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FT4 (Free Thyroxine) Test Price, Report & Procedure

FT4 test measures the level of unbound thyroid hormone in the blood, aiding in diagnosing thyroid disorders and monitoring thyroid function.

Free Thyroxine (ft4) Test Info & Procedure

Group NameTHYROID PREGNANCY
FastingFasting not required
Sample TypeSERUM
Sample CollectionHome sample collection
ReportsMost reports: 24–48 hours after the sample reaches the lab; timing varies by test.
Report typeDigital report

Free Thyroxine (ft4) Test Visual Guide

Measures free T4 hormone to support thyroid function interpretation.

Technician collecting a blood sample from a woman at home

Download Free Thyroxine (ft4) Test Visual Guide infographic (PNG)

ResultReported in ng/dL.
What it showsCurrent free T4 hormone.
SampleSerum. No fasting required.
Common useThyroid hormone status.

How FT4 Works

  1. Thyroid releases T4Major thyroid hormone
  2. Free T4 measuredUnbound active fraction
  3. Pattern reviewedRead with TSH/FT3

Typical result context

Result contextGuide
Typical adultabout 0.8 - 1.8 ng/dL
Low FT4underactive pattern
High FT4overactive pattern

Reference intervals vary by method, pregnancy and lab platform.

Why it may be advised

  • Thyroid function review
  • Abnormal TSH follow-up
  • Medicine monitoring

When to discuss it

  • Fatigue
  • Weight change
  • Pregnancy thyroid review

Often reviewed with

  • TSH
  • FT3
  • Anti-TPO antibody

Simple Testing Flow

  1. BookSelect FT4 test online
  2. Home VisitCollection executive arrives
  3. SampleSample collected as instructed
  4. Lab ReportProcessed and shared digitally

Simple prep

  • Usually no fasting
  • Share thyroid medicine use

May affect result

  • Biotin supplements
  • Pregnancy
  • Thyroid medicines

Hormone level

  • Best read with TSH
  • Symptoms add context

About the Test

Free Thyroxine (ft4) is a laboratory test that measures a result in a Blood (Serum) sample. It may be ordered to investigate symptoms, support a diagnosis or monitor a condition, depending on your clinician's advice.

The current booking price is shown at Rs. 288 against an MRP of Rs. 300, inclusive of taxes where applicable.

No fasting is required for this test alone. If another test in the same order requires fasting, follow its preparation instructions. Home sample collection is available in serviceable cities. A trained phlebotomist collects the sample using sterile equipment, and the report is shared online after processing.

Free Thyroxine (ft4) blood test sample collection

Free Thyroxine (FT4) Reference Guide

Reference ranges vary by laboratory and method. Use the range printed on your final report. The information below is educational only.

General Educational Range (Not a Report Range)

MeasureTypical guideNote
Result unitng/dL or pmol/LUse the reference range printed on your final report.
High FT4Above lab rangeMay support overactive thyroid review when TSH is low.
Low FT4Below lab rangeMay support underactive thyroid review when TSH is high.

Why This Test Is Ordered

ReasonDescription
Thyroid functionMeasures the active unbound T4 hormone.
TSH follow-upHelps explain abnormal TSH results.
Treatment trackingOften used while monitoring thyroid medicine.

Symptoms And Who Should Test

SituationDescription
High thyroid symptomsWeight loss, fast heartbeat, heat intolerance, tremor, anxiety.
Low thyroid symptomsFatigue, weight gain, cold intolerance, constipation, dry skin.
Follow-up usersPeople with thyroid disease, pregnancy thyroid review or medicine monitoring.

Preparation And Interpretation Notes

TopicGuidance
FastingNo fasting is required for this test alone. If another test in the same order requires fasting, follow its preparation instructions.
Medicine timingThyroid tablets and supplements may affect interpretation.
Best read withTSH, FT3 and symptoms.
Sources: MedlinePlus Thyroxine T4 Test, MedlinePlus Thyroid Tests

Home sample collection for Free Thyroxine (ft4) is available in the cities below, subject to confirmation of your pincode at booking.

Bangalore Chennai Delhi Hyderabad Kolkata Mumbai Pune Ahmedabad Jaipur Lucknow Coimbatore Chandigarh Agartala Agra Ahmednagar Ajmer Akola Aligarh Allahabad Alwar Ambala Amravati Amritsar Anand Araria Aurangabad Bahraich Ballia Banda Bardhaman Bareilly Basti Beed Begusarai Bhagalpur Bhilwara Bhiwani Bhopal Bhubaneswar Bidar Bikaner Birbhum Bulandshahr Cachar Chandrapur Chittoor Cuttack Dakshina Kannada Darbhanga Darjeeling Datia Dehradun Deoghar Deoria Dewas Dhanbad Dharmapuri Dhule Durg East Champaran East Godavari East Singhbhum Erode Etah Faizabad Faridabad Gandhinagar Ganjam Gaya Ghaziabad Ghazipur Godda Gonda Gorakhpur Guntur Gurdaspur Gurgaon Guwahati Gwalior Haridwar Hathras Hazaribagh Hisar Hooghly Hoshangabad Howrah Indore Jabalpur Jajpur Jalandhar Jalgaon Jalna Jammu Jamnagar Jamshedpur Jamui Jaunpur Jhajjar Jhansi Jharsuguda Jodhpur Kadapa Kalaburagi Kamrup Kanchipuram Kanpur Kanyakumari Karimnagar Karnal Katihar Katni Kendujhar Khammam Kheda Kishanganj Kochi Koderma Kolhapur Koraput Kota Kozhikode Krishna Krishnagiri Kurnool Latur Ludhiana Madhubani Madurai Mandla Mangalore Mathura Mayurbhanj Medak Medinipur Meerut Mohali Moradabad Munger Muzaffarnagar Muzaffarpur Mysore Nagpur Nainital Nalanda Nalgonda Namakkal Nanded Narsinghpur Nashik Navi Mumbai Nellore Nizamabad Noida North 24 Parganas North Dinajpur Palghar Panchkula Panipat Patiala Patna Pedakurapadu Peddapalli Pondicherry Prakasam Pratapgarh Puri Purnia Raebareli Raigarh Raipur Raisen Rajahmundry Rajkot Rajnandgaon Ranchi Rangareddy Ratlam Ratnagiri Rewa Rohtak Sagar Saharanpur Saharsa Sahibzada Ajit Singh Nagar Salem Sambalpur Sangareddy Saran Satara Secunderabad Seraikelakharsawan Sibsagar Siddipet Sitamarhi Solapur Sonbhadra South 24 Parganas Srinagar Sultanpur Sundargarh Surat Surguja Thane Thanjavur Thiruvananthapuram
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Profiles Including This Test

Free Thyroxine (ft4) Test Price

Test conducted by Thyrocare partner laboratory Thyrocare Technologies Limited
Thyrocare partner laboratory
Rs. 300
Rs.288 4% Off
Free Home Sample Collection
Pay after sample collection
CAP Accredited NABL Accredited UKAS Management Systems ANAB Accredited

Why Choose Thyrocare for Free Thyroxine (ft4)

Review the preparation guidance, sample type, home collection availability and report information before booking Free Thyroxine (ft4). The final collection and reporting details are confirmed during booking.
Home sample collection for diagnostic testing

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at an Unbeatable Price


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Laboratory Processing

Your sample is collected by a trained phlebotomist and sent to the partner laboratory for analysis. The laboratory processes the sample using its validated procedures and quality controls. Your final report shows the result, unit and reference range used for that test. Discuss an unexpected or abnormal result with your clinician.