LOINCActiveObservation

LOINC Code 10555-1: Acrosin (Spermatozoa) [Entitic Catalytic Activity]

10555-1 is a LOINC code used to identify Acrosin (Spermatozoa) [Entitic Catalytic Activity] 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 Acrosin. It is commonly used with the system or sample type Spermatozoa.

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 Acrosin. It is commonly used with the system or sample type Spermatozoa.

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

  • Acrosin [Entitic Catalytic Activity] in Spermatozoa
  • Acrosin
  • Acrosomal proteinase; Entitic catalytic activity; FERTILITY TESTING; Genitourinary; GU; Point in time; QNT; Quan; Quant; Quantitative; Random; Spermatazoa; Sprm; URO; Urology

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

Acrosin (Spermatozoa) [Entitic Catalytic Activity]Acrosin [Entitic Catalytic Activity] in SpermatozoaAcrosin Sprm QnAcrosinFERTAcrosin, SpermatozoaEntCat

Frequently asked questions

Code details

Code10555-1
SystemLOINC
Display nameAcrosin (Spermatozoa) [Entitic Catalytic Activity]
DescriptionAcrosin
Short nameAcrosin Sprm Qn
ComponentAcrosin
PropertyEntCat
TimingPt
System (specimen)Spermatozoa
ScaleQn
ClassFERT
Example unitsAKat
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0i
Last changed2.70

Consumer names

Acrosin, Spermatozoa

Part names

AcrosinEntCatPtSpermatozoaQnEntitic Catalytic ActivityPoint 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 10555-1 | HealthAssure