LOINCActiveObservation

LOINC Code 10591-6: Primary Spermatocytes (Sem) [#/Vol]

10591-6 is a LOINC code used to identify Primary Spermatocytes (Sem) [#/Vol] 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 Spermatocytes.primary. It is commonly used with the system or sample type Semen.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Spermatocytes.primary. It is commonly used with the system or sample type Semen.

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

  • Primary Spermatocytes [#/volume] in Semen
  • Spermatocytes.primary
  • #; ABS; absolute; absolutes; Cnt; Count; Count/volume; CT; Ejaculate; FERTILITY TESTING; Genitourinary; GU; Number concentration; Number Concentration (count/vol); Point in time; Primary Spermatocytes; QNT; Quan; Quant; Quantitative; Random; Sem; Seminal fluid; Smn; SMPLS; 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

Primary Spermatocytes (Sem) [#/Vol]Primary Spermatocytes [#/volume] in SemenPrimary Spermatocytes # SmnSpermatocytes.primaryFERTPrimary spermatocytes, SemenNCnc

Frequently asked questions

Code details

Code10591-6
SystemLOINC
Display namePrimary Spermatocytes (Sem) [#/Vol]
DescriptionSpermatocytes.primary
Short namePrimary Spermatocytes # Smn
ComponentSpermatocytes.primary
PropertyNCnc
TimingPt
System (specimen)Semen
ScaleQn
ClassFERT
Example units/L
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0i
Last changed2.73

Consumer names

Primary spermatocytes, Semen

Part names

Spermatocytes.primaryNCncPtSemenQnPrimary SpermatocytesNumber ConcentrationPoint 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 10591-6 | HealthAssure