G90.522 — Complex regional pain syndrome I of left lower limb
Is G90.522 billable?
Yes — G90.522 is billable for FY2027. G90.522 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. G90.522 may be submitted for encounters from October 1, 2026 through September 30, 2027.
G90.522 at a glance
| Code | G90.522 |
|---|---|
| Description | Complex regional pain syndrome I of left lower limb |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does G90.522 group to?
G90.522 sits in MDC 01 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 073Cranial and Peripheral Nerve Disorders with MCCmedical
- 074Cranial and Peripheral Nerve Disorders without MCCmedical
As a secondary diagnosis, G90.522 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is G90.522 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under G90.52, the nearest indexed parent of G90.522. Use them to find the family, then select the specific code.
- Syndrome › pain › complex regional I › lower limb
Excludes1 — never code together — inherited from G90
The conditions below can never be reported together with G90.522 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- dysfunction of the autonomic nervous system due to alcohol (G31.2)
Excludes1 — never code together — inherited from G90.5
The conditions below can never be reported together with G90.522 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Chapter 6
The conditions below are not part of G90.522, but a patient may have both at the same time. When documentation supports it, G90.522 and the excluded code may both be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
How long has G90.522 existed?
G90.522 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.