R94.30 ICD-10-CA code: Electrocardiogram suggestive of ST segment elevation myocardial infarction [STEMI]
R94.30 is the ICD-10-CA code for “Electrocardiogram suggestive of ST segment elevation myocardial infarction [STEMI]” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
R94.30Electrocardiogram suggestive of ST segment elevation myocardial infarction [STEMI]
Short description: ECG suggests STEMI
ICD-10-CA · Canada · Also written R9430
Index terms
Entries in CIHI’s alphabetical index that lead to R94.30. Searching the index by the condition the note names is how coders reach this code.
- Abnormal, abnormality, abnormalities, electrocardiogram (ECG) (EKG), suggestive of ST elevation myocardial infarction [STEMI]
Notes for R94.30
As CIHI prints them, with any note R94.30 takes from the headings above it.
Includes
- Abnormal results of:• radionuclide [radioisotope] uptake studies• scintigraphyFrom R94 Abnormal results of function studies
- Nonspecific abnormal findings on diagnostic imaging by:• computerized axial tomography [CAT scan]• magnetic resonance imaging [MRI][NMR]• positron emission tomography [PET scan]• thermography• ultrasound [echogram]• Xray examinationFrom R90-R94 Abnormal findings on diagnostic imaging and in function studies, without diagnosis
Excludes
Conditions classified elsewhere.
- Abnormal findings on antenatal screening of mother (O28.-)diagnostic abnormal findings classified elsewhere - see Alphabetical IndexFrom R90-R94 Abnormal findings on diagnostic imaging and in function studies, without diagnosis
- Abnormal findings on antenatal screening of mother (O28.-)certain conditions originating in the perinatal period (P00-P96)From Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Note
- Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated "not otherwise specified", "unknown etiology" or "transient". The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.The conditions and signs or symptoms included in categories (R00-R99) consist of:(a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;(b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;(c) provisional diagnoses in a patient who failed to return for further investigation or care;(d) cases referred elsewhere for investigation or treatment before the diagnosis was made;(e) cases in which a more precise diagnosis was not available for any other reason;(f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.From Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Where R94.30 sits
- 1ChapterChapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
- 2Block R90-R94Abnormal findings on diagnostic imaging and in function studies, without diagnosis
- 3Category R94Abnormal results of function studies
- 4Subcategory R94.3Abnormal results of cardiovascular function studies
- 5Valid code R94.30Electrocardiogram suggestive of ST segment elevation myocardial infarction [STEMI]
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does ICD-10-CA code R94.30 mean?
R94.30 is the ICD-10-CA code for “Electrocardiogram suggestive of ST segment elevation myocardial infarction [STEMI]” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is R94.30 in ICD-10-CA?
R94.30 sits under R94.3 Abnormal results of cardiovascular function studies, within R94 Abnormal results of function studies, within R90-R94 Abnormal findings on diagnostic imaging and in function studies, without diagnosis, within Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99).
What coding notes apply to R94.30?
ICD-10-CA lists Includes, Excludes, Note notes for R94.30, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.