LOINCActiveObservation

LOINC Code 77985-0: State or province of exposure to illness

77985-0 is a LOINC code used to identify State or province of exposure to illness 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 State or province of exposure to illness. 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 State or province of exposure to illness. 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

  • State or province of exposure to illness
  • The state (or province) in which the disease was likely acquired.
  • Exp; H+P; H+P.HX; Location; Nominal; P prime; Point in time; Random; St or Prov exposure to illness

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

State or province of exposure to illnessSt or Prov exposure to illnessH&P.HXLocPt^PatientNom

Frequently asked questions

Code details

Code77985-0
SystemLOINC
Display nameState or province of exposure to illness
Short nameSt or Prov exposure to illness
ComponentState or province of exposure to illness
PropertyLoc
TimingPt
System (specimen)^Patient
ScaleNom
ClassH&P.HX
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.52
Last changed2.52

Part names

State or province of exposure to illnessLocPt^PatientNomLocationPoint 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.