LOINCActiveBoth

LOINC Code 42635-3: Chr 12p tetrasomy Molgen Ql (Fixed tissue)

42635-3 is a LOINC code used to identify Chr 12p tetrasomy Molgen Ql (Fixed tissue) 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 Chromosome 12p tetrasomy. It is commonly used with the system or sample type Tiss fixed.

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 Chromosome 12p tetrasomy. It is commonly used with the system or sample type Tiss fixed.

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

  • Chromosome 12p tetrasomy [Presence] in Fixed tissue by Molecular genetics method
  • Chromosome 12p tetrasomy
  • Arbitrary; Chr 12p tetrasomy; Chromosom; Chromosomes; Fixed tissue; Ftis; Isochromosome 12p; Killian Syndrome; Killian/Teschler-Nicola Syndrome; Molecular genetics; Molecular pathology; MOLPATH; Ordinal; Pallister Killian Mosaic Syndrome; Pallister Mosaic Syndrome; PCR; Point in time; QL; Qual; Qualitative; Random; Screen; Teschler-Nicola/Killian Syndrome; Tissue; Tissue, unspecified

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

Chr 12p tetrasomy Molgen Ql (Fixed tissue)Chromosome 12p tetrasomy [Presence] in Fixed tissue by Molecular genetics methodChr 12p tetrasomy Ftis QlChromosome 12p tetrasomyMOLPATHChromosome 12p tetrasomy, Fixed tissueArb

Frequently asked questions

Code details

Code42635-3
SystemLOINC
Display nameChr 12p tetrasomy Molgen Ql (Fixed tissue)
DescriptionChromosome 12p tetrasomy
Short nameChr 12p tetrasomy Ftis Ql
ComponentChromosome 12p tetrasomy
PropertyArb
TimingPt
System (specimen)Tiss fixed
ScaleOrd
MethodMolgen
ClassMOLPATH
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.16
Last changed2.66

Consumer names

Chromosome 12p tetrasomy, Fixed tissue

Part names

Chromosome 12p tetrasomyArbPtTiss fixedOrdMolgenArbitraryPoint in time (spot)Fixed 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.

LOINC Code 42635-3 | HealthAssure