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LOINC Code 78771-3: 9-Hydroxyrisperidone (Hair) [Mass/Mass]

78771-3 is a LOINC code used to identify 9-Hydroxyrisperidone (Hair) [Mass/Mass] 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 9-Hydroxyrisperidone. It is commonly used with the system or sample type Hair.

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 9-Hydroxyrisperidone. It is commonly used with the system or sample type Hair.

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

9-Hydroxyrisperidone [Mass/mass] in Hair
9-Hydroxyrisperidone
In general hair analysis provides a longer surveillance window for drug use than other methods because hair retains drugs longer (weeks or months, compared with days detectable in blood or urine). Collecting hair specimens is also less invasive than urine or blood sampling and provides a simple and fast method for detection and quantification of Risperidone (RSP) and its major metabolite, 9-hydroxyrisperidone (9-OH-RSP). One study suggests a better relationship between the administered dose and hair concentration for 9-OH-RSP, than for the parent drug. [PMID19595645] Drawbacks for hair analysis include expense, and environmental contamination of the specimen.
9-Hydroxy risperidone; 9-Hydroxy-risperidone; 9-OH-Risperidone; 9OH-risperidone; DRUG/TOXICOLOGY; Drugs; Har; Invega; Mass content; Paliperidone; Point in time; QNT; Quan; Quant; Quantitative; Random; Risperidone metabolite

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

9-Hydroxyrisperidone (Hair) [Mass/Mass]9-Hydroxyrisperidone [Mass/mass] in Hair9OH-risperidone Hair-mCnt9-HydroxyrisperidoneDRUG/TOX9-Hydroxyrisperidone, HairMCnt

Frequently asked questions

Code details

Code78771-3
SystemLOINC
Display name9-Hydroxyrisperidone (Hair) [Mass/Mass]
Description9-Hydroxyrisperidone
Short name9OH-risperidone Hair-mCnt
Component9-Hydroxyrisperidone
PropertyMCnt
TimingPt
System (specimen)Hair
ScaleQn
ClassDRUG/TOX
Example unitspg/mg
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.54
Last changed2.54

Consumer names

9-Hydroxyrisperidone, Hair

Part names

9-HydroxyrisperidoneMCntPtHairQnMass ContentPoint in time (spot)

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.