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.

LOINCActive

LOINC Code 21833-9: Alternate census tract at cancer diagnosis

Name: LOINC Code 21833-9: Alternate census tract at cancer diagnosis
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:30.107Z

21833-9 is a LOINC code used to identify Alternate census tract at cancer diagnosis 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 Alternate census tract at cancer XXX Dx. 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 Alternate census tract at cancer XXX Dx. 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

What it does not mean

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

Key facts

Alternate census tract at cancer diagnosis

Alternate census tract at cancer XXX Dx

This field is provided for coding census tract of patient's residence at time of diagnosis. See Census Tract 1970/80/90 [110]. Codes are those used by the U.S. Census Bureau for the Year 2000 Census. Census tract codes have a 4-digit basic number and also may have a 2-digit suffix. Census tract numbers range from 0001.01 to 9999.98. See the Census Bureau's "Area Classifications" at the following websitehttp://www.census.gov/prod/cen2000/doc/sf1.pdf for further details. Census tract codes allow central registries to calculate incidence rates for geographical areas having population estimates. This field allows a central registry to add Year 2000 Census tracts to tumors diagnosed in previous years, without losing the codes in data item 110. The Census Bureau provides population data for census tracts. Those rates can be used for general surveillance or special geographical and socioeconomic analysis. Because census tracts for particular cases can change between censuses, the central registry may wish to assign an alternate census tract code to its cases. For example, a registry may code its 1985 cases using both the 1980 and 1990 census tract boundaries. The central registry can use this information for different comparisons... NAACCR Data Standards and Data Dictionary Version 11

Alternate census tract at cancer Dx; Diagnosis; Ident; Identifier; Nominal; Oncology; Point in time; Random; TUMOR REGISTRY(NAACCR)

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

Alternate census tract at cancer diagnosisAlternate census tract at cancer DxAlternate census tract at cancer XXX DxTUMRRGTIDPt^Patient

Frequently asked questions

Code details

Code21833-9

SystemLOINC

Display nameAlternate census tract at cancer diagnosis

DescriptionAlternate census tract at cancer XXX Dx

Short nameAlternate census tract at cancer Dx

ComponentAlternate census tract at cancer XXX Dx

PropertyID

TimingPt

System (specimen)^Patient

ScaleNom

ClassTUMRRGT

StatusACTIVE

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0m

Last changed2.32

Part names

Alternate census tract at cancer XXX DxIDPt^PatientNomIdentifierPoint 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.