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Peptide fragment analysis of prohormone P6 (e.g., proinsulin or related peptide fragments)

Published: August 9, 2026Updated: August 16, 2026

This test measures specific small peptide fragments derived from a larger protein (prohormone P6), which may include proinsulin or similar molecules. It helps assess metabolic or endocrine function.

Quick summary

["This test may help evaluate conditions affecting hormone processing or diabetes-related metabolism."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
13036-9
Short code
C peptide sp6 p chal SerPl-mCnc
Synonyms
C peptide sp6 p chal SerPl-mCnc
Category
coagulation
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
0.8
Ref high
1.2
Critical range
— – 5 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
85610
SNOMED
396252006
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

What This Test Measures

The test detects small peptide fragments (e.g., proinsulin breakdown products) in your blood. These fragments are part of larger proteins that your body naturally produces and processes. The method used is likely a sensitive immunoassay or similar technique to identify these peptides at low concentrations.

Why It Might Be Ordered

Your healthcare provider may order this test if you have symptoms or conditions linked to abnormal hormone processing, such as diabetes, pancreatic issues, or metabolic disorders. It could also be used in research or specialized clinical scenarios.

How the Test Works

Blood is drawn and analyzed to detect specific peptide fragments. The test identifies these fragments based on their unique molecular structure, often using highly specific immunoassay techniques to ensure accuracy.

Common Reasons for Testing

This test may be recommended if you have unexplained metabolic symptoms, suspected endocrine disorders, or if monitoring a condition related to hormone metabolism.

Reference range

INR: 0.8-1.2 (warfarin: 2.0-3.0)N/A

Specimen: serum

Inform your healthcare provider if you are taking blood thinners. No special preparation required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

P6 Peptide Profile

Frequently asked questions

How does this test differ from standard glucose or insulin tests?
Unlike standard glucose or insulin tests, this test focuses on specific peptide fragments of prohormones, which can provide additional insights into how your body processes these proteins. For example, abnormal levels might suggest issues with proinsulin conversion or other metabolic pathways.
What might abnormal results indicate?
Abnormal results could signal problems with hormone production, processing, or secretion. This might include conditions like diabetes (if related to proinsulin), pancreatic disorders, or other metabolic or endocrine imbalances. Always discuss results with your healthcare provider.
Do I need to prepare for this test?
No special preparation is typically required, but you may be asked to fast for a certain period if the test involves blood sampling for metabolic monitoring. Follow your provider’s instructions.
  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 16, 2026. · Read our editorial policy