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.

LOINCObservation

LOINC Code 12188-9: CK.MB EIA [Catalytic fraction]

Name: LOINC Code 12188-9: CK.MB EIA [Catalytic fraction]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:22.975Z

12188-9 is a LOINC code used to identify CK.MB EIA [Catalytic fraction] 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 Creatine kinase.MB/Creatine kinase.total. It is commonly used with the system or sample type Ser/Plas.

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 Creatine kinase.MB/Creatine kinase.total. It is commonly used with the system or sample type Ser/Plas.

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: Observation
Method: EIA

What it does not mean

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

Key facts

Deprecated Creatine kinase.MB/Creatine kinase.total
Creatine kinase.MB/Creatine kinase.total
Catalytic Fraction; Chemistry; CK; CK 2; CK MB; CK-2; CKMB; CK-MB; CPK; Creatine phosphokinase; ELFA; ELISA; Enzyme immunoassay; IAA; MEIA; Percent; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; SUDS; Tot; Totl

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

CK.MB EIA [Catalytic fraction]Deprecated Creatine kinase.MB/Creatine kinase.totalDeprecated CK MB/CK Fr SerPl EIACreatine kinase.MB/Creatine kinase.totalCHEMCreatine Kinase-MB Form (CK-MB), BloodCFr

Frequently asked questions

Code details

Code12188-9

SystemLOINC

Display nameCK.MB EIA [Catalytic fraction]

DescriptionCreatine kinase.MB/Creatine kinase.total

Short nameDeprecated CK MB/CK Fr SerPl EIA

ComponentCreatine kinase.MB/Creatine kinase.total

PropertyCFr

TimingPt

System (specimen)Ser/Plas

ScaleQn

MethodEIA

ClassCHEM

Example units%

StatusDEPRECATED

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0j-a

Last changed2.70

Consumer names

Creatine Kinase-MB Form (CK-MB), Blood

Part names

Creatine kinase.MB/Creatine kinase.totalCFrPtSer/PlasQnEIACatalytic FractionPoint in time (spot)Serum or PlasmaImmunoassay (EIA)

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.