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LOINC Code 99971-4: Hemophagocytic lymphohistiocytosis multigene analysis Molgen Doc (Bld/Tiss)

99971-4 is a LOINC code used to identify Hemophagocytic lymphohistiocytosis multigene analysis Molgen Doc (Bld/Tiss) 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 Hemophagocytic lymphohistiocytosis multigene analysis. 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 Hemophagocytic lymphohistiocytosis multigene analysis. 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

Hemophagocytic lymphohistiocytosis multigene analysis in Blood or Tissue by Molecular genetics method
Hemophagocytic lymphohistiocytosis multigene analysis
Multigene analysis for hemophagocytic lymphohistiocytosis (HLH), a syndrome characterized by hyperactivation of the immune system, excessive cytokine secretion and severe systemic inflammation. HLH is classified as familial (FHL) when associated with mutations in specific genes, such as PRF1, UNC13D, STX11, and STXBP2 genes.[PMID33746956] Testing is performed for diagnostic, prognostic, and therapeutic assessment in patients with HLH.
Blood; Document; Finding; Findings; Gene; Gene panel; HLH multigene analysis; Molecular genetics; Molecular pathology; MOLPATH; Multi-gene study; Multiple-gene panel test; PCR; Point in time; Random; 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

Hemophagocytic lymphohistiocytosis multigene analysis Molgen Doc (Bld/Tiss)Hemophagocytic lymphohistiocytosis multigene analysis in Blood or Tissue by Molecular genetics methodHLH multigene analysis Bld/THemophagocytic lymphohistiocytosis multigene analysisMOLPATHHemophagocytic lymphohistiocytosis multigene analysis, Blood or tissue specimenFind

Frequently asked questions

Code details

Code99971-4
SystemLOINC
Display nameHemophagocytic lymphohistiocytosis multigene analysis Molgen Doc (Bld/Tiss)
DescriptionHemophagocytic lymphohistiocytosis multigene analysis
Short nameHLH multigene analysis Bld/T
ComponentHemophagocytic lymphohistiocytosis multigene analysis
PropertyFind
TimingPt
System (specimen)Bld/Tiss
ScaleDoc
MethodMolgen
ClassMOLPATH
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.72
Last changed2.72

Consumer names

Hemophagocytic lymphohistiocytosis multigene analysis, Blood or tissue specimen

Part names

Hemophagocytic lymphohistiocytosis multigene analysisFindPtBld/TissDocMolgenFindingPoint 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.