R94.31 – Abnormal electrocardiogram [ECG] [EKG]
ICD-10-CM 2027 diagnosis code · Abnormal findings on diagnostic imaging and in function studies, without diagnosis
- Code
R94.31(claims format:R9431)- Description
- Abnormal electrocardiogram [ECG] [EKG]
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
- Block
- R90-R94 Abnormal findings on diagnostic imaging and in function studies, without diagnosis
- Parent codes
- R94 › R94.3
Notes for R94.31
- long QT syndrome (I45.81)
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
R94 – Abnormal results of function studies
- abnormal results of radionuclide [radioisotope] uptake studies
- abnormal results of scintigraphy
Block R90-R94
- nonspecific abnormal findings on diagnostic imaging by computerized axial tomography [CAT scan]
- nonspecific abnormal findings on diagnostic imaging by magnetic resonance imaging [MRI][NMR]
- nonspecific abnormal findings on diagnostic imaging by positron emission tomography [PET scan]
- nonspecific abnormal findings on diagnostic imaging by thermography
- nonspecific abnormal findings on diagnostic imaging by ultrasound [echogram]
- nonspecific abnormal findings on diagnostic imaging by X-ray examination
- abnormal findings on antenatal screening of mother (O28.-)
- diagnostic abnormal findings classified elsewhere - see Alphabetical Index
Index terms for R94.31
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in R94.3
Frequently asked questions
What is ICD-10 code R94.31?
R94.31 is the ICD-10-CM code for abnormal electrocardiogram [ECG] [EKG], in the block R90-R94 (Abnormal findings on diagnostic imaging and in function studies, without diagnosis).
Is R94.31 a billable code?
Yes. R94.31 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does R94.31 belong to?
It belongs to category R94 – Abnormal results of function studies.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.