G45 — Transient cerebral ischemic attacks and related syndromes
Is G45 billable?
No — G45 is a non-billable header code. G45 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 7 billable codes beneath G45.
Billable codes under this header
- G45.0Vertebro-basilar artery syndrome
- G45.1Carotid artery syndrome (hemispheric)
- G45.2Multiple and bilateral precerebral artery syndromes
- G45.3Amaurosis fugax
- G45.4Transient global amnesia
- G45.8Other transient cerebral ischemic attacks and related syndromes
- G45.9Transient cerebral ischemic attack, unspecified
G45 at a glance
| Code | G45 |
|---|---|
| Description | Transient cerebral ischemic attacks and related syndromes |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Excludes1 — never code together
The conditions below can never be reported together with G45 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 G45, but a patient may have both at the same time. When documentation supports it, G45 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)
What codes fall under G45? (7)
- G45.0Vertebro-basilar artery syndrome
- G45.1Carotid artery syndrome (hemispheric)
- G45.2Multiple and bilateral precerebral artery syndromes
- G45.3Amaurosis fugax
- G45.4Transient global amnesia
- G45.8Other transient cerebral ischemic attacks and related syndromes
- G45.9Transient cerebral ischemic attack, unspecified
How long has G45 existed?
G45 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 G45?
ICD-10-CM declares these codes mutually exclusive with G45 — exactly one of each pair can be correct for a given encounter.