Where to Find Your Weight From When GLP-1 Was First Prescribed

Why Your Baseline Weight Matters Clinically

Knowing your exact starting weight is not a vanity metric. It is the clinical denominator used to calculate percentage total body weight lost, which is the endpoint that predicts cardiovascular and metabolic benefit.

In the STEP-1 trial (N=1,961), semaglutide 2.4 mg (Wegovy) produced a mean 14.9% reduction in body weight from a documented baseline over 68 weeks, compared with 2.4% in the placebo group (P<0.001) [1]. Without a verified starting number, you cannot know whether you have matched, exceeded, or fallen short of that benchmark. The SURMOUNT-1 trial (N=2,539) found that tirzepatide 15 mg produced a 20.9% mean weight reduction from baseline at 72 weeks [2]. Both trials required a precisely recorded baseline weight at the screening visit. Your own care should mirror that standard.

Percentage Body Weight Lost vs. Absolute Pounds

Clinicians and guidelines track percentage body weight lost rather than raw pounds because it normalizes for starting size. A 30-pound loss means very different things for a 180-pound person versus a 350-pound person. The American Diabetes Association's 2024 Standards of Care note that "5% or greater weight loss is considered clinically meaningful, with 10 to 15% associated with improvements in glycemia, blood pressure, and lipids" [3]. Without a baseline, you lose the ability to calculate your personal percentage.

How Long You Have Been on Therapy Also Matters

GLP-1 receptor agonists produce weight loss along a time-dependent curve. Semaglutide reaches its maximum weekly dose of 2.4 mg only after a 16-to-20-week titration schedule [4]. Knowing the exact prescription date lets your clinician assess whether you are on track relative to the expected dose-response trajectory, or whether dose adjustment is warranted.

Source 1: Your Patient Portal (Fastest Option)

Patient portals are the fastest, most reliable first stop. Most U.S. Clinics and health systems now use certified electronic health record (EHR) platforms that feed visit data directly into a patient-facing portal, typically within 24 to 72 hours of your appointment.

How to Find the Visit Note

1. Log in to your portal (MyChart, Healow, athenahealth Patient Portal, or your hospital's branded equivalent).
2. Manage to "Visits," "Appointments," or "Health Records."
3. Filter by the date your GLP-1 was first prescribed.
4. Open the visit summary or after-visit summary. Vital signs, including weight in pounds or kilograms, appear in a dedicated section near the top of the note.
5. If the portal shows only a summary, request the full "office visit note" or "SOAP note." Under the 21st Century Cures Act's information-blocking provisions, clinicians are required to release these notes to patients electronically without delay [5].

What If the Portal Shows No Weight?

Some telehealth-only visits record weight via patient self-report during the intake form rather than an in-office scale. In that case, the weight entered by the patient at intake may appear under "Social History" or "Health Summary" rather than "Vital Signs." Check both sections. If neither contains a number, move to Source 2 below.

Source 2: Your Prescribing Clinician's Office Records

If the portal does not surface the data, a direct records request to the prescribing clinic is your next move.

HIPAA Rights and Timelines

Under 45 CFR § 164.524, you have the right to inspect and receive a copy of your protected health information [6]. The covered entity (your clinic) must act on your request no later than 30 days after receipt. Fees must be "reasonable and cost-based," which in practice means most portals provide electronic records at no charge. Certified mail or a signed records-release form submitted in person typically produces faster results than phone requests.

What to Ask For

Be specific in your request. Ask for:

• The visit note from the date the GLP-1 was first prescribed (provide the exact date if you know it, or request the first prescription encounter for the drug by name, such as semaglutide or tirzepatide)
• Vital signs documented at that visit
• The medication order or prescription record showing the initiation date

A one-page records request letter citing 45 CFR § 164.524 is usually sufficient [6].

Source 3: Pharmacy Dispensing Records and Prior-Authorization Documents

Pharmacies retain dispensing records, and those records sometimes include clinical data submitted for prior authorization.

Pharmacy Fill History

Your dispensing pharmacy stores a fill history that shows the first fill date for each medication. While the pharmacy record itself may not include your weight, the first fill date helps you identify the exact day to target when requesting your clinical visit note from the prescriber. Ask the pharmacy for a "medication history report" or "prescription fill summary."

Prior-Authorization Forms

GLP-1 medications such as Wegovy (semaglutide 2.4 mg) and Zepbound (tirzepatide) require prior authorization from most commercial insurers and Medicare Part D plans. The FDA-approved labeling for Wegovy specifies that it is indicated as an adjunct to reduced-calorie diet and exercise in adults with an initial BMI of 30 kg/m² or greater, or 27 kg/m² or greater in the presence of at least one weight-related comorbidity [7]. Because BMI requires both height and weight, every prior-authorization form submitted on your behalf contains your documented weight at the time of the request. Request a copy from your insurer's member services line or your prescriber's billing department. This document frequently carries a date stamp that aligns precisely with the prescription initiation.

Source 4: Telehealth Platform Intake Records

If your GLP-1 was prescribed through a telehealth platform such as HealthRX, your intake questionnaire responses are stored in your account and typically include self-reported height and weight.

Accessing HealthRX Intake Data

HealthRX stores patient-entered vitals from the initial intake assessment in your secure account dashboard under "My Health Profile." To retrieve your baseline weight:

1. Log in at healthrx.com.
2. Select "My Records" from the top navigation.
3. Choose "Intake Assessment" and filter by the earliest date on file.
4. Your self-reported weight and BMI at enrollment appear in the vitals section of that document.

If the platform has updated its interface since your enrollment, contact HealthRX support at the help email listed in your account; support can retrieve archived intake snapshots for any date.

A Note on Self-Reported vs. Measured Weight

Self-reported weight tends to underestimate true weight by approximately 1 to 2 kg on average, based on data from 3,075 adults in the National Health and Nutrition Examination Survey (NHANES) [8]. For clinical percentage-loss calculations, measured weight from a clinician visit is preferable. If your only record is a self-reported intake value, note that qualification when reviewing your progress with your clinician.

Source 5: Personal Health Apps and Wearable Devices

Many patients sync a smart scale or manually log weight in an app such as Apple Health, Google Fit, Withings Health Mate, or MyFitnessPal before or around the time they start a GLP-1.

How to Check App History

• Apple Health: Open the Health app, tap "Browse," select "Body Measurements," then "Body Weight." Tap the chart and switch to "All Time" view to scroll back to your earliest recorded date.
• Google Fit: Open the app, tap "Journal," and filter by "Weight." Scroll to the earliest entry.
• Withings Health Mate: Manage to "Timeline," then filter by "Weight." The app exports a full CSV file from "Settings" if you need a printable record.
• MyFitnessPal: Go to "Progress," select "Weight," and toggle to "All Time." Export via "Settings" > "Export Data."

A weight logged within two weeks of the prescription date is clinically acceptable for benchmarking purposes in most practice settings, though your clinician makes the final determination.

Source 6: Lab Requisition Forms and Metabolic Panels

Before initiating a GLP-1, many clinicians order baseline laboratory work including a comprehensive metabolic panel, HbA1c, fasting lipids, and thyroid function. Lab requisition forms submitted to LabCorp, Quest Diagnostics, or a hospital laboratory often include the patient's recorded weight at the time of the order.

Retrieving Lab-Linked Vitals

Log in to your LabCorp Patient or Quest MyQuest portal and open the requisition associated with the order date closest to your GLP-1 start date. Scroll to the "Patient Information" or "Clinical Information" section of the requisition PDF. Weight, BMI, and relevant diagnoses are commonly pre-populated there by the ordering clinician to support medical necessity. The FDA's guidance on GLP-1 prescribing criteria for obesity, referenced in the Wegovy prescribing information, requires documentation of qualifying BMI, making this weight entry a regulatory necessity rather than optional [7].

What to Do If No Record Exists

Some patients, particularly those who started a GLP-1 through a small independent clinic or an early telehealth platform, find that no weight record is available for the prescription date.

Reconstruct From Corroborating Data

If direct documentation is missing, gather the following:

• Your earliest pharmacy fill date for the GLP-1 (establishes the prescription window)
• Any physician or urgent-care visit note within 60 days of the fill date that contains a measured weight
• Old insurance explanation-of-benefits (EOB) statements that reference office visit codes, which help identify dates to request records for
• Photos, screenshots, or fitness app exports that contain a date-stamped weight

A reasonable reconstruction approach is to use the closest measured weight within a 30-day window of the prescription date, clearly documented as an estimate. The Endocrine Society's 2023 clinical practice guideline on obesity pharmacotherapy recommends that clinicians document baseline weight before initiating any anti-obesity medication and re-measure at each follow-up [9]. If your original clinician did not do this, your current provider can note the estimate formally in your chart for future reference.

Request a Medical Records Audit

If you believe records exist but cannot access them, you may file a complaint with the U.S. Department of Health and Human Services Office for Civil Rights under HIPAA [10]. You may also contact your state medical board, which maintains licensing standards that include medical record retention requirements (typically 7 to 10 years for adults in most states).

How to Calculate Your Progress Once You Have the Baseline

Once you locate your starting weight, the calculation is straightforward.

Percentage total body weight lost = ((Starting weight minus Current weight) divided by Starting weight) times 100

For example, a starting weight of 240 pounds and a current weight of 204 pounds yields an 18-pound loss, which equals 7.5% total body weight lost. That figure falls within the range associated with clinically meaningful improvements in HbA1c and systolic blood pressure, per the ADA's 2024 Standards of Care [3].

Tracking Intervals That Match Trial Protocols

The STEP-1 trial assessed weight at weeks 4, 8, 12, 16, 20, 28, 40, 52, and 68 [1]. The SURMOUNT-1 trial used assessments at weeks 4, 8, 12, 20, 28, 36, 52, and 72 [2]. Aligning your personal weigh-in schedule with these intervals makes it easier to compare your trajectory against published benchmarks and gives your clinician a clinically interpretable dataset. Weigh yourself at the same time of day, on the same scale, wearing similar clothing, preferably in the morning after voiding.

Interpreting Slower-Than-Expected Progress

A weight plateau or slower-than-expected response does not always indicate treatment failure. Body composition changes, fluid shifts during titration, and dose-dependent response curves all influence the short-term number on the scale. The STEP-5 trial (N=304) demonstrated that semaglutide 2.4 mg continued to produce additional weight loss through 104 weeks, with a mean reduction of 15.2% from baseline at 2 years [11]. If your progress appears stalled at 16 to 20 weeks, discuss dose optimization or adjunctive behavioral interventions with your prescriber before drawing conclusions.

Organizing and Storing Your Baseline Weight Record

Once found, store your baseline weight in at least two places to prevent future loss.

Documentation Best Practices

• Save a PDF copy of the relevant visit note, portal printout, or pharmacy record to a secure cloud folder (Google Drive, iCloud, or a HIPAA-compliant health records app such as Apple Health's medical ID).
• Enter the date and weight manually into your preferred health tracking app as a historical data point.
• Ask your current prescriber to formally document the verified baseline weight in your active chart, even if the original visit was at a different practice.
• Consider sharing the record with your pharmacist; pharmacies can annotate their dispensing records with clinician-provided information in many state systems.

Obesity pharmacotherapy with GLP-1 agents is a long-term intervention. The Endocrine Society's 2023 guideline states that anti-obesity medications generally need to be continued indefinitely to maintain weight loss [9]. A well-preserved baseline record supports that long-term clinical relationship.

When to Involve Your Current Clinician

Your current prescriber can help in several situations: the original clinic has closed, records were destroyed in a practice transition, or you transferred care across state lines. Clinicians can submit formal inter-provider records requests, access state prescription drug monitoring program (PDMP) data to verify the first prescribe date, and document a clinician-adjudicated baseline estimate in your active chart. The CDC's chronic disease management guidelines for obesity recognize clinician-documented estimates as acceptable when primary records are unavailable [12].

Insurance appeals for continued GLP-1 coverage sometimes require proof of baseline BMI and weight-loss progress. A formally documented baseline, even a reconstructed one, strengthens those appeals. The FDA label for semaglutide 2.4 mg specifies that clinicians should evaluate response at 16 weeks; if less than 5% weight loss from baseline is documented, discontinuation should be considered [7]. That evaluation is impossible without a baseline.