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.

LOINCActiveBoth

LOINC Code 2638-5: Myelin basic protein (CSF) [Mass/Vol]

Name: LOINC Code 2638-5: Myelin basic protein (CSF) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

2638-5 is a LOINC code used to identify Myelin basic protein (CSF) [Mass/Vol] 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 Myelin basic protein. It is commonly used with the system or sample type CSF.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Myelin basic protein. It is commonly used with the system or sample type CSF.

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: Both

What it does not mean

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

Key facts

Myelin basic protein [Mass/volume] in Cerebral spinal fluid
Myelin basic protein
Cerebral spinal fluid; Cerebrospinal Fl; Chemistry; Level; Mass concentration; MBP; Neuro; Neurology; Point in time; PR; Prot; QNT; Quan; Quant; Quantitative; Random; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; UniversalLabOrders

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Myelin basic protein (CSF) [Mass/Vol] (2638-5)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Myelin basic protein (CSF) [Mass/Vol]Myelin basic protein [Mass/volume] in Cerebral spinal fluidMBP CSF-mCncMyelin basic proteinCHEMMyelin basic protein, Spinal fluidMCnc

Frequently asked questions

Code details

Code2638-5

SystemLOINC

Display nameMyelin basic protein (CSF) [Mass/Vol]

DescriptionMyelin basic protein

Short nameMBP CSF-mCnc

ComponentMyelin basic protein

PropertyMCnc

TimingPt

System (specimen)CSF

ScaleQn

ClassCHEM

Example unitsng/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.73

Consumer names

Myelin basic protein, Spinal fluid

Part names

Myelin basic proteinMCncPtCSFQnMass ConcentrationPoint in time (spot)Cerebral spinal fluid

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.