LOINCActiveObservation

LOINC Code 97793-4: AO modifiers

97793-4 is a LOINC code used to identify AO modifiers 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 AO modifiers. It is commonly used with the system or sample type ^Patient.

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 AO modifiers. It is commonly used with the system or sample type ^Patient.

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: Observation

What it does not mean

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

Key facts

  • AO modifiers
  • MSK; Musculoskeletal; Nominal; Ortho; Orthopedics; Point in time; Random; SURG; Typ

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

AO modifiersSURGTypePt^PatientNomPoint in time (spot)

Frequently asked questions

Code details

Code97793-4
SystemLOINC
Display nameAO modifiers
Short nameAO modifiers
ComponentAO modifiers
PropertyType
TimingPt
System (specimen)^Patient
ScaleNom
ClassSURG
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.70
Last changed2.70

Part names

AO modifiersTypePt^PatientNomPoint 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 97793-4 | HealthAssure