block G89-G99 (other disorders of the nervous system) and chapter 6 (diseases of the nervous system). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.
Within G90.5 (complex regional pain syndrome I (CRPS I)), G90.52 is specifically for complex regional pain syndrome I of lower limb. Related codes cover I, unspecified (G90.50), I of upper limb (G90.51) and I of other specified site (G90.59).
To report this condition, pick the subcode that matches the documentation: G90.521 (limb), G90.522 (limb), G90.523 (bilateral) and G90.529 (limb).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under G90.52
Notes that apply from higher levels
Instructions written at a parent level also apply to G90.52.
› From G90 Disorders of autonomic nervous system
- dysfunction of the autonomic nervous system due to alcohol (G31.2)
Broader instructions also apply from Chapter 6: Diseases of the nervous system.
Alphabetic index entries
1 entriesTerms in the official ICD-10-CM index that lead to G90.52.
Codes whose notes reference G90.52
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about G90.52
Is G90.52 billable?
- No. G90.52 is a header code. Report one of its more specific subcodes instead.