What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINC

LOINC Code 10554-4: Prostatic acid phosphatase (Smpls) [Catalytic activity/Vol]

Name: LOINC Code 10554-4: Prostatic acid phosphatase (Smpls) [Catalytic activity/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:19.135Z

10554-4 is a LOINC code used to identify Prostatic acid phosphatase (Smpls) [Catalytic activity/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 Acid phosphatase.prostatic. It is commonly used with the system or sample type Smpls.

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 Acid phosphatase.prostatic. It is commonly used with the system or sample type Smpls.

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: DEPRECATED

What it does not mean

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

Key facts

Deprecated Prostatic acid phosphatase [Enzymatic activity/volume] in Seminal plasma
Acid phosphatase.prostatic
Ac Phos; Acd; Acid phosphatase.total; Acids; AcP; Catalytic Concentration; FERTILITY TESTING; Genitourinary; GU; PACP; PAP; Phos; Phosphtase; Point in time; Prost; Prostate; Prostati; Prostatic ac phos; QNT; Quan; Quant; Quantitative; Random; Tumor marker; 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

Prostatic acid phosphatase (Smpls) [Catalytic activity/Vol]Deprecated Prostatic acid phosphatase [Enzymatic activity/volume] in Seminal plasmaDeprecated PACP-cCncAcid phosphatase.prostaticFERTProstatic acid phosphatase, SmplsCCnc

Frequently asked questions

Code details

Code10554-4

SystemLOINC

Display nameProstatic acid phosphatase (Smpls) [Catalytic activity/Vol]

DescriptionAcid phosphatase.prostatic

Short nameDeprecated PACP-cCnc

ComponentAcid phosphatase.prostatic

PropertyCCnc

TimingPt

System (specimen)Smpls

ScaleQn

ClassFERT

Example unitsukat/L

StatusDEPRECATED

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0i

Last changed2.70

Consumer names

Prostatic acid phosphatase, Smpls

Part names

Acid phosphatase.prostaticCCncPtSmplsQnCatalytic 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.