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Complement C4 Blood Test from Mito Health

Labbrary Test GradeUseful
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Not calculated

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Measures complement C4 concentration, a classical-pathway component used when evaluating complement consumption or deficiency. Interpret it with C3, other selected immune tests, symptoms and the broader clinical picture.

Current price
$7.90 from $17.40 with fees
Sample
Blood
Turnaround
1 to 2 days
Access
Lab Visit, Order Online
Evidence & Key Facts
Source collectedLast source check August 30, 2026

Evidence basis. This named result reflects the sources and verification evidence listed on this page as of the date shown.

Best for

Autoimmune Health

Standout strength

Online ordering includes the required laboratory order through Mito.

Important watch-out

Labcorp and Quest are offered in 47 states and Washington, DC; BioReference is offered in NJ, NY and RI. Laboratory selection and price depend on your state.

Complement C4 Blood Test from Mito Health
Labbrary Test GradeUseful
Your Fit Score
Not calculated

Answer five questions to see how this panel matches your goals, budget, collection preferences, access, and support needs.

Calculate my fit

Labbrary's review, Fit Score, and basic comparison are free. The provider's panel, shipping, collection, clinician review, and other services are separate. About 2 minutes. No account required.

Measures complement C4 concentration, a classical-pathway component used when evaluating complement consumption or deficiency. Interpret it with C3, other selected immune tests, symptoms and the broader clinical picture.

Current price
$7.90 from $17.40 with fees
Sample
Blood
Turnaround
1 to 2 days
Access
Lab Visit, Order Online
Evidence & Key Facts
Source collectedLast source check August 30, 2026

Evidence basis. This named result reflects the sources and verification evidence listed on this page as of the date shown.

Best for

Autoimmune Health

Standout strength

Online ordering includes the required laboratory order through Mito.

Important watch-out

Labcorp and Quest are offered in 47 states and Washington, DC; BioReference is offered in NJ, NY and RI. Laboratory selection and price depend on your state.

Labbrary+

The Test Grade. The Reason Behind It.

Potentially useful for the right buyer, with meaningful evidence, coverage, transparency, access, cost, terms, or privacy tradeoffs to review.

A lower grade does not mean a panel is a bad personal fit. Your Fit Score can be higher when its purpose, price, sample, access, or support matches what you need.

Explore the Full Methodology
Labbrary Test GradeUseful

Next step

Check the panel or research the provider

Prices, availability, and ordering requirements can change. Confirm the current details before purchasing.

View Exact Panel on Provider SiteView Mito Health profile

Scope, both directions

Inside the Panel. Beyond the Name.

Named measurements

  • Complement C4

Measured categories and focus areas

  • Autoimmune
  • Autoimmune Health

Important limits and omissions

  • Exact order or draw fees and order-specific refund terms remain unconfirmed.
  • Exact analytical method, performing laboratory and offer-specific validation remain unconfirmed.
  • Exact specimen retention and sharing terms remain unconfirmed under the provider privacy policy.

The full breakdown

Eight Dimensions.
One Named Result.

Open any row for the reasoning and evidence behind the named result.

Measurement quality is partial: exact offer names laboratory system(s) Labcorp; Quest Diagnostics and states collection at a CLIA/CAP-accredited lab. Seller Mito Health, collection route, and ordering clinician are separated above. A laboratory system name does not identify the exact performing facility, the assay method, or offer-specific analytical performance. Limitation: Measurement quality is partial: exact offer names laboratory system(s) Labcorp; Quest Diagnostics and states collection at a CLIA/CAP-accredited lab. Seller Mito Health, collection route, and ordering clinician are separated above. A laboratory system name does not identify the exact performing facility, the assay method, or offer-specific analytical performance. No score or grade assigned.

Known or suspected lupus, and monitoring disease activity over time Recurrent episodes of angioedema without hives, raising the question of hereditary angioedema Working up unexplained glomerulonephritis, vasculitis, or serum sickness Recurrent pyogenic bacterial infections suggesting a possible inherited complement deficiency Tracking complement levels alongside C3 during a known immune-complex condition. Limitation: No additional limitation was recorded in the authority row.

Measures: Mass concentration What you'll learn Insights that connect the dots. Limitation: Complete named list not re-verified against the current page in this pass.

Reviewed by a real clinician. Results arrive in your dashboard. Limitation: No additional limitation was recorded in the authority row.

$5.64 Member price | $7.90 Non-member. Limitation: Draw/order fees and order-specific exceptions may apply; confirm before payment.

Find labs near you; lab-drawn collection. Limitation: Local booking availability requires confirmation.

Cash price $7.90 non-member / $5.64 member. HSA/FSA eligible. Limitation: Exact-offer refund terms not stated on the product page; shared Terms of Service govern refunds and credits.

Mito Health Privacy Policy governs data handling: https://mitohealth.com/privacy. Limitation: Exact-offer data retention and sharing terms not stated on the product page.

What it asks of you

Sample and fulfillment journey

Order

Confirmed

Choose this test, your state and an available laboratory online. Mito provides the laboratory order when required.

Panel-specific source · Source dated September 10, 2026

Collect

Confirmed

Visit the selected laboratory for a blood draw. Labcorp test 001834 requests 1 mL serum, which is preferred, or plasma for adults, accepts red-top, gel-barrier, lithium-heparin or K3-EDTA tubes, and requires serum to clot for 15 to 30 minutes before separation and transfer to a plastic transport tube. Quest test 353 requests 1 mL serum with refrigerated transport in a transport tube and identifies an immunoturbidimetric C4c measurement. Exact BioReference technical handling for code 0533-0 was not independently assessed, so follow that laboratory's order-specific instructions. Fasting is not required by Mito. Note marked lipemia and elevated rheumatoid factor because Labcorp states that these can increase apparent C4 concentration. Follow the selected laboratory's complete order instructions.

Panel-specific source · Source dated September 10, 2026

Report

Confirmed

Results appear in the Mito dashboard after laboratory processing. A personalized action plan requires membership; live consultations cost extra.

Panel-specific source · Source dated September 10, 2026

Under the hood

Follow the Evidence.

Every published claim should trace to a dated source. Missing evidence remains visible instead of being filled with assumptions.

Source 1Recorded for this record. Last source check August 30, 2026.View source

True total cost

The Price. Plus the Details.

Pricing for Complement C4 Blood Test
ItemCurrent disclosed priceNote
Panel$7.90Verify the checkout total, shipping, and collection fees before ordering.
Lab draw fee+ $9.50 to $15Per lab visit, added at checkout. One applies, depending on the lab you use: BioReference $9.50, Labcorp $11.50, Quest $15. Checked September 29, 2026. Source
Total at checkoutFrom $17.40Listed price plus the required fees above, before tax and any optional services.
HSA/FSA paymentConditional eligibilityThis test is marked HSA/FSA eligible. Your plan determines individual eligibility and reimbursement.
Optional servicesAt-home phlebotomist, $99Only if you choose it. Not included in the total. Checked September 29, 2026. Source

Price status. This record shows disclosed pricing. Checkout costs can change and should be verified before purchase.

Your data

Your Data. Your Questions.

Privacy details are scored only when source documentation is available. Unconfirmed retention, deletion, research use, or marketing practices remain unconfirmed.

Reading the labels

What Has Been Checked?

Source collected

Evidence labels stay separate from the Test Grade. They show how much source support exists for the evaluation.

The balance

The Strengths. The Tradeoffs.

Strengths

  • Online ordering includes the required laboratory order through Mito.
  • Measures complement component C4 concentration in serum or plasma as one result. Quest labels order 353 Complement Component C4c, while Labcorp labels order 001834 Complement C4. This is not C3, C4a, CH50 functional activity, an autoimmune panel or a diagnosis.
  • Results are delivered to the Mito dashboard after laboratory processing.

Watch-outs

  • Labcorp and Quest are offered in 47 states and Washington, DC; BioReference is offered in NJ, NY and RI. Laboratory selection and price depend on your state.
  • The starting test price of $7.90 is the Quest Diagnostics nonmember option outside NJ, NY and RI, before its separate order fee. Other laboratory options have different prices and fees.
  • Labcorp test 001834, for 47 states and Washington, DC, excluding NJ, NY and RI: $105.59 without membership or $75.42 with optional $9 monthly membership, plus a separate $11.50 order fee.
  • BioReference test 0533-0, for NJ, NY and RI: $16.05 without membership or $11.46 with optional $9 monthly membership, plus a separate $9.50 order fee.
  • Quest Diagnostics test 353, for 47 states and Washington, DC, excluding NJ, NY and RI: $7.90 without membership or $5.64 with optional $9 monthly membership, plus a separate $15.00 order fee.
  • Membership is optional. The final checkout total, cancellation and refund terms remain unverified.
  • Typical results take 1-2 days; this is not a guaranteed order-to-result deadline.
  • Complement C4 concentration is not a diagnosis and does not measure complete complement-system function. Quest labels its target C4c, and Labcorp warns that excessive lipemia and high rheumatoid factor can increase apparent C4 concentration. Interpret the laboratory-specific result with C3, CH50 when clinically selected, symptoms and clinician guidance.
  • Fasting is not required by Mito. Note marked lipemia and elevated rheumatoid factor because Labcorp states that these can increase apparent C4 concentration. Follow the selected laboratory's complete order instructions.
  • Results appear in the Mito dashboard after laboratory processing. A personalized action plan requires membership; live consultations cost extra.
  • This test is marked HSA/FSA eligible. Your plan determines individual eligibility and reimbursement.

Take it with you

The Test Truth Card

The key facts from this review in one compact card.

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Verification History

August 30, 2026Recorded source date.Source collected

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