Comprehensive Metabolic Panel (CMP) Without eGFR
It measures liver function, electrolytes, kidney-related markers, blood sugar, and proteins in one draw—order through Vitals Vault and test at Quest.
This panel bundles multiple biomarker tests in one order—your report explains how results fit together.
A Comprehensive Metabolic Panel (CMP) is a common blood test that gives you a broad snapshot of hydration and electrolytes, blood sugar, liver function, and several kidney-related markers. It is often used as a baseline checkup test and as a way to follow known conditions over time.
This version is labeled “without eGFR,” which means the report does not include an estimated glomerular filtration rate (eGFR). eGFR is a calculated estimate of kidney filtration that is usually derived from creatinine plus age and sex (and sometimes other factors). You can still learn a lot from the CMP without it, especially when you interpret creatinine and BUN in context.
Because the CMP covers multiple body systems, a single out-of-range value does not automatically mean something is wrong. Your result is most useful when you compare it to your symptoms, medications, recent illness, and prior labs, ideally with a clinician’s guidance.
Do I need a Comprehensive Metabolic Panel Without Glomerular Filtration Rate Estimated eGFR test?
You might consider this panel if you want a broad, practical look at several core health areas in one blood draw. It is commonly used for routine health screening, before starting or adjusting certain medications, or when you and your clinician are trying to explain nonspecific symptoms like fatigue, nausea, poor appetite, muscle cramps, swelling, or changes in urination.
This panel is also useful if you are monitoring a known issue such as high blood pressure, diabetes risk, liver disease, or a history of abnormal electrolytes. It can help show patterns over time, such as whether your sodium and potassium stay stable, whether your glucose trends upward, or whether liver enzymes are improving.
If your main goal is a kidney filtration estimate, you may want a CMP that includes eGFR or a dedicated kidney evaluation. A CMP without eGFR can still flag kidney-related concerns through creatinine and BUN, but it does not provide the calculated filtration estimate.
Lab testing supports clinician-directed care and shared decision-making. It cannot diagnose you on its own, and follow-up testing is sometimes needed to confirm a finding or identify the cause.
This panel is performed in CLIA-certified laboratories; results should be interpreted with your clinical history and are not a standalone diagnosis.
Lab testing
Order a CMP without eGFR and schedule your draw when it works for you.
Schedule online, results typically within about a week
Clear reporting and optional clinician context
HSA/FSA eligible where applicable
Get this test with Vitals Vault
Vitals Vault lets you order a CMP without eGFR directly, then complete your blood draw at a participating Quest location. It is a straightforward way to get baseline labs or recheck a prior abnormal result without waiting for an office visit just to place the order.
Once your results are back, you can use PocketMD to walk through what each section of your panel means, what “low” or “high” often points to, and which follow-up labs are commonly paired with a CMP (for example, A1c for longer-term glucose, or a urine albumin-to-creatinine ratio for kidney risk).
If you are tracking a condition or a medication change, Vitals Vault makes it easier to retest on a schedule you and your clinician agree on, so you can focus on trends rather than one isolated number.
- Order online and draw at Quest locations
- Clear, plain-language guidance in PocketMD
- Designed for trending results over time
Key benefits of Comprehensive Metabolic Panel (CMP) testing
- Checks electrolytes (sodium, potassium, chloride, CO2) that affect hydration, nerves, and muscle function.
- Screens blood sugar (glucose) to help spot hyperglycemia or hypoglycemia patterns.
- Assesses liver-related enzymes and bilirubin to flag possible liver or bile-duct stress.
- Includes albumin and total protein, which can reflect nutrition status, inflammation, or liver/kidney issues.
- Provides kidney-related markers (BUN and creatinine) even when eGFR is not reported.
- Helps you and your clinician interpret symptoms like cramps, weakness, nausea, or swelling with objective data.
- Creates a repeatable baseline so you can track changes after lifestyle shifts, illness recovery, or medication adjustments.
What is a Comprehensive Metabolic Panel (CMP) without eGFR?
A Comprehensive Metabolic Panel is a group of blood tests run together on a single sample. Instead of measuring one biomarker, it measures a set of related markers that reflect how your body is balancing fluids and electrolytes, processing sugar, producing proteins, and handling waste products.
“Without eGFR” means the lab report does not include the estimated glomerular filtration rate, which is a calculated value used to estimate kidney filtration. Many labs calculate eGFR automatically from creatinine plus demographic inputs. If eGFR is not included, you can still interpret creatinine and BUN, but your clinician may recommend adding eGFR or other kidney tests if kidney function is the main question.
What body systems does the CMP cover?
Your CMP spans several systems at once. Electrolytes and CO2 relate to hydration and acid-base balance. Glucose relates to energy metabolism and diabetes risk. Liver enzymes and bilirubin relate to liver cell health and bile flow. Albumin and total protein relate to protein production and fluid balance. BUN and creatinine relate to kidney handling of nitrogen waste and muscle-related creatinine production.
Why eGFR matters (and why it may be missing)
eGFR is widely used to stage chronic kidney disease and to guide medication dosing. Some orders omit it because of ordering conventions, lab configuration, or because the clinician wants the raw markers without a calculated estimate. If you have known kidney disease, diabetes, high blood pressure, or you take medications that require kidney-based dosing, ask whether you should add eGFR and urine testing.
What do my CMP without eGFR results mean?
Low results on a CMP
A “low” flag depends on the specific marker. Low sodium can happen with overhydration, certain medications (like some diuretics or antidepressants), or hormonal causes, and it can contribute to headaches or confusion when severe. Low potassium may occur with vomiting/diarrhea, diuretics, or inadequate intake, and it can cause weakness or palpitations. Low albumin or total protein can reflect reduced production (often liver-related), protein loss (sometimes kidney or gut-related), or inflammation, and it can contribute to swelling.
In-range (optimal) CMP results
When most values are in range, it suggests your electrolyte balance, glucose at the time of the draw, and liver-related enzymes are not showing obvious stress. Normal BUN and creatinine are reassuring, although they do not fully rule out early kidney disease without eGFR and urine markers. “Optimal” also means stable for you over time, so comparing to prior results can be as important as the single reference range.
High results on a CMP
High glucose can be a temporary response to stress, illness, or recent eating, but repeated elevations often prompt follow-up with fasting glucose or hemoglobin A1c. Elevated ALT or AST can occur with fatty liver, alcohol use, viral illness, medication effects, or muscle injury, and the pattern across liver markers helps narrow the cause. High bilirubin may relate to bile flow issues or benign conditions like Gilbert syndrome, depending on the fraction and clinical context. Higher BUN and/or creatinine can be seen with dehydration, high protein intake, certain medications, or reduced kidney function, and they often need repeat testing and additional kidney evaluation.
Factors that influence CMP values
Hydration status is one of the biggest drivers of short-term changes, especially for sodium, BUN, and creatinine. Recent meals can affect glucose, and heavy exercise can transiently raise AST (and sometimes creatinine) because muscle is involved. Medications and supplements matter: diuretics, ACE inhibitors/ARBs, NSAIDs, lithium, and some antibiotics can shift electrolytes or kidney-related markers, while acetaminophen and other drugs can affect liver enzymes. Acute illness, vomiting/diarrhea, and alcohol intake in the days before your draw can also change results, so it helps to note timing when you review your panel.
What’s included
- Albumin
- Albumin/Globulin Ratio
- Alkaline Phosphatase
- Alt
- Ast
- Bilirubin, Total
- Bun/Creatinine Ratio
- Calcium
- Carbon Dioxide
- Chloride
- Creatinine
- Globulin
- Glucose
- Potassium
- Protein, Total
- Sodium
- Urea Nitrogen (Bun)
Frequently Asked Questions
What is the difference between a CMP with eGFR and without eGFR?
The underlying CMP markers are the same, but the “with eGFR” version includes a calculated estimate of kidney filtration (eGFR) derived from creatinine plus demographic inputs. The “without eGFR” version reports creatinine (and BUN) but does not provide the calculated filtration estimate. If kidney staging or medication dosing is a concern, ask about adding eGFR and urine testing.
Do I need to fast for a CMP?
Fasting is not always required, but it can make glucose easier to interpret. If your clinician wants a fasting glucose, avoid calories for about 8–12 hours before the draw and drink water as usual. If you did not fast, your glucose may still be useful, but follow-up with fasting glucose or A1c may be recommended if it is elevated.
How often should I repeat a CMP?
It depends on why you are testing. For routine screening, many people repeat annually or as advised by their clinician. If you are starting or adjusting medications that affect kidneys, electrolytes, or liver (such as diuretics or certain blood pressure medicines), repeat testing may be done within weeks to months. If you had an abnormal result, a short-interval recheck is often used to confirm whether it was temporary.
Can dehydration change my CMP results?
Yes. Dehydration can concentrate your blood and commonly raises BUN (and sometimes creatinine) while also affecting sodium and other electrolytes. If your results suggest dehydration and you were not feeling well or had limited fluid intake, your clinician may recommend rechecking after you are well-hydrated.
What does high ALT or AST mean on a CMP?
ALT and AST are enzymes that can rise when liver cells are irritated or injured, but they can also rise from muscle injury or heavy exercise (especially AST). The degree of elevation, the ratio between enzymes, and other CMP markers like bilirubin and ALP help interpret the pattern. Persistent elevation usually leads to a focused workup that may include hepatitis testing, imaging, and a review of alcohol and medication use.
If my creatinine is normal, does that mean my kidneys are fine?
A normal creatinine is reassuring, but it is not the whole story. Creatinine is influenced by muscle mass, age, hydration, and medications, and early kidney disease can be missed without a calculated eGFR and urine markers. If you have risk factors like diabetes, high blood pressure, or a family history of kidney disease, ask about eGFR and a urine albumin-to-creatinine ratio.