R76.81

Billable

ChapterR00–R99

Ranksubcategory

Official Description

Abnormal rheumatoid factor and anti-citrullinated protein antibody without rheumatoid arthritis

Metadata & Insights

•2026 ICD-10-CM Edition - Effective October 1, 2025.
•Billable/specific code (valid for reimbursement).
•Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings (R00-R99).

Instructional Notes

Includes

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

Excludes1(Not coded here)

rheumatoid arthritis with rheumatoid factor (M05.-)

General instructions are available for the parent sections:

View CH18 Notes View R70-R79 Notes

Clinical Hierarchy

CH18Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

R70-R79Abnormal findings on examination of blood, without diagnosis (R70-R79)

R76Other abnormal immunological findings in serum

R76.8Other specified abnormal immunological findings in serum

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

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to R76.81:

blockR70-R79

Abnormal findings on examination of blood, without diagnosis (R70-R79)

View context instructions

chapterCH18

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)

View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to R76.81. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

3 raw paths

Abnormal, abnormality, abnormalities3 unique routes

anti-CCP (cyclic citrullinated protein)→R76.81

anti-cyclic citrullinated protein antibody and rheumatoid factor→R76.81

rheumatoid factor and anti-citrullinated protein antibody

without rheumatoid arthritis→R76.81