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Serum Creatinine Phosphokinase (CPK) Subtype Analysis (Bromocresol Green Method)

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

This test measures different types of Creatine Phosphokinase (CPK), an enzyme found in heart, muscle, and brain cells. It helps identify which tissues may be damaged or stressed.

Quick summary

["CPK subtypes can pinpoint whether heart, muscle, or other tissues are affected by injury or illness."]

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

Key facts at a glance

LOINC
86183-1
Short code
S pneum Da 9N Ab sp2 Ser-aCnc
Synonyms
S pneum Da 9N Ab sp2 Ser-aCnc
Category
coagulation
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 Is Done

Your doctor may order this test if you have symptoms like chest pain, muscle weakness, or unexplained fatigue. It’s also used to check for conditions like heart attacks, muscle injuries, or nerve disorders. Sometimes, it’s part of routine monitoring for people with known heart or muscle problems.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample drawn from a vein in your arm. If you’re on certain medications or have recent muscle trauma, let your doctor know beforehand.

What the Results Mean

Higher levels of certain CPK subtypes may suggest damage to specific tissues. For example, elevated CPK-MB is often linked to heart muscle injury, while higher total CPK may indicate muscle strain or other conditions.

Common Conditions Linked to Abnormal Results

Abnormal CPK levels can signal heart attacks, muscle injuries (like from exercise or trauma), nerve disorders, or metabolic conditions. High levels of specific subtypes help doctors narrow down the cause.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

CPK Isoenzyme Profile

Frequently asked questions

Will my CPK test results affect my medications?
Your doctor will review your results with your full medical history and other test results. Some medications (like statins or certain pain relievers) may influence CPK levels, so discuss any concerns with your provider.
Can I still exercise if my CPK levels are high?
If your CPK levels are elevated due to muscle strain or exertion, rest and avoid overexertion until cleared by your doctor. If it’s linked to a heart issue, follow your doctor’s advice on activity levels.
How often should I get this test?
Your doctor will determine how often you need this test based on your health condition. For example, people with heart disease may get it more frequently than others. Follow their guidance.
  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