Is R94.31 a billable ICD-10-CM code?

Yes. R94.31 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does R94.31 sit in the tabular list?

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94).

What cannot be coded together with R94.31?

R94.31 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

R94.31

R94.31 — Abnormal electrocardiogram [ECG] [EKG]

Billable / specific codeICD-10-CM

R94.31 is a billable, specific ICD-10-CM code for abnormal electrocardiogram [ecg] [ekg]. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

long QT syndrome (I45.81)

Risk adjustment

R94.31 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

R94.31 is named in 29 Medicare coverage policies — 29 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56423Billing and Coding: Cardiology Non-emergent Outpatient Stress Testing
A56423Billing and Coding: Cardiology Non-emergent Outpatient Stress Testing
A56423Billing and Coding: Cardiology Non-emergent Outpatient Stress Testing
A56423Billing and Coding: Cardiology Non-emergent Outpatient Stress Testing

How R94.31 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to R94.31.

Abnormal, abnormality, abnormalities›electrocardiogram [ECG] [EKG]
Prolonged, prolongation›QT interval

Related codes at this level

Codes that share R94.3. If R94.31 is not quite right, the correct code is usually one of these.

Questions about R94.31

Is R94.31 a billable ICD-10-CM code?: Yes. R94.31 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does R94.31 sit in the tabular list?: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), in the block Abnormal findings on diagnostic imaging and in function studies, without diagnosis (R90-R94).
What cannot be coded together with R94.31?: R94.31 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.