LOINC

LOINC Code 29491-8: Deprecated Special attachment request modifier codes

29491-8 is a LOINC code used to identify Deprecated Special attachment request modifier codes 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 Special attachment request modifier codes. 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 Special attachment request modifier codes. 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: DEPRECATED

What it does not mean

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

Key facts

  • Deprecated Special attachment request modifier codes
  • Special attachment request modifier codes
  • ATTACH.MODIFIER; Complex

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

Deprecated Special attachment request modifier codesDeprecatedSpecial attachment request modifier codesATTACH.MODIFIERCmplx-^Patient

Frequently asked questions

Code details

Code29491-8
SystemLOINC
Display nameDeprecated Special attachment request modifier codes
DescriptionSpecial attachment request modifier codes
Short nameDeprecated
ComponentSpecial attachment request modifier codes
PropertyCmplx
Timing-
System (specimen)^Patient
ScaleSet
ClassATTACH.MODIFIER
StatusDEPRECATED

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.03
Last changed2.68

Part names

Special attachment request modifier codesCmplx-^PatientSetComplex

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 29491-8 | HealthAssure