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Home / ICD-10-CM / Chapter 18: Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99) / Abnormal findings on examination of blood, without diagnosis (R70-R79)

R76.81: Abnormal rheumatoid factor and anti-citrullinated protein antibody without rheumatoid arthritis

ICD-10-CM code R76.81

New code ยท FY2026

Billable: use this code on claims.

  • New code, effective October 1, 2025 (FY2026).

Code breakdown

R76.81

  1. R76CategoryOther abnormal immunological findings in serum
  2. 8Character 4Other specified abnormal immunological findings in serum
  3. 1Character 5Abnormal rheumatoid factor and anti-citrullinated protein antibody without rheumatoid arthritis

Coding notes

Inclusion terms

  • Abnormal anti-CCP
  • Abnormal anti-cyclic citrullinated protein antibody and rheumatoid factor

Excludes1

  • rheumatoid arthritis with rheumatoid factor (M05.-)

Medicare coverage

R76.81 is listed as a covered diagnosis in 2 Medicare billing and coding articles:

  • A55028 Billing and Coding: Lab: Bladder/Urothelial Tumor Markers
  • A56421 Billing and Coding: CT of the Abdomen and Pelvis

Check this code

All FY2026 ICD-10-CM changes

ICD-10-CM codes and descriptions are from the CMS and NCHS code files. Coverage is from the CMS Medicare Coverage Database billing and coding articles.