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LOINC Code 80121-7: Acyclovir (CSF) [Mass/Vol]

80121-7 is a LOINC code used to identify Acyclovir (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 Acyclovir. 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 Acyclovir. 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

Acyclovir [Mass/volume] in Cerebral spinal fluid
Acyclovir
The central nervous system (CNS) is an important sanctuary site for HIV replication. Studies measuring the penetration of antiretroviral drugs (such as acyclovir) are performed using the cerebral spinal fluid (CSF) of HIV positive patients in treatment, to help clinicians design treatment regimens that eliminate the virus, and still provide neuroprotective effects. [PMID12153332]
Aciclovir; Acifur; ACV; Acycloguanosine; Avirax; Cerebral spinal fluid; Cerebrospinal Fl; DRUG/TOXICOLOGY; Drugs; Level; Mass concentration; Point in time; QNT; Quan; Quant; Quantitative; Random; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Zovirax

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

Acyclovir (CSF) [Mass/Vol]Acyclovir [Mass/volume] in Cerebral spinal fluidAcyclovir CSF-mCncAcyclovirDRUG/TOXAcyclovir, Spinal fluidMCnc

Frequently asked questions

Code details

Code80121-7
SystemLOINC
Display nameAcyclovir (CSF) [Mass/Vol]
DescriptionAcyclovir
Short nameAcyclovir CSF-mCnc
ComponentAcyclovir
PropertyMCnc
TimingPt
System (specimen)CSF
ScaleQn
ClassDRUG/TOX
Example unitsmg/L
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

Acyclovir, Spinal fluid

Part names

AcyclovirMCncPtCSFQnMass 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.

LOINC Code 80121-7 | HealthAssure