ICD-10-CM 2027 diagnosis code
I79.8Other disorders of arteries, arterioles and capillaries in diseases classified elsewhere
I79.8 is a valid, billable ICD-10-CM code for other disorders of arteries, arterioles and capillaries in diseases classified elsewhere. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Oth disord of art,arterioles & capilare in dis classd elswhr
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 I79.8
I79.8 is the ICD-10-CM diagnosis code for other disorders of arteries, arterioles and capillaries in diseases classified elsewhere. It belongs to category I79 (disorders of arteries, arterioles and capillaries in diseases classified elsewhere), block I70-I79 (diseases of arteries, arterioles and capillaries) 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 I79, choose I79.8 (Other disorders of arteries, arterioles and capillaries in diseases classified elsewhere) only when documentation doesn't support a more specific option: aneurysm of aorta in diseases classified elsewhere (I79.0) and aortitis in diseases classified elsewhere (I79.1).
Don't report I79.8 together with the conditions in its Excludes1 note: diabetic (peripheral) angiopathy (E08-E13 with .51-.52), syphilitic endarteritis (A52.09) and tuberculous endarteritis (A18.89).
Code first underlying disease, such as: 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 299 (Peripheral Vascular Disorders with MCC, relative weight 1.5842), DRG 300 (Peripheral Vascular Disorders with CC, relative weight 1.0464) and DRG 301 (Peripheral Vascular Disorders without CC/MCC, relative weight 0.7133), 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.
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 443.81 (peripheral angiopathy in diseases classified elsewhere).
Coding notes
Notes that apply from higher levels
Instructions written at a parent level also apply to I79.8.
Broader instructions also apply from Chapter 9: Diseases of the circulatory system.
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 05 · Diseases and Disorders of the Circulatory System
ICD-9-CM equivalent
Converter →- 443.81Peripheral angiopathy in diseases classified elsewhereapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about I79.8
Is I79.8 billable?
- Yes. I79.8 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I79.8 be used as a principal diagnosis?
- No. 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.
Is I79.8 a CC or MCC?
- No. I79.8 is neither a CC nor an MCC under MS-DRG v44.0.
What DRG does I79.8 group to?
- I79.8 is used in the MS-DRG v44.0 logic for MS-DRG 299 (Peripheral Vascular Disorders with MCC), MS-DRG 300 (Peripheral Vascular Disorders with CC) and MS-DRG 301 (Peripheral Vascular Disorders without CC/MCC). 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 I79.8?
- The CMS General Equivalence Mappings map I79.8 to ICD-9-CM 443.81.