What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 81189-3: Tumor regression post preoperative therapy Ql (Tumor)

Name: LOINC Code 81189-3: Tumor regression post preoperative therapy Ql (Tumor)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:05.774Z

81189-3 is a LOINC code used to identify Tumor regression post preoperative therapy Ql (Tumor) 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 Tumor regression^post preoperative therapy. It is commonly used with the system or sample type Tumor.

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 Tumor regression^post preoperative therapy. It is commonly used with the system or sample type Tumor.

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

Tumor regression [Type] in Tumor --post preoperative therapy
Tumor regression^post preoperative therapy
The degree of tumor regression (complete, moderate, minimal, poor) after preoperative chemo- and/or radiation therapy.
After; Cancer; Ordinal; p preop therapy; PATHOLOGY; Point in time; Pre-Op; PST; QL; Qual; Qualitative; Random; Screen; tumors; tumour; tumours; 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

Tumor regression post preoperative therapy Ql (Tumor)Tumor regression [Type] in Tumor --post preoperative therapyTumor regression p preop therapyTumor regression^post preoperative therapyPATHTumor regression after Preoperative Therapy, TumorType

Frequently asked questions

Code details

Code81189-3

SystemLOINC

Display nameTumor regression post preoperative therapy Ql (Tumor)

DescriptionTumor regression^post preoperative therapy

Short nameTumor regression p preop therapy

ComponentTumor regression^post preoperative therapy

PropertyType

TimingPt

System (specimen)Tumor

ScaleOrd

ClassPATH

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.56

Last changed2.56

Consumer names

Tumor regression after Preoperative Therapy, Tumor

Part names

Tumor regression^post preoperative therapyTypePtTumorOrdPoint 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.