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ICD-10-CM 2027 diagnosis code

G45.3Amaurosis fugax

✓ Billable / specificCC — complication/comorbidity

G45.3 is a valid, billable ICD-10-CM code for amaurosis fugax. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About G45.3

G45.3 is the ICD-10-CM diagnosis code for Amaurosis fugax. It belongs to category G45 (transient cerebral ischemic attacks and related syndromes), block G40-G47 (episodic and paroxysmal disorders) and chapter 6 (diseases of the nervous system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within G45 (transient cerebral ischemic attacks and related syndromes), G45.3 is specifically for Amaurosis fugax. Related codes cover Vertebro-basilar artery syndrome (G45.0), carotid artery syndrome (hemispheric) (G45.1), multiple and bilateral precerebral artery syndromes (G45.2), transient global amnesia (G45.4), other transient cerebral ischemic attacks and related syndromes (G45.8) and transient cerebral ischemic attack, unspecified (G45.9).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 123 (Neurological Eye Disorders, relative weight 0.822), in MDC 02 (Diseases and Disorders of the Eye), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 362.34 (transient retinal arterial occlusion).

Notes that apply from higher levels

Instructions written at a parent level also apply to G45.3.

› From G45 Transient cerebral ischemic attacks and related syndromes
Excludes1
  • neonatal cerebral ischemia (P91.0)
  • transient retinal artery occlusion (H34.0-)

Broader instructions also apply from Chapter 6: Diseases of the nervous system.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to G45.3.

Codes whose notes reference G45.3

MS-DRG v44.0 grouping

All DRGs →

Inpatient MS-DRGs this diagnosis can group to, as the principal or a secondary diagnosis, depending on the rest of the claim.

MDC 02 · Diseases and Disorders of the Eye

ICD-9-CM equivalent

Converter →
  • 362.34Transient retinal arterial occlusionapproximate

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about G45.3

Is G45.3 billable?

Yes. G45.3 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can G45.3 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict G45.3 as a principal diagnosis.

Is G45.3 a CC or MCC?

G45.3 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.

What DRG does G45.3 group to?

G45.3 is used in the MS-DRG v44.0 logic for MS-DRG 123 (Neurological Eye Disorders). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.

What is the ICD-9 code for G45.3?

The CMS General Equivalence Mappings map G45.3 to ICD-9-CM 362.34.