I25.10 ICD-10-CM Code: Atherosclerotic heart disease of native coronary artery without angina pectoris
HCC Buddy Code Card
Digital ICD-10 code-book layout with official code detail, always-visible risk models, Code Trumping, and Buddy coding guidance.
FY 2026 Apr update / Diseases of the circulatory system (I00-I99) / Ischemic heart diseases (I20-I25)
I25.10
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceAtherosclerotic heart disease of native coronary artery without angina pectoris
Hardening and narrowing of the heart's blood vessels due to plaque buildup, without chest pain symptoms.
Buddy Insight
Atherosclerotic heart disease of native coronary artery without angina is one of the most commonly coded cardiac diagnoses, representing coronary artery disease in patients who do not have anginal symptoms.
CMS-HCC V28
00
RAF 0
CMS-HCC V24
00
RAF 0
ACA/HHS
00
RAF 0
ESRD/PACE
00
RAF 0
RXHCC
MappedHCC 188
RAF 0.0
Code Trumping
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Code Book Path
Inclusion Terms
Official- Atherosclerotic heart disease NOS
Excludes 2
Official- atheroembolism (I75.-)
- atherosclerosis of coronary artery bypass graft(s) and transplanted heart (I25.7-)
Related Child Codes
Includes
OfficialICD-10-CM does not list Includes notes for I25.10 in this effective period.
Excludes 1
OfficialICD-10-CM does not list Excludes 1 notes for I25.10 in this effective period.
Code First
OfficialICD-10-CM does not list Code First sequencing instructions for I25.10 in this effective period.
Use Additional
Official- code, if applicable, to identify:
- coronary atherosclerosis due to calcified coronary lesion (I25.84)
- coronary atherosclerosis due to lipid rich plaque (I25.83)
Code Also
OfficialICD-10-CM does not list Code Also instructions for I25.10 in this effective period.
Buddy Documentation Tip
MEAT Support
Audit Caution
Common Mistakes
Last updated: FY2026 ICD-10-CM Apr update, Apr 1, 2026 through Sep 30, 2026. CMS-HCC V28 is 100% phased in for payment year 2026.
Is I25.10 an HCC code?
No. I25.10 is a billable ICD-10-CM code but does not map to any HCC category in V28, V24, ESRD, or RxHCC.
HCC Category Mapping
RAF weights shown are the community, non-dual, aged base weights from the CMS risk adjustment model file. Actual per-patient RAF contribution depends on member segment, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains in use during the transition and for historical data.
MEAT Criteria for I25.10
For I25.10to count as a valid HCC diagnosis in a given encounter, the provider's documentation must show MEAT: Monitor, Evaluate, Assess, or Treat. A diagnosis from a prior year does not carry forward automatically, it has to be re-documented and supported each calendar year.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Only one of M/E/A/T is required to support the code, but the documentation must be specific enough to show that the provider actually addressed I25.10 during that encounter, not just copy-forwarded from a problem list.
What This Code Means
I25.10 is the ICD-10-CM diagnosis code for atherosclerotic heart disease of native coronary artery without angina pectoris. Hardening and narrowing of the heart's blood vessels due to plaque buildup, without chest pain symptoms. I25.10 sits in the ICD-10-CM chapter for diseases of the circulatory system (i00-i99), within the section covering ischemic heart diseases (i20-i25).
I25.10 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.
This code does NOT map to any HCC in V24 or V28 models. It has no risk adjustment impact for Medicare Advantage. It only maps to RxHCC 188 in the prescription drug model. This is a key distinction — coronary artery disease without angina is not risk-adjusted, while the same disease with unstable angina maps to HCC 87 with a RAF weight of 0.274.
HCC Buddy maintains structured V28 and V24 mapping, RAF weights, and MEAT documentation criteria for I25.10 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •This code indicates coronary artery disease without angina; confirm absence of anginal symptoms
- •Document the extent of atherosclerosis (native coronary artery involvement) in the medical record
Clinical Significance
Atherosclerotic heart disease of native coronary artery without angina is one of the most commonly coded cardiac diagnoses, representing coronary artery disease in patients who do not have anginal symptoms. While extremely prevalent, this code does NOT map to any HCC in V24 or V28 models, meaning it has no risk adjustment impact. It is important for clinical documentation but does not contribute to the patient's risk score.
Documentation Requirements
- ✓Provider documentation of coronary artery disease or atherosclerotic heart disease
- ✓Specification that native (non-grafted) coronary arteries are involved
- ✓Confirmation that the patient does not currently have angina pectoris
- ✓Supporting diagnostic evidence (cardiac catheterization, coronary computed tomography angiography, or stress test)
- ✓Current management plan (medications, lifestyle modifications)
Commonly Confused Codes
- •I25.110: Atherosclerotic heart disease of native coronary artery with unstable angina: presence of angina changes the code and adds HCC value
- •I25.119: Atherosclerotic heart disease of native coronary artery with unspecified angina: if any angina is documented
- •I25.810: Atherosclerosis of coronary artery bypass graft without angina: for grafted vessels
- •I25.5: Ischemic cardiomyopathy: when coronary artery disease has caused myocardial dysfunction
- •I25.9: Chronic ischemic heart disease, unspecified: less specific than I25.10