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.

LOINCActiveBoth

LOINC Code 80167-0: 2-Amino-4-hydroxypteridine/Creatinine [Molar ratio]

Name: LOINC Code 80167-0: 2-Amino-4-hydroxypteridine/Creatinine [Molar ratio]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:01.839Z

80167-0 is a LOINC code used to identify 2-Amino-4-hydroxypteridine/Creatinine [Molar ratio] 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 2-Amino-4-hydroxypteridine/Creatinine. It is commonly used with the system or sample type Ser/Plas.

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 2-Amino-4-hydroxypteridine/Creatinine. It is commonly used with the system or sample type Ser/Plas.

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: Both

What it does not mean

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

Key facts

2-Amino-4-hydroxypteridine/Creatinine [Molar ratio] in Serum or Plasma
2-Amino-4-hydroxypteridine/Creatinine
2-Amino-4OH-pteridine; Chemistry; CR; Crea; Creat; II; Pl; Plasma; Plsm; Point in time; Pterin; Pterins; QNT; Quan; Quant; Quantitative; Random; Scrto; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Substance concentration ratio; Substance ratio

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

2-Amino-4-hydroxypteridine/Creatinine [Molar ratio]2-Amino-4-hydroxypteridine/Creatinine [Molar ratio] in Serum or Plasma2-Amino-4OH-pteridine/Creat SerPl-sRto2-Amino-4-hydroxypteridine/CreatinineCHEM2-Amino-4-hydroxypteridine/Creatinine, BloodSRto

Frequently asked questions

Code details

Code80167-0

SystemLOINC

Display name2-Amino-4-hydroxypteridine/Creatinine [Molar ratio]

Description2-Amino-4-hydroxypteridine/Creatinine

Short name2-Amino-4OH-pteridine/Creat SerPl-sRto

Component2-Amino-4-hydroxypteridine/Creatinine

PropertySRto

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHEM

Example unitsnmol/mmol creatinine

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.54

Last changed2.54

Consumer names

2-Amino-4-hydroxypteridine/Creatinine, Blood

Part names

2-Amino-4-hydroxypteridine/CreatinineSRtoPtSer/PlasQnSubstance RatioPoint in time (spot)Serum or Plasma

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.