ICD-10-CM 2027 diagnosis code
I25.112Atherosclerotic heart disease of native coronary artery with refractory angina pectoris
I25.112 is a valid, billable ICD-10-CM code for atherosclerotic heart disease of native coronary artery with refractory angina pectoris. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.Short description: Athscl heart dis of native cor art with refract ang pctrs
Code last changed in FY2024 (effective October 1, 2023). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About I25.112
I25.112 is the ICD-10-CM diagnosis code for Atherosclerotic heart disease of native coronary artery with refractory angina pectoris. It belongs to category I25 (chronic ischemic heart disease), block I20-I25 (ischemic heart 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 I25.11 (Atherosclerotic heart disease of native coronary artery with angina pectoris), I25.112 is specifically for Atherosclerotic heart disease of native coronary artery with refractory angina pectoris. Related codes cover unstable angina pectoris (I25.110), with documented spasm (I25.111), other forms of angina pectoris (I25.118) and unspecified angina pectoris (I25.119).
Use an additional code to identify: chronic total occlusion of coronary artery (I25.82), exposure to environmental tobacco smoke (Z77.22), history of tobacco dependence (Z87.891), occupational exposure to environmental tobacco smoke (Z57.31), tobacco dependence (F17.-) and 1 more.
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 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.
The Medicare Code Editor expects this diagnosis only for patients age 15 through 124.
It was added in FY2023, effective October 1, 2022, and changed in FY2024.
Notes that apply from higher levels
Instructions written at a parent level also apply to I25.112.
› From I25 Chronic ischemic heart disease
- non-ischemic myocardial injury (I5A)
Broader instructions also apply from I20-I25 Ischemic heart diseases and Chapter 9: Diseases of the circulatory system.
Alphabetic index entries
1 entriesTerms in the official ICD-10-CM index that lead to I25.112.
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
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2023 (effective 10/1/2022): Added
- FY2024 (effective 10/1/2023): Title revised — was “Atherosclerosic heart disease of native coronary artery with refractory angina pectoris”
Common questions about I25.112
Is I25.112 billable?
- Yes. I25.112 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I25.112 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I25.112 as a principal diagnosis.
Is I25.112 a CC or MCC?
- I25.112 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.
What DRG does I25.112 group to?
- I25.112 is used in the MS-DRG v44.0 logic for MS-DRG 302 (Atherosclerosis with MCC) and MS-DRG 303 (Atherosclerosis without MCC). Which one applies depends on whether it is the principal diagnosis and on the rest of the claim.