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R78

Non-billable

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

R78 is the ICD-10-CM code for Findings of drugs and other substances, not normally found in blood. It is a non-billable category code — use a more specific child code such as R78.0 for billing.

Status
Header (non-billable)
Chapter
R00-R99
Subcodes
10
Edition
FY2026

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

Excludes2 — not included here

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

Use additional code

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

Frequently asked questions

What is ICD-10 code R78?
R78 is the ICD-10-CM code for "Findings of drugs and other substances, not normally found in blood". It falls under R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.
Is R78 a billable code?
No — R78 is a non-billable header code. Use a more specific child code (such as R78.0) for billing.
What are the subcodes of R78?
R78 has 10 more specific child codes, including R78.0, R78.1, R78.2.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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