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 97654-8: SMN2 copy num Molgen (Bld/Tiss) [Entitic number]

Name: LOINC Code 97654-8: SMN2 copy num Molgen (Bld/Tiss) [Entitic number]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:29.660Z

97654-8 is a LOINC code used to identify SMN2 copy num Molgen (Bld/Tiss) [Entitic number] 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 SMN2 gene copy number. It is commonly used with the system or sample type Bld/Tiss.

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 SMN2 gene copy number. It is commonly used with the system or sample type Bld/Tiss.

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
Method: Molgen

What it does not mean

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

Key facts

SMN2 gene copy number in Blood or Tissue by Molecular genetics method

SMN2 gene copy number

The SMN2 copy number varies from 0 to 3 copies in the population, with about 10-15% of unaffected individuals having no SMN2 gene. The SMN2 copy number does not impact the carrier status but rather influences severity of disease in patients with spinal muscular atrophy (SMA), where the presence of more copies is associated with milder disease.[PMID21673580]

BCD541; Blood; C-BCD541; Entitic; Entitic number; GEMIN1; Gemin-1; Molecular genetics; Molecular pathology; MOLPATH; No; Num; PCR; Point in time; QNT; Quan; Quant; Quantitative; Random; SMN; SMN2 copy num; SMNC; SMNT; survival of motor neuron 2, centromeric; TDRD16B; Tissue; Tissue, unspecified; WB; Whole blood; Whole blood or Tissue

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

SMN2 copy num Molgen (Bld/Tiss) [Entitic number]SMN2 gene copy number in Blood or Tissue by Molecular genetics methodSMN2 copy num EntNum Bld/TSMN2 gene copy numberMOLPATHSMN2 copy number, Blood or tissue specimenEntNum

Frequently asked questions

Code details

Code97654-8

SystemLOINC

Display nameSMN2 copy num Molgen (Bld/Tiss) [Entitic number]

DescriptionSMN2 gene copy number

Short nameSMN2 copy num EntNum Bld/T

ComponentSMN2 gene copy number

PropertyEntNum

TimingPt

System (specimen)Bld/Tiss

ScaleQn

MethodMolgen

ClassMOLPATH

Example units#

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.70

Last changed2.72

Consumer names

SMN2 copy number, Blood or tissue specimen

Part names

SMN2 gene copy numberEntNumPtBld/TissQnMolgenEntitic numberPoint in time (spot)Blood or TissueMolecular genetics

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.