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Fibrinogen (Serum) Concentration

Published: August 9, 2026Updated: August 17, 2026

This test measures the amount of fibrinogen, a protein in your blood that plays a key role in blood clotting.

Quick summary

["Fibrinogen helps your blood clot properly and supports wound healing."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
11902-4
Short code
GA from BPD.Hadlock84
Synonyms
GA from BPD.Hadlock84
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
22
Ref high
198
Critical range
— – 10000 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
us-estimated-from-bpd-hadlock
CPT
82553
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Might Be Ordered

Your healthcare provider may order this test to check for bleeding disorders, clotting problems, or to monitor conditions like liver disease, which can affect fibrinogen levels. It may also be used before surgeries or procedures that require careful blood clotting control.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm to draw blood. If you’re on blood-thinning medication, let your provider know before the test.

What the Results Mean

Results help determine if your blood clotting is functioning as expected. Very low or very high levels might indicate underlying health concerns that need further evaluation.

Common Conditions Monitored

Fibrinogen levels are often checked in people with conditions like liver disease, kidney disease, or those taking anticoagulants (blood thinners). It can also be useful in diagnosing or managing bleeding disorders.

Reference range

Adult males: 22-198 U/L; Females: 22-198 U/LN/A

Specimen: serum

No special preparation required. Inform provider of any chest pain or symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Serum Fibrinogen

Frequently asked questions

What causes abnormal fibrinogen levels?
Fibrinogen levels can be affected by liver disease, infections, inflammation, or certain medications. If you have a history of bleeding or clotting issues, your provider may also consider genetic factors.
How long does it take to get results?
Results are typically available within 1 to 3 business days, depending on your lab’s processing time.
Can I eat or drink before this test?
You can eat and drink normally before this test, as no fasting is required.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 17, 2026. · Read our editorial policy