LOINCActiveObservation

LOINC Code 44640-1: Histologic type Nom (Skin melanoma)

44640-1 is a LOINC code used to identify Histologic type Nom (Skin melanoma) 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 Histologic type. It is commonly used with the system or sample type Skin melanoma.

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 Histologic type. It is commonly used with the system or sample type Skin melanoma.

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
  • Order vs observation: Observation

What it does not mean

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

Key facts

  • Histologic type in Skin melanoma
  • Histologic type
  • Dermatologic; Epidermis; Histo type; Integument; Nominal; PATH.HISTO; PATHOLOGY; Point in time; Random; Skn; Typ

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

Histologic type Nom (Skin melanoma)Histologic type in Skin melanomaHisto type MelHistologic typePATH.HISTOHistologic type, Skin MelanomaType

Frequently asked questions

Code details

Code44640-1
SystemLOINC
Display nameHistologic type Nom (Skin melanoma)
DescriptionHistologic type
Short nameHisto type Mel
ComponentHistologic type
PropertyType
TimingPt
System (specimen)Skin melanoma
ScaleNom
ClassPATH.HISTO
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.17
Last changed2.61

Consumer names

Histologic type, Skin Melanoma

Part names

Histologic typeTypePtSkin melanomaNomPoint 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 44640-1 | HealthAssure