I68.0Cerebral amyloid angiopathy

I68.0 is the ICD-10-CM diagnosis code for cerebral amyloid angiopathy. It belongs to category I68 (cerebrovascular disorders in diseases classified elsewhere), block I60-I69 (cerebrovascular diseases) and chapter 9 (diseases of the circulatory 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 I68 (cerebrovascular disorders in diseases classified elsewhere), I68.0 is specifically for cerebral amyloid angiopathy. Related codes cover cerebral arteritis in other diseases classified elsewhere (I68.2) and other cerebrovascular disorders in diseases classified elsewhere (I68.8).

Code first: underlying amyloidosis (E85.-).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

In MS-DRG v44.0, it is part of the grouping logic for DRG 070 (Other Cerebrovascular Disorders with MCC, relative weight 1.6093), DRG 071 (Other Cerebrovascular Disorders with CC, relative weight 1.0177) and DRG 072 (Other Cerebrovascular Disorders without CC/MCC, relative weight 0.7348), in MDC 01 (Diseases and Disorders of the Nervous System), 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 is a manifestation code, so it describes the effect of an underlying disease and can't be the principal diagnosis. Code the underlying condition first.

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 437.8 (other ill-defined cerebrovascular disease).