R76 – Other abnormal immunological findings in serum

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

Non-billable header

ICD-10-CM code R76

Code: R76 (claims format: R76)
Description: Other abnormal immunological findings in serum
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: R70-R79 Abnormal findings on examination of blood, without diagnosis

Billable codes under R76

R76 is a header code and cannot be used on claims. Choose the most specific code:

R76.0 – Raised antibody titerBillable
R76.1 – Nonspecific reaction to test for tuberculosisHeader (more codes below)
R76.8 – Other specified abnormal immunological findings in serumHeader (more codes below)
R76.9 – Abnormal immunological finding in serum, unspecifiedBillable

Notes inherited from parent codes

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

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)

Frequently asked questions

What is ICD-10 code R76?

R76 is the ICD-10-CM code for other abnormal immunological findings in serum, in the block R70-R79 (Abnormal findings on examination of blood, without diagnosis).

Is R76 a billable code?

No. R76 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.