G50.9 — Disorder of trigeminal nerve, unspecified
Is G50.9 billable?
Yes, but G50.9 is an unspecified code. G50.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, G50.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting G50.9 — the more specific alternatives are listed below.
More specific alternatives
G50.9 at a glance
| Code | G50.9 |
|---|---|
| Description | Disorder of trigeminal nerve, unspecified |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does G50.9 group to?
G50.9 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 G50.9 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to G50.9. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Lesion › trigeminal nerve (s) (nontraumatic)
- Paralysis, paralytic › paratrigeminal (complete) (incomplete)
- Paralysis, paralytic › trigeminal nerve (complete) (incomplete)
- Disorder › nerve › trigeminal (of)
- Lesion › cranial nerve › fifth (s) (nontraumatic)
- Paralysis, paralytic › nerve › trigeminal (complete) (incomplete)
- Disorder › nerve › cranial › fifth (of)
Excludes1 — never code together — inherited from G50-G59
The conditions below can never be reported together with G50.9 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 G50.9, but a patient may have both at the same time. When documentation supports it, G50.9 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 G50.9 existed?
G50.9 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.