LOINCActiveBoth

LOINC Code 90263-5: Microscopic observation Gram stain Nom (Milk)

90263-5 is a LOINC code used to identify Microscopic observation Gram stain Nom (Milk) 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 Milk.

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 Milk.

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: Gram stain

What it does not mean

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

Key facts

Microscopic observation [Identifier] in Milk by Gram stain
Observation
Milk specimens can be tested for infectious organisms as part of regulatory testing, quality control, or during an infectious disease outbreak. Typically, microorganisms that survive pasteurization are gram-positive, and gram-negative bacteria do not survive the process of pasteurization; however, if any gram-negative organisms do survive, they tend to spoil milk more quickly than gram-positive organisms. [https//dairyextension.foodscience.cornell.edu/sites/dairyextension.foodscience.cornell.edu/files/shared/Diary%20Microbiology.pdf]
Gram Stn; ID; Identity or presence; Infectious Disease; InfectiousDisease; Microbiology; Mlk; Nominal; Point in time; Random; St; Stains; Stn

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 Gram stain Nom (Milk)Microscopic observation [Identifier] in Milk by Gram stainGram Stn MlkObservationMICROMicroscopic observation, MilkPrid

Frequently asked questions

Code details

Code90263-5
SystemLOINC
Display nameMicroscopic observation Gram stain Nom (Milk)
DescriptionObservation
Short nameGram Stn Mlk
ComponentObservation
PropertyPrid
TimingPt
System (specimen)Milk
ScaleNom
MethodGram stain
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.65
Last changed2.78

Consumer names

Microscopic observation, Milk

Part names

ObservationPridPtMilkNomGram stainPresence or IdentityPoint 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.

LOINC Code 90263-5 | HealthAssure