R88 – Abnormal findings in other body fluids and substances

ICD-10-CM 2027 diagnosis code · Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis

Non-billable header

ICD-10-CM code R88

Code: R88 (claims format: R88)
Description: Abnormal findings in other body fluids and substances
Billable: No – use a more specific code below
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: R83-R89 Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis

Billable codes under R88

R88 is a header code and cannot be used on claims. Choose the most specific code:

Notes inherited from parent codes

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

Block R83-R89

Excludes1 (not coded here):

abnormal findings on antenatal screening of mother (O28.-)
diagnostic abnormal findings classified elsewhere - see Alphabetical Index

Excludes2 (not included here):

abnormal findings on examination of blood, without diagnosis (R70-R79)
abnormal findings on examination of urine, without diagnosis (R80-R82)
abnormal tumor markers (R97.-)

Frequently asked questions

What is ICD-10 code R88?

R88 is the ICD-10-CM code for abnormal findings in other body fluids and substances, in the block R83-R89 (Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis).

Is R88 a billable code?

No. R88 is a header code with more specific child codes; report one of the billable codes listed above.

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.