Hemoglobin

ChemistryAlso known as: HbAlso known as: Hemoglobin, totalg/dL

Measures the amount of oxygen-carrying hemoglobin protein in your blood.

Normal Range
14.175 – 17.1
g/dL
Abnormal Levels
< 13.2 g/dL
> 17.1 g/dL
Specimen Type
Blood

Why This Biomarker Matters

Hemoglobin is essential for oxygen delivery. Low levels cause fatigue and weakness; high levels increase clot risk. This fundamental test screens for anemia and various blood disorders.

Optimal Ranges

Clinician-defined 4-point reference thresholds (g/dL)

Default Range

13.2
14.175
16.125
17.1
Low
13.2 g/dL
Borderline Low
14.175 g/dL
Optimal
16.125 g/dL
Borderline High
17.1 g/dL

Overview

Hemoglobin is the iron-containing protein in red blood cells that carries oxygen throughout your body. A hemoglobin test measures the total amount of hemoglobin in blood, revealing whether you have anemia (too little) or polycythemia (too much). Low hemoglobin causes fatigue, shortness of breath, and weakness, while high levels can increase clot risk. This is one of the most common tests in clinical medicine and a core part of the complete blood count.

Related Health Conditions

Conditions where Hemoglobin is commonly tested

Anemia

Chronic obstructive lung disease

Fatigue

Iceland disease

Iron deficiency anemia

Obstructive sleep apnea syndrome

Primary malignant neoplasm of colon

Thrombocytopenic disorder

Related Health Goals

Improve Energy Levels

Optimize Iron and Blood Health

Optimize Nutrient Levels

Optimize Sleep Quality

Screen for Cancer Risk

Support Respiratory Health

Treatments & Interventions

Therapies monitored using Hemoglobin

Iron pentacarbonyl

Iron

Caffeine citrate

Iron carbonyl

Hematite

Quercetin

Iron oxide

Prednisolone acetate

Prednisolone sodium phosphate

Prednisolone tertiary butylacetate

Venlafaxine hydrochloride

Interferon alfacon-1

Nandrolone phenpropionate

Sodium ferric gluconate complex

Argatroban

Clinical Trials

79
Total Trials
20
Recruiting
22
With Results

Recent Trials

Cognitive Performance, Sleep Disturbances and Fatigue in Multiple Sclerosis

NCT07426991Recruiting837 enrolled

Patient-Centered Assessment of Symptoms and Outcomes

NCT03952624Recruiting692 enrolled

Wellness App for Sleep Disturbance in Hematological Cancer Patients

NCT05294991N/ARecruiting276 enrolled

ListenFuture-Listening for Their Future: Deaf and Hard-of-Hearing Adolescents

NCT07416292Recruiting256 enrolled

NE3107 in Adults With Neurological Symptoms of Long COVID

NCT06847191Phase 2Recruiting208 enrolled
View all 79 trials on ClinicalTrials.gov

Technical Information (LOINC Codes)

Standardized laboratory codes for this biomarker

718-7Primary
Hemoglobin [Mass/volume] in Blood
g/dL
48035-0
Hemoglobin [Presence] in Cerebral spinal fluid
717-9
Hemoglobin [Presence] in Blood
40719-7
Hemoglobin [Mass/volume] in Cord blood
g/dL
47278-7
MCH [Entitic mass] in Cord blood
pg
30354-5
Hemoglobin [Mass/volume] in Arterial cord blood
g/dL
76769-9
Hemoglobin [Mass/volume] in Venous blood by Oximetry
g/L
76768-1
Hemoglobin [Mass/volume] in Mixed venous blood by Oximetry
g/L
33517-4
Hemoglobin [Presence] in Body fluid
726-0
Hemoglobin [Mass/volume] in Urine
mg/dL
59260-0
Hemoglobin [Moles/volume] in Blood
mmol/L
55782-7
Hemoglobin [Mass/volume] in Blood by Oximetry
g/dL
49137-3
Hemoglobin [Mass/volume] in Urine by Test strip
mg/L
71694-4
Hemoglobin [Entitic mass] in Reticulocytes by Automated count
pg
30351-1
Hemoglobin [Mass/volume] in Mixed venous blood
g/dL
59467-1
MCHC [Entitic Moles/volume] in Red Blood Cells
mmol/L
30352-9
Hemoglobin [Mass/volume] in Capillary blood
g/dL
725-2
Hemoglobin [Presence] in Urine
42810-2
Hemoglobin [Entitic mass] in Reticulocytes
pg
50559-4
Hemoglobin [Mass/volume] in Urine by Automated test strip
mg/L
33509-1
Hemoglobin [Mass/volume] in Body fluid
g/dL
14775-1
Hemoglobin [Mass/volume] in Arterial blood by Oximetry
g/dL
30313-1
Hemoglobin [Mass/volume] in Arterial blood
g/dL
57751-0
Hemoglobin [Presence] in Urine by Automated test strip
30350-3
Hemoglobin [Mass/volume] in Venous blood
g/dL
20509-6
Hemoglobin [Mass/volume] in Blood by calculation
g/dL
28540-3
MCHC [Entitic Mass/volume] in Red Blood Cells
g/dL
28539-5
MCH [Entitic mass]
pg
5794-3
Hemoglobin [Presence] in Urine by Test strip
30353-7
Hemoglobin [Mass/volume] in Venous cord blood
g/dL
785-6
MCH [Entitic mass] by Automated count
pg
786-4
MCHC [Entitic Mass/volume] in Red Blood Cells by Automated count
g/dL
97556-5
Hemoglobin [Mass/volume] in Capillary blood by Oximetry
g/L
105040-0
Hemoglobin [Mass/volume] in Mixed venous blood by calculation
g/dL
105274-5
Hemoglobin [Mass/volume] in Venous blood by calculation
g/dL
105300-8
Hemoglobin [Moles/volume] in Mixed venous blood
mmol/L
33025-8
Hemoglobin [Mass/volume] in Venous cord blood by calculation
g/dL
33026-6
Hemoglobin [Mass/volume] in Arterial cord blood by calculation
g/dL
34618-9
Hemoglobin [Presence] in Specimen
47279-5
MCHC [Entitic Mass/volume] in Red Blood Cells from Cord blood
g/L
54289-4
Hemoglobin [Mass/volume] in Blood from Blood product unit
g/dL
59468-9
MCH [Entitic substance]
fmol
61180-6
Hemoglobin [Mass/volume] in Blood from Fetus
g/dL
62243-1
MCH [Entitic mass] in Fetus by Automated count
pg
62246-4
MCHC [Entitic Mass/volume] in Red Blood Cells from Fetus by Automated count
g/L
69950-4
Hemoglobin [Mass/volume] in Pericardial fluid
g/L
719-5
Hemoglobin [Mass/volume] in Cerebral spinal fluid
g/dL
722-9
Hemoglobin [Mass/volume] in Pleural fluid
g/dL
723-7
Hemoglobin [Mass/volume] in Peritoneal fluid
g/dL
724-5
Hemoglobin [Mass/volume] in Synovial fluid
g/dL
73895-5
Hemoglobin [Entitic substance] in Reticulocytes by Automated count
fmol
75928-2
Hemoglobin [Moles/volume] in Arterial blood
mmol/L
93846-4
Hemoglobin [Moles/volume] in Venous blood
mmol/L
97550-8
Hemoglobin [Mass/volume] in Central venous blood by calculation
g/L
97555-7
Hemoglobin [Mass/volume] in Central venous blood by Oximetry
g/L
103750-6
Hemoglobin [Moles/volume] in Venous cord blood

Available Lab Tests

Order tests that measure this biomarker

Advanced Cardiovascular Health Basic

$132.55

Advanced Cardiovascular Health Comprehensive

$526.57

Advanced Liver Health Basic

$293.92

Advanced Liver Health Comprehensive

$1044.34

Complete Blood Count (CBC) with Differential and Platelets Blood Test

$15.79
Results in Same day to 1 business day

Sickle Cell Trait Screen Test with Reflex

$105.82

Find Specialists

Doctors who commonly order this test

Family Medicine
Internal Medicine
Gastroenterology
Hematology
Infectious Disease
Pulmonary Disease
Medical Oncology
Neurology
Sleep Medicine