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Protein and Immunoglobulin, Serum or Urine — Qualitative (Method Unspecified)

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

A qualitative assessment of protein and immunoglobulin in serum or urine. The abbreviated code is not fully standard, so the exact method cannot be confirmed.

Quick summary

["This test evaluates the presence and pattern of protein and immunoglobulin in a serum or urine sample."]

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

Key facts at a glance

LOINC
19751-7
Short code
Mouse Epith+Ser+Ur Prot IgE Qn
Synonyms
Mouse Epith+Ser+Ur Prot IgE Qn
Category
urine
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
86592
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 is this test?

This abbreviated laboratory code appears to represent a qualitative test for protein and immunoglobulin using either serum, the liquid part of blood after clotting, or urine. Some parts of the code are not standard enough to confirm a specific testing method.

Why might I need this test?

Clinicians may use this type of testing to investigate unusual protein or immunoglobulin findings, including possible monoclonal proteins. The reason for testing and the most useful specimen depend on the clinical situation.

How is the test performed?

A laboratory analyzes a serum or urine sample and reports whether protein or immunoglobulin is detected and, when applicable, describes its pattern. The laboratory's report provides the definitive test name and method.

How do I prepare for the test?

Follow the instructions provided by your clinician or laboratory. If urine is required, ask whether a first-morning, random, or timed collection is preferred; if serum is required, fasting may or may not be requested.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Detectable protein or immunoglobulin in urine may reflect temporary or ongoing processes involving the kidneys or urinary tract. A distinct or monoclonal pattern in serum or urine can sometimes be associated with immune-cell or plasma-cell disorders, but it does not establish a diagnosis by itself. Results should be interpreted with symptoms, other laboratory findings, and confirmatory testing when appropriate.

Short name

Protein/Ig, Serum or Urine

Frequently asked questions

Is this the same as a routine urinalysis?
Not necessarily. A routine urinalysis commonly includes a protein screening dipstick, while this code appears to refer to a more specific qualitative protein and immunoglobulin assessment. The laboratory report can clarify the distinction.
Do I need to fast for this test?
Fasting depends on the exact method and the reason for testing. Because the abbreviated code does not clearly identify a standard preparation protocol, follow the clinician's or laboratory's instructions.
Does a positive result mean I have cancer?
No. A positive or abnormal result is nonspecific and may have many causes. Additional testing and clinical evaluation are usually needed before any diagnosis can be made.
  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