LOINCActiveObservation

LOINC Code 55066-5: Medicare part A - RUG version code

55066-5 is a LOINC code used to identify Medicare part A - RUG version code 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 Medicare part A - RUG version code. 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 Medicare part A - RUG version code. 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

  • Medicare part A - RUG version code
  • Nominal; Point in time; Random; Resource Utilization Groups; Survey; 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

Medicare part A - RUG version codeSURVEY.CMSTypePt^PatientNomPoint in time (spot)

Frequently asked questions

Code details

Code55066-5
SystemLOINC
Display nameMedicare part A - RUG version code
ComponentMedicare part A - RUG version code
PropertyType
TimingPt
System (specimen)^Patient
ScaleNom
ClassSURVEY.CMS
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.27
Last changed2.63

Part names

Medicare part A - RUG version codeTypePt^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 55066-5 | HealthAssure