ICD-10 R94.31
Billable / SpecificAbnormal electrocardiogram [ECG] [EKG]
About ICD-10-CM R94.31
ICD-10-CM code R94.31 represents Abnormal electrocardiogram [ECG] [EKG]. This is a billable/specific code in the Symptoms, Signs, and Abnormal Findings chapter (block R94). The 2026 edition of ICD-10-CM R94.31 became effective on October 1, 2025.
Type 1 Excludes
Pure excludes, these codes can never be coded together with R94.31. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- long QT syndrome (I45.81)
Medicare LCD Coverage for R94.31
Local Coverage Determinations (LCDs) from CMS MACs that list R94.31 as a covered diagnosis.
Showing top 10 of 250 total . Click a CPT for full coverage scope.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing R94.31.
1 Cigna
5 Medicare
CPT Codes Commonly Billed with R94.31
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
- 93000 EKG 12-lead — tachycardia, bradycardia, palpitations, HTN, CAD, AFib, arrhythmia, chest pain, syncope, cardiomyopathy, AV block, bundle branch block, SVT, VT, diabetes screening, abnormal EKG Cardiology
- 93010 EKG interpretation only — same dx as 93000 Cardiology
- 93015 Stress test cardiovascular — chest pain, CAD, angina, tachycardia, dyspnea, HTN, diabetes, syncope, cardiac screening Cardiology
- 93451 Right heart cath — CAD, native vessel disease, ischemic cardiomyopathy, unstable angina, MI, heart failure, valvular disease, chest pain Cardiology
- 93350 Stress echo — known/suspected CAD, chest pain, angina, abnormal EKG, cardiomyopathy, HF, dyspnea Cardiology
Convert R94.31 to ICD-9-CM
Per CMS General Equivalence Mappings (GEMs), useful for legacy data review and historical claim analysis.
| ICD-10 | ICD-9 | Mapping Flags |
|---|---|---|
| R94.31 | 79431 | 00000 |
Flags format (5 digits): Approximate · No Map · Combination · Scenario · Choice List. Source: CMS 2017 GEMs (final version).
Codes Adjacent To R94.31
Other codes in section R90-R94 (Abnormal findings on diagnostic imaging and in function studies, without diagnosis).
ICD-10 R94.31, Billing FAQ
Is ICD-10 code R94.31 billable? +
Yes, R94.31 is a billable ICD-10-CM code that can appear as a primary or secondary diagnosis on claims.
What codes are Type 1 Excludes for R94.31? +
Type 1 Excludes (never code together with R94.31): long QT syndrome (I45.81)
What CPT codes are commonly billed with R94.31? +
Procedures frequently paired with R94.31 include: 93000, 93010, 93015, 93451, 93350.
What ICD-9 codes does R94.31 map to? +
Per CMS GEMs, R94.31 maps to ICD-9 codes: 79431. Useful for legacy data review and historical claim analysis.
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Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on August 31, 2026.
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