I25.3 ICD-10-CM Code: Aneurysm of heart
I25.3 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC Buddy coding tools
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)
I25.3
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceAneurysm of heart
An abnormal bulging or weakening of the heart wall that can potentially rupture.
CMS-HCC V28
N/A—
Not mapped
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
MappedHCC 188
Code-level coefficient reference
Code Book Path
Inclusion Terms
Official- Mural aneurysm
- Ventricular aneurysm
Excludes 2
Official- certain conditions originating in the perinatal period (P04-P96)Inherited from I00-I99, I25
- certain infectious and parasitic diseases (A00-B99)Inherited from I00-I99, I25
- complications of pregnancy, childbirth and the puerperium (O00-O9A)Inherited from I00-I99, I25
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Inherited from I00-I99, I25
- endocrine, nutritional and metabolic diseases (E00-E88)Inherited from I00-I99, I25
- injury, poisoning and certain other consequences of external causes (S00-T88)Inherited from I00-I99, I25
- neoplasms (C00-D49)Inherited from I00-I99, I25
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)Inherited from I00-I99, I25
- systemic connective tissue disorders (M30-M36)Inherited from I00-I99, I25
- transient cerebral ischemic attacks and related syndromes (G45.-)Inherited from I00-I99, I25
- non-ischemic myocardial injury (I5A)Inherited from I00-I99, I25
Related Codes
Includes
OfficialNo Includes notes are included in this display for I25.3. Check the code and parent instructions in the Code Book.
Excludes 1
OfficialNo Excludes 1 notes are included in this display for I25.3. Check the code and parent instructions in the Code Book.
Code First
OfficialNo Code First sequencing instructions are included in this display for I25.3. Check the code and parent instructions in the Code Book.
Use Additional
Official- code to identify:Inherited from I25
- chronic total occlusion of coronary artery (I25.82)Inherited from I25
- exposure to environmental tobacco smoke (Z77.22)Inherited from I25
- history of tobacco dependence (Z87.891)Inherited from I25
- occupational exposure to environmental tobacco smoke (Z57.31)Inherited from I25
- tobacco dependence (F17.-)Inherited from I25
- tobacco use (Z72.0)Inherited from I25
Code Also
Official- the presence of hypertension (I10-I1A)Inherited from I20-I25
Buddy Documentation Tip
MEAT Support
Audit Caution
Common Mistakes
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is I25.3 an HCC code?
I25.3 has no mapping under the current CMS-HCC V28 community payment model. I25.3 has a separate mapping under the Part D RxHCC model (HCC 188 (Coronary Artery Disease)); the applicable result needs member context.
- Code
- I25.3
- Description
- Aneurysm of heart
- HCC (V28)
- No CMS-HCC V28 mapping
- RAF reference coefficient
- —
- Billable
- Yes
- Payment year
- 2026
HCC Category Mapping
These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. Weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.
Work I25.3 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →
MEAT review for I25.3
For I25.3, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.
- 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
Coder workflow notes
Get the V28 mapping + MEAT cheat sheet
One printable reference: check representative V28 mappings and the documentation reminders your note needs. Free, no card.
Free PDF. No card. Unsubscribe anytime.
What This Code Means
I25.3 is the ICD-10-CM diagnosis code for aneurysm of heart. An abnormal bulging or weakening of the heart wall that can potentially rupture. I25.3 sits in the ICD-10-CM chapter for diseases of the circulatory system (i00-i99), within the section covering ischemic heart diseases (i20-i25).
I25.3 has no mapping under the current CMS-HCC V28 community payment model. I25.3 has a separate mapping under the Part D RxHCC model (HCC 188 (Coronary Artery Disease)); the applicable result needs member context. Do not assign V28 risk adjustment value from this page; verify the applicable model and payment year before using this code for risk adjustment.
Distinguish between true aneurysm and pseudoaneurysm in documentation.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for I25.3 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Distinguish between true aneurysm and pseudoaneurysm in documentation
- •Specify location (ventricular, septal) and whether it is contained or ruptured if this information is available
Documentation Requirements
- ✓Documentation of cardiac aneurysm with specification of location (ventricular, septal)
- ✓Imaging confirmation (echocardiogram, cardiac magnetic resonance imaging, or ventriculography)
- ✓Whether the aneurysm is a true aneurysm versus a pseudoaneurysm
- ✓Size of the aneurysm if documented
- ✓Associated complications (thrombus, arrhythmia, heart failure)
- ✓Etiology (typically post-myocardial infarction)