U.S. ICD-10-CM · FY 2027

R78 ICD-10-CM Code: Findings of drugs and other substances, not normally found in blood

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

R78

Findings of drugs and other substances, not normally found in blood

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where R78 sits

  1. 1

    Chapter 18

    Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

  2. 2

    Section

    Abnormal findings on examination of blood, without diagnosis (R70-R79)

  3. 3

    Category R78

    Findings of drugs and other substances, not normally found in blood

  4. 4

    Code R78

    Findings of drugs and other substances, not normally found in blood

More specific choices

Codes under R78

R78 is a non-billable category. Choose the child code that best matches the documented diagnosis.

R78.0

Finding of alcohol in blood

R78.1

Finding of opiate drug in blood

R78.2

Finding of cocaine in blood

R78.3

Finding of hallucinogen in blood

R78.4

Finding of other drugs of addictive potential in blood

R78.5

Finding of other psychotropic drug in blood

R78.6

Finding of steroid agent in blood

R78.7

Finding of abnormal level of heavy metals in blood

R78.8

Finding of other specified substances, not normally found in blood

R78.9

Finding of unspecified substance, not normally found in blood

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for R78.

Code first

No “code first” instruction is listed for R78.

Use additional code

  • code to identify any retained foreign body, if applicable (Z18.-)

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for R78.

Excludes2

Conditions not included here that may be reported separately when present.

  • mental or behavioral disorders due to psychoactive substance use (F10-F19)

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code R78 mean?

R78 is the FY 2027 U.S. ICD-10-CM code for “Findings of drugs and other substances, not normally found in blood.”

Is R78 a billable or specific ICD-10-CM code?

No. R78 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.

Where is R78 located in ICD-10-CM?

R78 is listed in Chapter 18, Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99), within Abnormal findings on examination of blood, without diagnosis (R70-R79) (R70–R79), under category R78, Findings of drugs and other substances, not normally found in blood.

What coding notes are listed for R78?

No inclusion terms are listed for R78 in this reference record. No code-first instruction is listed. Additional-code instructions: code to identify any retained foreign body, if applicable (Z18.-). No Excludes1 note is listed. Excludes2 notes: mental or behavioral disorders due to psychoactive substance use (F10-F19).

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