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.

LOINC

LOINC Code 22553-2: S. pneumoniae 7f Ab spec 1 Qn (S)

Name: LOINC Code 22553-2: S. pneumoniae 7f Ab spec 1 Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:30.110Z

22553-2 is a LOINC code used to identify S. pneumoniae 7f Ab spec 1 Qn (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 Streptococcus pneumoniae 7f Ab^1st specimen. 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 Streptococcus pneumoniae 7f Ab^1st specimen. 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

What it does not mean

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

Key facts

Deprecated Streptococcus pneumoniae 51 Ab [Units/volume] in Serum --1st specimen
Streptococcus pneumoniae 7f Ab^1st specimen
ABS; Aby; Acute specimen; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; First; ID; Infectious Disease; InfectiousDisease; Microbiology; Pneu; pneum; Pneumo; Pneumococ; Pneumococcal; Pneumococcal pneumonia; Pneumococcus; Pneumon; Pneumonia; Point in time; Pre immunization; QNT; Quan; Quant; Quantitative; Random; S pneumo; S pneumoniae; Serum; sp1; Spec; Spn; SR; Strep; Strept

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

S. pneumoniae 7f Ab spec 1 Qn (S)Deprecated Streptococcus pneumoniae 51 Ab [Units/volume] in Serum --1st specimenDeprecated S pneum7f Ab sp1 Ser-aCncStreptococcus pneumoniae 7f Ab^1st specimenMICROStreptococcus pneumoniae 7f antibody specimen 1, BloodACnc

Frequently asked questions

Code details

Code22553-2

SystemLOINC

Display nameS. pneumoniae 7f Ab spec 1 Qn (S)

DescriptionStreptococcus pneumoniae 7f Ab^1st specimen

Short nameDeprecated S pneum7f Ab sp1 Ser-aCnc

ComponentStreptococcus pneumoniae 7f Ab^1st specimen

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

ClassMICRO

StatusDEPRECATED

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0n

Last changed2.69

Consumer names

Streptococcus pneumoniae 7f antibody specimen 1, Blood

Part names

Streptococcus pneumoniae 7f Ab^1st specimenACncPtSerQnArbitrary 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.