If you have more than one test - add them one by one.
20 laboratory tests found
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$58.68
$19.00Covered tests: Vitamin B12 and Folates (LabCorp)Covered components: Vitamin B12, Folate (Folic Acid), Serum$39.68$58.68
Order from LabReqs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Albumin $19.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $19.00Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 and Folate Blood Test $39.68)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $39.68 -
$69.67
Covered tests: Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Extra tests (click to add to search): Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Covered components: AlbuminExtra components (click to add to search): eGFR If NonAfricn Am, eGFR If Africn Am, Glucose, BUN, Creatinine, BUN/Creatinine Ratio, Sodium, Potassium, Chloride, andBlacklisted States: NY, NJ, RI$29.99Covered tests: Vitamin B12 and Folates (LabCorp)Covered components: Vitamin B12, Folate (Folic Acid), Serum$39.68$69.67
Order from LabReqs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (CMP- Comprehensive Metabolic Panel $29.99)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $29.99Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 and Folate Blood Test $39.68)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $39.68 -
$70.68
Covered tests: Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Extra tests (click to add to search): Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Covered components: AlbuminExtra components (click to add to search): eGFR If NonAfricn Am, eGFR If Africn Am, Glucose, BUN, Creatinine, BUN/Creatinine Ratio, Sodium, Potassium, Chloride, andBlacklisted States: NJ, RI, NY$31.00Covered tests: Vitamin B12 and Folates (LabCorp)Covered components: Vitamin B12, Folate (Folic Acid), Serum$39.68$70.68
Order from Personalabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Comprehensive Metabolic Panel (CMP 14) Blood Test $31.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $31.00Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 and Folate Blood Test $39.68)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $39.68 -
$72.68
Covered tests: Renal Function Panel (partial) (LabCorp)
Extra tests (click to add to search): Renal Function Panel (partial) (LabCorp)
Covered components: AlbuminExtra components (click to add to search): eGFR If NonAfricn Am, eGFR If Africn Am, Glucose, BUN, Creatinine, BUN/Creatinine Ratio, Sodium, Potassium, Chloride, andBlacklisted States: NY, NJ, RI$33.00Covered tests: Vitamin B12 and Folates (LabCorp)Covered components: Vitamin B12, Folate (Folic Acid), Serum$39.68$72.68
Order from Walk-In Lab
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Renal Function Blood Test Panel $33.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $33.00Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 and Folate Blood Test $39.68)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $39.68 -
$72.68
Covered tests: Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Extra tests (click to add to search): Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Covered components: AlbuminExtra components (click to add to search): eGFR If NonAfricn Am, eGFR If Africn Am, Glucose, BUN, Creatinine, BUN/Creatinine Ratio, Sodium, Potassium, Chloride, andBlacklisted States: NY, NJ, RI$33.00Covered tests: Vitamin B12 and Folates (LabCorp)Covered components: Vitamin B12, Folate (Folic Acid), Serum$39.68$72.68
Order from Walk-In Lab
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Comprehensive Metabolic Panel (CMP-14) with eGFR Blood Test $33.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $33.00Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 and Folate Blood Test $39.68)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $39.68 -
$73.68
Covered tests: Renal Function Panel (partial) (LabCorp)
Extra tests (click to add to search): Renal Function Panel (partial) (LabCorp)
Covered components: AlbuminExtra components (click to add to search): eGFR If NonAfricn Am, eGFR If Africn Am, Glucose, BUN, Creatinine, BUN/Creatinine Ratio, Sodium, Potassium, Chloride, andBlacklisted States: NY, NJ, RI$34.00Covered tests: Vitamin B12 and Folates (LabCorp)Covered components: Vitamin B12, Folate (Folic Acid), Serum$39.68$73.68
Order from RequestATest
Step 1: Add to cart - for each panel below click "Add to Cart" button and then close the new tab.
- Click Add to Cart then close the new tab (Renal (Kidney) Function Panel $34.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $34.00Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 and Folate Blood Test $39.68)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $39.68 -
$73.68
$34.00Covered tests: Vitamin B12 and Folates (LabCorp)Covered components: Vitamin B12, Folate (Folic Acid), Serum$39.68$73.68
Order from RequestATest
Step 1: Add to cart - for each panel below click "Add to Cart" button and then close the new tab.
- Click Add to Cart then close the new tab (Albumin Blood Test $34.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $34.00Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 and Folate Blood Test $39.68)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $39.68 -
$73.68
$34.00Covered tests: Vitamin B12 and Folates (LabCorp)Covered components: Vitamin B12, Folate (Folic Acid), Serum$39.68$73.68
Order from Walk-In Lab
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Albumin Serum Test $34.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $34.00Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 and Folate Blood Test $39.68)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $39.68 -
$73.68
Covered tests: Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Extra tests (click to add to search): Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Covered components: AlbuminExtra components (click to add to search): eGFR If NonAfricn Am, eGFR If Africn Am, Glucose, BUN, Creatinine, BUN/Creatinine Ratio, Sodium, Potassium, Chloride, andBlacklisted States: NY, NJ, RI$34.00Covered tests: Vitamin B12 and Folates (LabCorp)Covered components: Vitamin B12, Folate (Folic Acid), Serum$39.68$73.68
Order from RequestATest
Step 1: Add to cart - for each panel below click "Add to Cart" button and then close the new tab.
- Click Add to Cart then close the new tab (Comprehensive Metabolic Panel Blood Test $34.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $34.00Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 and Folate Blood Test $39.68)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $39.68 -
$74.68
Covered tests: Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Extra tests (click to add to search): Complete Blood Count (CBC) With Differential (LabCorp) , Lipid Panel With Total Cholesterol:HDL Ratio (LabCorp) , Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Covered components: AlbuminExtra components (click to add to search): WBC, RBC, Hemoglobin, Hematocrit, MCV, MCH, MCHC, RDW, Platelets, and$35.00Covered tests: Vitamin B12 and Folates (LabCorp)Covered components: Vitamin B12, Folate (Folic Acid), Serum$39.68$74.68
Order from LifeExtension
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Complete Blood Count (CBC) / Chemistry / Lipids Panel Blood Test $35.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 and Folate Blood Test $39.68)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $74.68 -
$97.23
Covered tests: Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Extra tests (click to add to search): Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Covered components: AlbuminExtra components (click to add to search): eGFR If NonAfricn Am, eGFR If Africn Am, Glucose, BUN, Creatinine, BUN/Creatinine Ratio, Sodium, Potassium, Chloride, andBlacklisted States: NJ, RI, NY$29.73Covered tests: Vitamin B12 and Folates (LabCorp)Covered components: Vitamin B12, Folate (Folic Acid), SerumBlacklisted States: MD, NJ, NY, RI$59.00Health Tests DirectRequisition Charge (per order charge)$8.50$97.23
Order from Health Tests Direct
Step 1: Add to cart - for each panel below click "Add to Cart" button and then close the new tab.
- Click Add to Cart then close the new tab (Comprehensive Metabolic Panel $29.73)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $38.23 ( $29.73 panels price + $8.50 requisition charge)Order from HealthLabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 & Folic Acid Test $59.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $59.00 -
$98.00
Covered tests: Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Extra tests (click to add to search): Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Covered components: AlbuminExtra components (click to add to search): eGFR If NonAfricn Am, eGFR If Africn Am, Glucose, BUN, Creatinine, BUN/Creatinine Ratio, Sodium, Potassium, Chloride, andBlacklisted States: MD, NJ, NY, RI$39.00Covered tests: Vitamin B12 and Folates (LabCorp)Covered components: Vitamin B12, Folate (Folic Acid), SerumBlacklisted States: MD, NJ, NY, RI$59.00$98.00
Order from HealthLabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Comprehensive Metabolic Panel (CMP) $39.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 & Folic Acid Test $59.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $98.00 -
$99.39
Covered tests: Renal Function Panel (partial) (LabCorp)
Extra tests (click to add to search): Renal Function Panel (partial) (LabCorp)
Covered components: AlbuminExtra components (click to add to search): eGFR If NonAfricn Am, eGFR If Africn Am, Glucose, BUN, Creatinine, BUN/Creatinine Ratio, Sodium, Potassium, Chloride, andBlacklisted States: NJ, RI, NY$31.89Covered tests: Vitamin B12 and Folates (LabCorp)Covered components: Vitamin B12, Folate (Folic Acid), SerumBlacklisted States: MD, NJ, NY, RI$59.00Health Tests DirectRequisition Charge (per order charge)$8.50$99.39
Order from Health Tests Direct
Step 1: Add to cart - for each panel below click "Add to Cart" button and then close the new tab.
- Click Add to Cart then close the new tab (Renal Function Panel $31.89)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $40.39 ( $31.89 panels price + $8.50 requisition charge)Order from HealthLabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 & Folic Acid Test $59.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $59.00 -
$102.20
Covered tests: Vitamin B12 and Folates (LabCorp)Covered components: Vitamin B12, Folate (Folic Acid), SerumBlacklisted States: MD, NJ, NY, RI$59.00$102.20
Order from HealthLabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 & Folic Acid Test $59.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $59.00Order from EconoLabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Albumin, Serum $43.20)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $43.20 -
$102.23
Covered tests: Folate (Folic Acid) (LabCorp)Covered components: Folate (Folic Acid), SerumBlacklisted States: MD, NJ, NY, RI$29.00Covered tests: Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Extra tests (click to add to search): Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Covered components: AlbuminExtra components (click to add to search): eGFR If NonAfricn Am, eGFR If Africn Am, Glucose, BUN, Creatinine, BUN/Creatinine Ratio, Sodium, Potassium, Chloride, andBlacklisted States: NJ, RI, NY$29.73Covered tests: Vitamin B12 (LabCorp)Covered components: Vitamin B12Blacklisted States: MD, NJ, NY, RI$35.00Health Tests DirectRequisition Charge (per order charge)$8.50$102.23
Order from Health Tests Direct
Step 1: Add to cart - for each panel below click "Add to Cart" button and then close the new tab.
- Click Add to Cart then close the new tab (Comprehensive Metabolic Panel $29.73)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $38.23 ( $29.73 panels price + $8.50 requisition charge)Order from HealthLabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Folic Acid (Folate) Test $29.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 Test $35.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $64.00 -
$103.00
Covered tests: Folate (Folic Acid) (LabCorp)Covered components: Folate (Folic Acid), SerumBlacklisted States: MD, NJ, NY, RI$29.00Covered tests: Vitamin B12 (LabCorp)Covered components: Vitamin B12Blacklisted States: MD, NJ, NY, RI$35.00Covered tests: Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Extra tests (click to add to search): Metabolic Panel (14), Comprehensive (partial) (LabCorp)
Covered components: AlbuminExtra components (click to add to search): eGFR If NonAfricn Am, eGFR If Africn Am, Glucose, BUN, Creatinine, BUN/Creatinine Ratio, Sodium, Potassium, Chloride, andBlacklisted States: MD, NJ, NY, RI$39.00$103.00
Order from HealthLabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Folic Acid (Folate) Test $29.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 Test $35.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Comprehensive Metabolic Panel (CMP) $39.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $103.00 -
$103.99
Covered tests: Vitamin B12 and Folates (LabCorp)Covered components: Vitamin B12, Folate (Folic Acid), SerumBlacklisted States: MD, NJ, NY, RI$59.00$103.99
Order from Private MD
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Albumin $44.99)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $44.99Order from HealthLabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 & Folic Acid Test $59.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $59.00 -
$104.39
Covered tests: Folate (Folic Acid) (LabCorp)Covered components: Folate (Folic Acid), SerumBlacklisted States: MD, NJ, NY, RI$29.00Covered tests: Renal Function Panel (partial) (LabCorp)
Extra tests (click to add to search): Renal Function Panel (partial) (LabCorp)
Covered components: AlbuminExtra components (click to add to search): eGFR If NonAfricn Am, eGFR If Africn Am, Glucose, BUN, Creatinine, BUN/Creatinine Ratio, Sodium, Potassium, Chloride, andBlacklisted States: NJ, RI, NY$31.89Covered tests: Vitamin B12 (LabCorp)Covered components: Vitamin B12Blacklisted States: MD, NJ, NY, RI$35.00Health Tests DirectRequisition Charge (per order charge)$8.50$104.39
Order from Health Tests Direct
Step 1: Add to cart - for each panel below click "Add to Cart" button and then close the new tab.
- Click Add to Cart then close the new tab (Renal Function Panel $31.89)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $40.39 ( $31.89 panels price + $8.50 requisition charge)Order from HealthLabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Folic Acid (Folate) Test $29.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 Test $35.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $64.00 -
$107.10
$39.60Covered tests: Vitamin B12 and Folates (LabCorp)Covered components: Vitamin B12, Folate (Folic Acid), SerumBlacklisted States: MD, NJ, NY, RI$59.00Health Tests DirectRequisition Charge (per order charge)$8.50$107.10
Order from Health Tests Direct
Step 1: Add to cart - for each panel below click "Add to Cart" button and then close the new tab.
- Click Add to Cart then close the new tab (Albumin, Serum $39.60)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $48.10 ( $39.60 panels price + $8.50 requisition charge)Order from HealthLabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 & Folic Acid Test $59.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $59.00 -
$107.20
Covered tests: Folate (Folic Acid) (LabCorp)Covered components: Folate (Folic Acid), SerumBlacklisted States: MD, NJ, NY, RI$29.00Covered tests: Vitamin B12 (LabCorp)Covered components: Vitamin B12Blacklisted States: MD, NJ, NY, RI$35.00$107.20
Order from HealthLabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Folic Acid (Folate) Test $29.00)
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Vitamin B12 Test $35.00)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $64.00Order from EconoLabs
Step 1: Add to cart - for each panel below click "Buy Online" button. This will open in a new tab. Click "Add to Cart" button there, and then close the tab.
- Click Buy Online then "Add to Cart" button in the new tab. Close the tab. (Albumin, Serum $43.20)
Step 2: Checkout - go to Checkout and complete the checkout process there. Your total price should be $43.20
Understanding of Lab Tests Results
Please visit the site associated with The American Association for Clinical Chemistry (AACC) for better understanding of tests. There you will find the most detailed and full information regarding lab tests. In "common questions" tab you will find answers on the most common questions.
In addition, you can use a special form to ask the question. It is useful, if there is no answer on your question on the web site. A laboratory scientist will answer your question. It is a part of voluntary service provided by the American Society for Clinical Laboratory Science.