ICD-10-CM
ICD-10 code for Abnormal EKG: R94.31
The closest CDC title for "Abnormal EKG" is R94.31, Abnormal electrocardiogram [ECG] [EKG]. R94.31 is a billable code.
Source: CDC ICD-10-CM FY2027 order file dated June 16, 2026. Publisher page
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Codes under R94, then other CDC titles that name abnormal electrocardiogram [ecg] [ekg]
A header groups codes and is not billed. A billable code is one you can report.
- R94Abnormal results of function studiesHeader
- R94.0Abnormal results of function studies of central nervous systemHeader
- R94.01Abnormal electroencephalogram [EEG]Billable
- R94.02Abnormal brain scanBillable
- R94.09Abnormal results of other function studies of central nervous systemBillable
- R94.1Abnormal results of function studies of peripheral nervous system and special sensesHeader
- R94.11Abnormal results of function studies of eyeHeader
- R94.110Abnormal electro-oculogram [EOG]Billable
- R94.111Abnormal electroretinogram [ERG]Billable
- R94.112Abnormal visually evoked potential [VEP]Billable
- R94.113Abnormal oculomotor studyBillable
- R94.118Abnormal results of other function studies of eyeBillable
- R94.12Abnormal results of function studies of ear and other special sensesHeader
- R94.120Abnormal auditory function studyBillable
- R94.121Abnormal vestibular function studyBillable
- R94.128Abnormal results of other function studies of ear and other special sensesBillable
- R94.13Abnormal results of function studies of peripheral nervous systemHeader
- R94.130Abnormal response to nerve stimulation, unspecifiedBillable
- R94.131Abnormal electromyogram [EMG]Billable
- R94.138Abnormal results of other function studies of peripheral nervous systemBillable
- R94.2Abnormal results of pulmonary function studiesBillable
- R94.3Abnormal results of cardiovascular function studiesHeader
- R94.30Abnormal result of cardiovascular function study, unspecifiedBillable
- R94.31Abnormal electrocardiogram [ECG] [EKG]Billable
- R94.39Abnormal result of other cardiovascular function studyBillable
- R94.4Abnormal results of kidney function studiesBillable
- R94.5Abnormal results of liver function studiesBillable
- R94.6Abnormal results of thyroid function studiesBillable
- R94.7Abnormal results of other endocrine function studiesBillable
- R94.8Abnormal results of function studies of other organs and systemsBillable
Excludes1
Excludes1 means these codes are not reported together.
Related conditions
Related pages
- R94.31 code detailsNotes, nearby codes, CMS-HCC group
- Category R94Every code under it
- Chapter 18Symptoms, signs and abnormal clinical findings
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Abnormal EKG?
The closest CDC title for "Abnormal EKG" is R94.31, Abnormal electrocardiogram [ECG] [EKG]. R94.31 is a billable code.
Is R94.31 billable?
Yes. R94.31 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to R94.31?
The CDC tabular list gives 1 Excludes1 note (not coded together) for R94.31 and the categories above it. They are listed on this page.
What chapter is R94.31 in?
Chapter 18. Symptoms, signs and abnormal clinical findings.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.