R78.3 – Finding of hallucinogen in blood

ICD-10-CM 2027 diagnosis code · Abnormal findings on examination of blood, without diagnosis

Billable code

ICD-10-CM code R78.3

Code: R78.3 (claims format: R783)
Description: Finding of hallucinogen in blood
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 18. Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)
Block: R70-R79 Abnormal findings on examination of blood, without diagnosis
Parent codes: R78

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

R78 – Findings of drugs and other substances, not normally found in blood

Excludes2 (not included here):

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

Use additional code:

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

Block R70-R79

Excludes2 (not included here):

abnormal findings on antenatal screening of mother (O28.-)
abnormalities of lipids (E78.-)
abnormalities of platelets and thrombocytes (D69.-)
abnormalities of white blood cells classified elsewhere (D70-D72)
coagulation hemorrhagic disorders (D65-D68)
diagnostic abnormal findings classified elsewhere - see Alphabetical Index
hemorrhagic and hematological disorders of newborn (P50-P61)

Index terms for R78.3

Entries in the ICD-10-CM alphabetic index that lead to this code:

Findings, abnormal, inconclusive, without diagnosis, in blood, hallucinogen

Related codes in R78

Frequently asked questions

What is ICD-10 code R78.3?

R78.3 is the ICD-10-CM code for finding of hallucinogen in blood, in the block R70-R79 (Abnormal findings on examination of blood, without diagnosis).

Is R78.3 a billable code?

Yes. R78.3 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does R78.3 belong to?

It belongs to category R78 – Findings of drugs and other substances, not normally found in blood.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.