ICD-10-CM 2027
ICD-10 code for Angiopathia
From the official ICD-10-CM alphabetic index entry “Angiopathia, angiopathy”. Page updated September 29, 2026.
About coding Angiopathia
The ICD-10-CM code for Angiopathia is I99.9 (Unspecified disorder of circulatory system). The official index lists 5 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I99.9.
Within I99, choose I99.9 (Unspecified disorder of circulatory system) only when documentation doesn't support a more specific option: other disorder of circulatory system (I99.8).
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 302 (Atherosclerosis with MCC, relative weight 1.1984) and DRG 303 (Atherosclerosis without MCC, relative weight 0.6612), in MDC 05 (Diseases and Disorders of the Circulatory 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.
More specific Angiopathia codes (official index)
- cerebral I67.9 — Cerebrovascular disease, unspecified
- amyloid E85.4 — Organ-limited amyloidosis
- diabetic (peripheral)
- peripheral I73.9 — Peripheral vascular disease, unspecified
- diabetic
- specified type NEC I73.89 — Other specified peripheral vascular diseases
- retinae syphilitica A52.05 — Other cerebrovascular syphilis
- retinalis (juvenilis)
- diabetic
- proliferative
Common questions about Angiopathia ICD-10 codes
What is the ICD-10 code for Angiopathia?
- I99.9 — Unspecified disorder of circulatory system. More specific codes apply when the documentation supports them: I67.9, E85.4, I73.9, I73.89 and others below.
What is the ICD-10 code for cerebral angiopathia?
- I67.9 — Cerebrovascular disease, unspecified.
What is the ICD-10 code for peripheral angiopathia?
- I73.9 — Peripheral vascular disease, unspecified.
What is the ICD-10 code for retinae syphilitica angiopathia?
- A52.05 — Other cerebrovascular syphilis.
Is I99.9 billable?
- Yes. I99.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I99.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I99.9 as a principal diagnosis.
Is I99.9 a CC or MCC?
- No. I99.9 is neither a CC nor an MCC under MS-DRG v44.0.