What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 46435-4: Rheumatoid factor and Cyclic citrullinated peptide IgG (S) [Interp]

Name: LOINC Code 46435-4: Rheumatoid factor and Cyclic citrullinated peptide IgG (S) [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:31.752Z

46435-4 is a LOINC code used to identify Rheumatoid factor and Cyclic citrullinated peptide IgG (S) [Interp] in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Rheumatoid factor & Cyclic citrullinated peptide Ab.IgG. It is commonly used with the system or sample type Ser.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Rheumatoid factor & Cyclic citrullinated peptide Ab.IgG. It is commonly used with the system or sample type Ser.

When is it used?

Used in lab systems, EHRs, and clinical data exchange.
May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
Status: ACTIVE
Order vs observation: Observation

What it does not mean

The code identifies the observation or test, not the actual result.

Key facts

Rheumatoid factor and Cyclic citrullinated peptide IgG Ab [Interpretation] in Serum
Rheumatoid factor & Cyclic citrullinated peptide Ab.IgG
ABS; Aby; Antby; Anti; Antibodies; Antibody; Anti-CCP; Autoantibodies; Autoantibody; cCP; CCP3; Cyclic Citrulinated Peptide; Fac; Fact; Immune globulin G; Immunoglobulin G; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Nominal; Pept; Point in time; Random; RF; RF+cCP; Rheum; Rheumatoid arthritis; Rheumatology; Serology; Serum; SR

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Rheumatoid factor and Cyclic citrullinated peptide IgG (S) [Interp]Rheumatoid factor and Cyclic citrullinated peptide IgG Ab [Interpretation] in SerumRF+cCP IgG Ser-ImpRheumatoid factor & Cyclic citrullinated peptide Ab.IgGSERORheumatoid factor and Cyclic Citrullinated peptide IgG antibody, BloodImp

Frequently asked questions

Code details

Code46435-4

SystemLOINC

Display nameRheumatoid factor and Cyclic citrullinated peptide IgG (S) [Interp]

DescriptionRheumatoid factor & Cyclic citrullinated peptide Ab.IgG

Short nameRF+cCP IgG Ser-Imp

ComponentRheumatoid factor & Cyclic citrullinated peptide Ab.IgG

PropertyImp

TimingPt

System (specimen)Ser

ScaleNom

ClassSERO

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.19

Last changed2.38

Consumer names

Rheumatoid factor and Cyclic Citrullinated peptide IgG antibody, Blood

Part names

Rheumatoid factor & cyclic citrullinated peptide Ab.IgGImpPtSerNomRheumatoid Factor and Cyclic Citrullinated Peptide IgGImpression/interpretation of studyPoint in time (spot)Serum

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.