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.

LOINC

LOINC Code 18643-7: Deprecated Psychiatric rehabilitation treatment plan, Start date of hospitalization leading to treatment

Name: LOINC Code 18643-7: Deprecated Psychiatric rehabilitation treatment plan, Start date of hospitalization leading to treatment
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:27.591Z

18643-7 is a LOINC code used to identify Deprecated Psychiatric rehabilitation treatment plan, Start date of hospitalization leading to treatment 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 Start date. It is commonly used with the system or sample type Hospitalization leading to psychiatric rehabilitation treatment.

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 Start date. It is commonly used with the system or sample type Hospitalization leading to psychiatric rehabilitation treatment.

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 Psychiatric rehabilitation treatment plan, Start date of hospitalization leading to treatment
Start date
ATTACH; ATTACH.REHAB; ATTACH.REHAB.PSYCH; Hospitalization leading to psychiatric rehabilitation Tx; Mental health; MentalHealth; Point in time; Psych; Psychiatric rehabilitation Tx; Psychiatry; QNT; Quan; Quant; Quantitative; Random; RehabTx; Started; Tx

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 Psychiatric rehabilitation treatment plan, Start date of hospitalization leading to treatmentDeprecatedStart dateATTACH.REHAB.PSYCHDatePtHospitalization leading to psychiatric rehabilitation treatment

Frequently asked questions

Code details

Code18643-7

SystemLOINC

Display nameDeprecated Psychiatric rehabilitation treatment plan, Start date of hospitalization leading to treatment

DescriptionStart date

Short nameDeprecated

ComponentStart date

PropertyDate

TimingPt

System (specimen)Hospitalization leading to psychiatric rehabilitation treatment

ScaleQn

ClassATTACH.REHAB.PSYCH

Example unitsMMDDYY

StatusDEPRECATED

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0l

Last changed2.66

Part names

Start dateDatePtHospitalization leading to psychiatric rehabilitation treatmentQnPoint 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.