LOINC

LOINC Code 64042-5: Distance from the free gingival margin, FGM, to the sulcus base, SB Tooth [PhenX]

64042-5 is a LOINC code used to identify Distance from the free gingival margin, FGM, to the sulcus base, SB Tooth [PhenX] 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 Distance from the free gingival margin, FGM, to the sulcus base, SB. It is commonly used with the system or sample type Tooth.

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 Distance from the free gingival margin, FGM, to the sulcus base, SB. It is commonly used with the system or sample type Tooth.

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: TRIAL
  • Method: PhenX

What it does not mean

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

Key facts

  • Distance from the free gingival margin, FGM, to the sulcus base, SB Tooth [PhenX]
  • Distance from the free gingival margin, FGM, to the sulcus base, SB
  • Distance FGM to SB; FR; Length; Non-protein bound; 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

Distance from the free gingival margin, FGM, to the sulcus base, SB Tooth [PhenX]Distance FGM to SB Tooth PhenXDistance from the free gingival margin, FGM, to the sulcus base, SBPHENXLenPtTooth

Frequently asked questions

Code details

Code64042-5
SystemLOINC
Display nameDistance from the free gingival margin, FGM, to the sulcus base, SB Tooth [PhenX]
DescriptionDistance from the free gingival margin, FGM, to the sulcus base, SB
Short nameDistance FGM to SB Tooth PhenX
ComponentDistance from the free gingival margin, FGM, to the sulcus base, SB
PropertyLen
TimingPt
System (specimen)Tooth
ScaleQn
MethodPhenX
ClassPHENX
Example unitsmm
StatusTRIAL

Flags

BillableNo
Valid clinical useNo

Source

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

Part names

Distance from the free gingival margin, FGM, to the sulcus base, SBLenPtToothQnPhenXLengthPoint 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.