ICD-10-CM › I00-I99 › I30-I5A › I51 Complications and ill-defined... › I51.9
Heart disease, unspecified
ValidICD-10-CM diagnosis code.
Valid for claims with a date of service in the current code year.
What has happened to this code
Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.
- FY2007 Added to the draft code set draft Heart disease, unspecified
Official coding rules
Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.
Inherited from I51 Complications and ill-defined descriptions of heart disease
Excludes2 - not included here
- heart disease specified as rheumatic (I00-I09)
How CDC's index refers to this code
Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.
- Cardiosis
- Bad > heart
- Cardiopathy
- Convulsions
- Malfunction
- Ailment heart
- Cardiostenosis
- Change > heart
- Crisis > heart
- Lesion > heart
- Strain > heart
- Morbus > cordis
- Organic > heart
- Paresis > heart
- Seizure > heart
- Trouble > heart
- Cachexia > heart
- Collapse > heart
- Lesion > cardiac
- Stricture > heart
- Cachexia > cardiac
- Compression > heart
- Myasthenia > cordis
- Stricture > cardiac
- Tear, torn > muscle
- Tear, torn > tendon
- Fatigue > myocardium
- Collapse > myocardial
- Low > cardiac reserve
- Low > output syndrome
- Mental > subnormality
- Compensation > failure
- Complication > cardiac
- Decompensation > heart
- Sudden > heart failure
- Thyrotoxicosis > heart
- Decompensation > cardiac
- Failure, failed > cardiac
- Asthenia, asthenic > heart
- Rupture, ruptured > muscle
Showing 40 of 86 index phrases.
Codes in the same group
| Code | Description | Status |
|---|---|---|
| I51.0 | Cardiac septal defect, acquired | Valid |
| I51.1 | Rupture of chordae tendineae, not elsewhere classified | Valid |
| I51.2 | Rupture of papillary muscle, not elsewhere classified | Valid |
| I51.3 | Intracardiac thrombosis, not elsewhere classified | Valid |
| I51.4 | Myocarditis, unspecified | Valid |
| I51.5 | Myocardial degeneration | Valid |
| I51.7 | Cardiomegaly | Valid |
| I51.8 | Other ill-defined heart diseases | Not billable |