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LOINC Code 5913-9: Hemoglobin F (Amn fld) [Mass fraction]

5913-9 is a LOINC code used to identify Hemoglobin F (Amn fld) [Mass fraction] 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 Hemoglobin F/Hemoglobin.total. It is commonly used with the system or sample type Amnio fld.

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 Hemoglobin F/Hemoglobin.total. It is commonly used with the system or sample type Amnio fld.

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

  • Hemoglobin F/Hemoglobin.total in Amniotic fluid
  • Hemoglobin F/Hemoglobin.total
  • Used to determine if amniotic fluid bleeding is maternal or fetal in origin
  • AF; Amn; Amn fl; Amnio; Amniotic flu; Amniotic fluid; Fetal hemoglobin; Haemoglobin; Hb; HbF; HEMATOLOGY/CELL COUNTS; Hgb; Hgb F; Mass Fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Tot; Totl

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

Hemoglobin F (Amn fld) [Mass fraction]Hemoglobin F/Hemoglobin.total in Amniotic fluidHgb F MFr AmnHemoglobin F/Hemoglobin.totalHEM/BCHemoglobin F/Total Hgb, Amniotic fluidMFr

Frequently asked questions

Code details

Code5913-9
SystemLOINC
Display nameHemoglobin F (Amn fld) [Mass fraction]
DescriptionHemoglobin F/Hemoglobin.total
Short nameHgb F MFr Amn
ComponentHemoglobin F/Hemoglobin.total
PropertyMFr
TimingPt
System (specimen)Amnio fld
ScaleQn
ClassHEM/BC
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

Hemoglobin F/Total Hgb, Amniotic fluid

Part names

Hemoglobin F/Hemoglobin.totalMFrPtAmnio fldQnMass fractionPoint in time (spot)Amniotic fluid

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.