LOINCBoth

LOINC Code 13121-9: Ribosomal P protein Ab (S)

13121-9 is a LOINC code used to identify Ribosomal P protein Ab (S) 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 Ribosomal P protein Ab. 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 Ribosomal P protein Ab. 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: DEPRECATED
  • Order vs observation: Both

What it does not mean

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

Key facts

  • Deprecated Ribosomal P protein Ab
  • Ribosomal P protein Ab
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; P prime; Point in time; PR; Prot; Random; Ribosomal P Protein; Rib-P; RPP; 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

Ribosomal P protein Ab (S)Deprecated Ribosomal P protein AbDeprecated Ribosomal P protein Ab SerRibosomal P protein AbSERORibosomal P Protein antibody, BloodACnc

Frequently asked questions

Code details

Code13121-9
SystemLOINC
Display nameRibosomal P protein Ab (S)
DescriptionRibosomal P protein Ab
Short nameDeprecated Ribosomal P protein Ab Ser
ComponentRibosomal P protein Ab
PropertyACnc
TimingPt
System (specimen)Ser
ScaleOrdQn
ClassSERO
StatusDEPRECATED
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0j-a
Last changed2.36

Consumer names

Ribosomal P Protein antibody, Blood

Part names

Ribosomal P protein AbACncPtSerOrdQnArbitrary ConcentrationPoint 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.

LOINC Code 13121-9 | HealthAssure