LOINCActiveObservation

LOINC Code 105599-5: Mitotic rate (Tiss) [#/Area]

105599-5 is a LOINC code used to identify Mitotic rate (Tiss) [#/Area] 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 Mitotic rate. It is commonly used with the system or sample type Tiss.

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 Mitotic rate. It is commonly used with the system or sample type Tiss.

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

  • Mitotic rate [#/area] in Tissue
  • Mitotic rate
  • #/area; Number areic; Pathology; Point in time; QNT; Quan; Quant; Quantitative; Random; Tissue; Tissue, unspecified

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

Mitotic rate (Tiss) [#/Area]Mitotic rate [#/area] in TissueMitotic rate #/area TissMitotic ratePATHMitotic rate, TissueNaric

Frequently asked questions

Code details

Code105599-5
SystemLOINC
Display nameMitotic rate (Tiss) [#/Area]
DescriptionMitotic rate
Short nameMitotic rate #/area Tiss
ComponentMitotic rate
PropertyNaric
TimingPt
System (specimen)Tiss
ScaleQn
ClassPATH
Example units/[HPF]
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.78
Last changed2.78

Consumer names

Mitotic rate, Tissue

Part names

Mitotic rateNaricPtTissQnNumber Areic (per area)Point in time (spot)Tissue and Smears

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 105599-5 | HealthAssure