LOINCActiveBoth

LOINC Code 18500-9: Microscopic observation Cyto stain.thin prep Nom (Cvx)

18500-9 is a LOINC code used to identify Microscopic observation Cyto stain.thin prep Nom (Cvx) 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 Observation. It is commonly used with the system or sample type Cvx.

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 Observation. It is commonly used with the system or sample type Cvx.

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: Cyto stain.thin prep

What it does not mean

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

Key facts

  • Microscopic observation [Identifier] in Cervix by Cyto stain.thin prep
  • Observation
  • Thin prep is an automated method of preparing the smear;cells are first treated/lysed to diminish obstructions such as blood, then spread very thinly by the machine.
  • Cervix; CYTOLOGY; Cytology stain; Cytostain; Genital tract; Gyn; Gynecology; Identity or presence; Nominal; OB; ObGyn; Obstetrics; Pap Smear; Pap Stain; Papanicolaou smear; Point in time; Random; St; Stains; Stn; UniversalLabOrders

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

Microscopic observation Cyto stain.thin prep Nom (Cvx)Microscopic observation [Identifier] in Cervix by Cyto stain.thin prepThin Prep CvxObservationCYTOMicroscopic observation, CervixPrid

Frequently asked questions

Code details

Code18500-9
SystemLOINC
Display nameMicroscopic observation Cyto stain.thin prep Nom (Cvx)
DescriptionObservation
Short nameThin Prep Cvx
ComponentObservation
PropertyPrid
TimingPt
System (specimen)Cvx
ScaleNom
MethodCyto stain.thin prep
ClassCYTO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.78

Consumer names

Microscopic observation, Cervix

Part names

ObservationPridPtCvxNomCyto stain.thin prepPresence or IdentityPoint in time (spot)Cervix

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 18500-9 | HealthAssure