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LOINC Code 42079-4: Tumor size.collaborative staging

42079-4 is a LOINC code used to identify Tumor size.collaborative staging 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 size.collaborative staging. 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 size.collaborative staging. 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

What it does not mean

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

Key facts

Tumor size.collaborative staging
This item belongs to the set of Collaborative Staging (CS) data items effective with 2004 diagnosis. It is based on and replaces EOD--Tumor size [780]. For most sites, CS Tumor Size is used to record the largest dimension, or the diameter of the primary tumor in millimeters (for example1 mm = 001, 1 cm = 010). See the CS schemes for site-specific variants. For many sites, the CS algorithm uses this data item to derive the Derived AJCC T [2940] according to the sixth edition of AJCC Cancer Staging Manual. CS is a group of data items set up by a joint task force including representatives from SEER, ACoS, CDC, NAACCR, NCRA, and AJCC, designed to provide a single uniform set of codes and rules for coding EOD/ stage information to meet the needs of all of the participating standard setters. CS incorporates all of the fields from SEER 10-digit EOD, in a modified form, and adds several additional fields. When CS data items are coded, a computer algorithm allows generation of AJCC Sixth Edition TNM stage, SEER Summary Stage 1977, and SEER Summary Stage 2000. Separate CS fields are provided in the NAACCR record for these outputs. .. NAACCR Data Standards and Data Dictionary Version 11
Cancer; CS; Length; Oncology; Point in time; QNT; Quan; Quant; Quantitative; Random; TUMOR REGISTRY(NAACCR); Tumor size.CS; tumors; tumour; tumours

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 size.collaborative stagingTumor size.CSTUMRRGTLenPtTumorQn

Frequently asked questions

Code details

Code42079-4
SystemLOINC
Display nameTumor size.collaborative staging
Short nameTumor size.CS
ComponentTumor size.collaborative staging
PropertyLen
TimingPt
System (specimen)Tumor
ScaleQn
ClassTUMRRGT
Example unitsmm;cm
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.16
Last changed2.48

Part names

Tumor size.collaborative stagingLenPtTumorQnLengthPoint 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.

LOINC Code 42079-4 | HealthAssure