G55 — Nerve root and plexus compressions in diseases classified elsewhere
Is G55 billable?
Yes — G55 is billable for FY2027. G55 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. G55 may be submitted for encounters from October 1, 2026 through September 30, 2027.
G55 at a glance
| Code | G55 |
|---|---|
| Description | Nerve root and plexus compressions in diseases classified elsewhere |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to G55?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name G55 directly.
This code describes a manifestation of an underlying disease. The underlying condition must be sequenced before it, so it can never be the principal or first-listed diagnosis.
Which MS-DRGs does G55 group to?
G55 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
How is G55 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to G55. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Neuritis › due to › herniation, nucleus pulposus (rheumatoid)
- Compression › nerve › root or plexus NOS › neoplastic disease
Excludes1 — never code together
The conditions below can never be reported together with G55 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- nerve root compression (due to) (in) ankylosing spondylitis (M45.-)
- nerve root compression (due to) (in) dorsopathies (M53.-, M54.-)
- nerve root compression (due to) (in) intervertebral disc disorders (M50.1.-, M51.1.-)
- nerve root compression (due to) (in) spondylopathies (M46.-, M48.-)
- nerve root compression (due to) (in) spondylosis (M47.0-, M47.2.-)
Code first
The underlying condition below must be sequenced before G55. G55 describes a manifestation and cannot be the principal or first-listed diagnosis.
- underlying disease, such as:
- neoplasm (C00-D49)
Excludes1 — never code together — inherited from G50-G59
The conditions below can never be reported together with G55 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 G55, but a patient may have both at the same time. When documentation supports it, G55 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 G55 existed?
G55 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.
Which codes are confused with G55?
ICD-10-CM declares these codes mutually exclusive with G55 — exactly one of each pair can be correct for a given encounter.