LOINCActive

LOINC Code 66017-5: Illness duration [DI-PAD]

66017-5 is a LOINC code used to identify Illness duration [DI-PAD] 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 Illness duration. 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 Illness duration. 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
  • Method: DI-PAD CGP V 1.4

What it does not mean

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

Key facts

Illness duration [DI-PAD]
Illness duration
Total duration of illness includes Prodromal and Residual disabilities as well as the active phase of illness. This must be calculated from first onset of disorder regardless of pattern or course of illness. Prodromal or residual phase is when any 2 of the following symptoms are present before (prodromal) or after (residual) an active episodeRange is 00-99. Maximum is 99
Durat; PhenX; Point in time; QNT; Quan; Quant; Quantitative; Random

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

Illness duration [DI-PAD]Illness duration DI-PADIllness durationPHENXTimePt^Patient

Frequently asked questions

Code details

Code66017-5
SystemLOINC
Display nameIllness duration [DI-PAD]
DescriptionIllness duration
Short nameIllness duration DI-PAD
ComponentIllness duration
PropertyTime
TimingPt
System (specimen)^Patient
ScaleQn
MethodDI-PAD CGP V 1.4
ClassPHENX
Example unitsD, W, Mo, Y
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.36
Last changed2.65

Part names

Illness durationTimePt^PatientQnDI-PAD CGP V 1.4Time (e.g. seconds)Point in time (spot)DI-PAD

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 66017-5 | HealthAssure