2027 ICD-10-CM Diagnosis Code G45.3Amaurosis fugax
ICD-10-CM Codes›G00–G99›G40-G47›G45
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Chronic Condition
G45.3 is a billable ICD-10-CM diagnosis code for amaurosis fugax. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 123. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 46 closely related codes. Coders also document this condition as acute cerebral ischemia. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Transient cerebral ischemia.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute cerebral ischemia
- Amaurosis
- Amaurosis fugax
- Amaurosis fugax of left eye
- Amaurosis fugax of right eye
- Carotid territory transient ischemic attack
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to G45.3: its own notes plus those printed at G45 and Chapter 6. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may 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)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name G45.3, its category, or a range that includes it.
Excludes1 4
These codes carry an Excludes1 note naming G45.3: they are not reported together with it, unless the two conditions are unrelated.
- H34 Retinal vascular occlusionsamaurosis fugax (G45.3)
- H53.12 Transient visual lossamaurosis fugax (G45.3-)
- H54 Blindness and low visionamaurosis fugax (G45.3)
- I65 Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarctioninsufficiency, NOS, of precerebral artery (G45.-) names G45.-, which includes this code
Excludes2 2
These codes carry an Excludes2 note naming G45.3: its condition is not part of those codes, and both may be reported when the patient has both.
- Chapter 9 (I00-I99) Diseases of the circulatory systemtransient cerebral ischemic attacks and related syndromes (G45.-) names G45.-, which includes this code
- I63.9 Cerebral infarction, unspecifiedtransient cerebral ischemic attacks and related syndromes (G45.-) names G45.-, which includes this code
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Amaurosis (acquired) (congenital) See Also: Blindness;
fugax G45.3
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Amaurosis Fugax
transient complete or partial monocular blindness due to retinal ischemia. this may be caused by emboli from the carotid artery (usually in association with carotid stenosis) and other locations that enter the central retinal artery. (from adams et al., principles of neurology, 6th ed, p245)
Patient EducationClinical
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Convert G45.3 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About G45.3Overview
What is the ICD-10 code for amaurosis fugax?
The ICD-10-CM code for amaurosis fugax is G45.3 (sometimes written as G453). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is G45.3 (Transient cerebral ischemic attacks and related syndromes) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report amaurosis fugax on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does G45.3 group to?
When amaurosis fugax is the principal diagnosis on an inpatient stay, it groups to MS-DRG 123 (neurological Eye Disorders), which carries a relative weight of 0.8218. Higher weights mean higher Medicare reimbursement.
Is G45.3 a CC or MCC?
CMS lists G45.3 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 46 closely related codes in its exclusion list.
Can G45.3 be reported with P91.0?
Not as a rule. The Excludes1 note at G45, which applies to G45.3, lists "neonatal cerebral ischemia (P91.0)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
