ICD-10-CM 2027
ICD-10 code for microangiopathy
From the official ICD-10-CM alphabetic index entry “Microangiopathy (peripheral)”. Page updated September 29, 2026.
About coding microangiopathy
The ICD-10-CM code for microangiopathy is I73.9 (Peripheral vascular disease, unspecified). The official index lists 2 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I73.9.
Within I73, choose I73.9 (Peripheral vascular disease, unspecified) only when documentation doesn't support a more specific option: Raynaud's syndrome (I73.0), Thromboangiitis obliterans [Buerger's disease] (I73.1) and other specified peripheral vascular diseases (I73.8).
Don't report I73.9 together with the conditions in its Excludes1 note: atherosclerosis of the extremities (I70.2--I70.7-).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific microangiopathy codes (official index)
Don't confuse with (Excludes1 for I73.9)
Common questions about microangiopathy ICD-10 codes
What is the ICD-10 code for microangiopathy?
- I73.9 — Peripheral vascular disease, unspecified. More specific codes apply when the documentation supports them: M31.10, M31.11.
What is the ICD-10 code for thrombotic microangiopathy?
- M31.10 — Thrombotic microangiopathy, unspecified.
Is I73.9 billable?
- Yes. I73.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I73.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I73.9 as a principal diagnosis.
Is I73.9 a CC or MCC?
- No. I73.9 is neither a CC nor an MCC under MS-DRG v44.0.