R78
ICD-10Non-billable categoryFind of drugs and oth substnc, not normally found in blood
Official ICD-10-CM descriptor (FY2026)
Findings of drugs and other substances, not normally found in blood
R78 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
Excludes2
Not included here. The condition is not part of this code, but a patient may have both, and both codes may be reported together.
- mental or behavioral disorders due to psychoactive substance use (F10-F19)
Use additional code
Report an additional code to identify the associated condition.
- code to identify the any retained foreign body, if applicable (Z18.-)
More specific codes under R78
- R78.0Finding of alcohol in blood
- R78.1Finding of opiate drug in blood
- R78.2Finding of cocaine in blood
- R78.3Finding of hallucinogen in blood
- R78.4Finding of other drugs of addictive potential in blood
- R78.5Finding of other psychotropic drug in blood
- R78.6Finding of steroid agent in blood
- R78.7Finding of abnormal level of heavy metals in bloodcategory
- R78.8Finding of oth substances, not normally found in bloodcategory
- R78.9Finding of unsp substance, not normally found in blood
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.