2026 ICD-10-CM Diagnosis Code R76Other abnormal immunological findings in serum

ICD-10-CM Codes›R00–R99›R70-R79›R76

ICD-10-CM R76
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

R76 is a non-billable ICD-10-CM category code for other abnormal immunological findings in serum, so it cannot be submitted on claims. Use a more specific code from this category instead, such as R76.0, R76.11, R76.12, and R76.81. As a symptom code, it should not be used as a principal diagnosis once a related definitive diagnosis has been established.

Code Identity

ICD-10-CM Code
R76
Billable Status
No — Non-Billable Category
Code Describes
Other abnormal immunological findings in serum
Chapter
R70-R79
Abnormal findings on examination of blood, without diagnosis

Code Classification

ChapterR00–R99Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
SectionR70-R79Abnormal findings on examination of blood, without diagnosis
CategoryR76Other abnormal immunological findings in serum
This CodeR76Other abnormal immunological findings in serum

Specific Coding for Other abnormal immunological findings in serumOverview

Non-specific codes like R76 require more characters. Use one of these billable codes instead:

  • Use R76.0 for Raised antibody titer

  • R76.1 for Nonspecific reaction to test for tuberculosis

  • Use R76.11 for Nonspecific reaction to tuberculin skin test without active tuberculosis

  • Use R76.12 for Nonspecific reaction to cell mediated immunity measurement of gamma interferon antigen response without active tuberculosis

  • R76.8 for Other specified abnormal immunological findings in serum

  • Use R76.81 for Abnormal rheumatoid factor and anti-citrullinated protein antibody without rheumatoid arthritis

  • Use R76.89 for Other specified abnormal immunological findings in serum

  • Use R76.9 for Abnormal immunological finding in serum, unspecified

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About R76Overview

Is R76 (Other abnormal immunological findings in serum) a billable code?

No. This is a category header that groups the codes for other abnormal immunological findings in serum, and headers cannot be submitted on claims. Claims for other abnormal immunological findings in serum need a more specific code from this category, such as R76.0, R76.11, and R76.12.

Can R76 be a principal diagnosis?

Use it with care. This is a symptom code, so once a definitive diagnosis explaining the other abnormal immunological findings in serum is established, that condition takes the principal position instead.