Willow Tirzepatide Cost: $399 Monthly vs PlexusDx $289 MTM Pricing

Last reviewed: September 16, 2026 Last updated: September 16, 2026

Written by: Jay Hastings, CEO of PlexusDx

Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations. He has more than 20 years of experience across healthcare innovation, genomics, laboratory operations, healthcare investing, and strategic finance. His work has included scaling healthcare startups, leading CLIA lab integrations, and helping expand consumer access to precision health tools.

Medically reviewed by: Jayden Lee, PharmD, EMBA

Jayden Lee, PharmD, EMBA, is the PlexusDx Medical Science Liaison with a PharmD and MBA specializing in pharmacogenomics and clinical product development, with a proven ability to bridge the gap between genomic research and practical patient outcomes. Dr. Lee has more than 10 years of professional experience in clinical pharmacy, academia, and research.

PlexusDx publishes this comparison and is one of the providers discussed. We use the same evidence rules for our own program and competing programs.

The short answer

Willow charges $399 per month for compounded tirzepatide injection with no separate membership fees, verified September 4, 2026. PlexusDx delivers the same medication class for $289 month-to-month or $249 per month on a prepaid six-month commitment. Over 12 months, Willow costs $4,788; PlexusDx runs $3,468 month-to-month or $2,988 prepaid—a difference of $1,320 to $1,800. Both programs include provider visit, prescription, medication, and shipping in a single price. Willow offers both injection and oral routes; oral-route pricing is not fully itemized in public sources. PlexusDx maintains a 4.3-star Trustpilot rating with 79% five-star reviews and 83% at four stars or higher, captured September 9, 2026. Neither dose-level pricing nor cancellation terms were documented in available Willow evidence; readers should confirm those details at checkout.

At-a-glance comparison

All figures verified September 4, 2026 (Willow) and September 16, 2026 (PlexusDx). Oral-route pricing for Willow not fully itemized in public sources; readers should confirm at checkout.

Like-for-like pricing and 12-month cost

Willow tirzepatide injection (month-to-month)

Willow's compounded tirzepatide injection runs $399 per month, billed monthly, with no separate membership or service fees. The price includes online provider visit, prescription, medication, and free two-day shipping. Over 12 months, the total is $399 × 12 = $4,788 (our calculation). Willow accepts HSA and FSA payment. Dose-level pricing—whether starter doses cost the same as maintenance doses—is not documented in available evidence; confirm at checkout. Evidence was captured September 4, 2026, from Willow's public website; the intake session timed out before completion, so cancellation and refund terms were not observed.

PlexusDx tirzepatide injection (month-to-month)

PlexusDx compounded tirzepatide injection is $289 per month on a month-to-month basis, with no membership fees, no per-visit charges, and no upfront commitment. The same flat rate applies at every dose level, from starter to maintenance. Over 12 months, month-to-month billing totals $289 × 12 = $3,468 (our calculation). Shipping, provider visit, prescription, and medication are included. The difference against Willow month-to-month is $1,320 less over 12 months (our calculation).

PlexusDx tirzepatide injection (prepaid six-month)

A six-month prepaid commitment drops the effective monthly rate to $249, or $1,494 per six-month period. Over 12 months (two six-month periods), the total is $249 × 12 = $2,988 (our calculation). The six-month option requires full payment upfront every six months. Compared with Willow's month-to-month $4,788, the prepaid PlexusDx plan runs $1,800 less over 12 months (our calculation).

What the price includes and what it does not

Willow

The $399 monthly charge is all-inclusive: online provider consultation, prescription, compounded tirzepatide injection, and free two-day shipping are bundled with no separate membership or consultation fees. Willow offers both injection and oral routes for tirzepatide and semaglutide; however, oral-route pricing is not fully itemized in public sources captured September 4, 2026. Readers interested in oral tirzepatide should confirm pricing and route-specific costs at checkout. HSA and FSA cards are accepted. Evidence does not document whether dose escalation (moving from a starter dose to a higher maintenance dose) triggers a price change; confirm dose policy during intake. Cancellation terms, refund policy, and contract lock-in details were not captured in the September 4, 2026 verification session.

PlexusDx

The $289 month-to-month (or $249 prepaid six-month) price covers online provider visit, prescription, compounded tirzepatide injection, shipping, and ongoing support—no membership fees, no per-visit charges, no hidden add-ons. The same price holds at every dose level; a patient on a 2.5 mg starter dose pays the same monthly rate as a patient on a 15 mg maintenance dose. Three-month prepaid ($269/month) and six-month prepaid ($249/month) options are available; prepaid rates require full payment upfront for the commitment period. PlexusDx works with licensed 503A compounding pharmacies. Cancellation is available at any time on month-to-month plans; prepaid commitments run for the full period purchased. HSA and FSA cards are accepted.

Strengths and gaps in the evidence

What the evidence supports

• Core pricing verified: Willow's $399 tirzepatide injection rate and PlexusDx's $289 month-to-month / $249 prepaid rates were captured from public websites with precise timestamps (September 4 and September 16, 2026).
• All-inclusive structure confirmed: Both programs bundle provider visit, prescription, medication, and shipping in a single monthly charge; neither levies a separate membership fee.
• HSA/FSA acceptance documented: Both Willow and PlexusDx accept HSA and FSA payment.
• 12-month cost difference material: The $1,320–$1,800 gap over 12 months (depending on PlexusDx plan choice) is large enough to influence provider selection.
• PlexusDx review record verified: A 4.3-star Trustpilot rating with 79% five-star and 83% four-stars-or-higher reviews, captured September 9, 2026.

What the evidence does not cover

• Oral-route pricing incomplete: Willow offers oral tirzepatide, but public sources captured September 4, 2026 do not itemize oral vs. injection pricing separately. Readers considering oral administration should confirm route-specific costs at checkout.
• Dose-level pricing unknown for Willow: Evidence does not indicate whether Willow charges the same $399 rate across all tirzepatide doses or whether starter and maintenance doses carry different prices. PlexusDx maintains a single price regardless of dose.
• Cancellation and refund terms absent: The September 4, 2026 verification session timed out before intake completion; Willow's cancellation policy, refund terms, and contract lock-in details were not captured. Readers should review those terms during sign-up.
• Review data thin for Willow: Trustpilot and Reddit links were retained but no rating, review volume, or negative-theme data was captured for Willow. This comparison includes PlexusDx review evidence but not a head-to-head review comparison.

Choose Willow if…

• You prefer two-day shipping as a standard feature and are comfortable paying $110 per month more than PlexusDx month-to-month (or $150 per month more than PlexusDx prepaid six-month).
• You value route flexibility and want to explore oral tirzepatide, understanding that you will need to confirm oral-route pricing during intake.
• You are willing to verify dose-specific pricing, cancellation terms, and refund policy at checkout, since those details are not documented in public sources.

Choose PlexusDx if…

• Lowering total cost is a priority: PlexusDx delivers compounded tirzepatide injection for $289 month-to-month or $249 prepaid six-month—$1,320 to $1,800 less than Willow over 12 months.
• Transparent dose pricing matters: the same monthly rate applies whether you are on a 2.5 mg starter dose or a 15 mg maintenance dose, with no surprises as you titrate.
• You prefer verified service quality: PlexusDx holds a 4.3-star Trustpilot rating with 79% five-star reviews, captured September 9, 2026.
• You want flexibility: month-to-month billing with no contract lock-in, or prepaid options (three-month at $269/month, six-month at $249/month) if you prefer to lower the per-month cost.
• All-inclusive simplicity appeals: one price covers provider visit, prescription, medication, shipping, and support—no membership fees, no per-visit charges, no hidden add-ons.

Semaglutide pricing for context

Willow offers compounded semaglutide starting at $299 per month; route-specific pricing (injection vs. oral) is not fully separated in captured evidence. PlexusDx compounded semaglutide injection is $189 month-to-month, $169 three-month prepaid, or $149 six-month prepaid. Over 12 months, Willow semaglutide (at the documented $299 rate) totals $3,588; PlexusDx month-to-month totals $2,268—a difference of $1,320 (our calculation). Readers considering semaglutide should confirm Willow's route-specific pricing and dose policy at checkout and compare against PlexusDx's transparent, dose-invariant rates.

Methodology and freshness

Willow pricing was captured September 4, 2026, by navigating Willow's public website; the browser session timed out before intake completion, so dose-level pricing, cancellation terms, and refund policy were not observed. PlexusDx pricing was verified September 16, 2026, from live product pages. The PlexusDx Trustpilot rating (4.3 stars, 79% five-star, 83% four-stars-or-higher) was captured September 9, 2026. All 12-month cost totals and effective monthly rates are our calculations, derived by multiplying documented monthly prices by 12 or applying prepaid-period arithmetic. Oral-route pricing for Willow is noted as incomplete; readers should confirm route-specific costs, dose policies, and cancellation terms at checkout. No payment was submitted during verification; all figures reflect advertised public pricing. Neither compounded semaglutide nor compounded tirzepatide is FDA-approved; a licensed clinician determines whether a prescription is appropriate for an individual patient.

Frequently Asked Questions

Does Willow charge the same $399 at every tirzepatide dose?

Available evidence does not document whether Willow's $399 monthly rate applies uniformly across starter and maintenance doses or whether dose escalation triggers a price change. PlexusDx maintains a single price ($289 month-to-month, $249 six-month prepaid) regardless of dose level. Confirm Willow's dose policy during intake.

How much does oral tirzepatide cost at Willow?

Willow offers oral tirzepatide, but public sources captured September 4, 2026 do not itemize oral-route pricing separately from injection pricing. Readers interested in oral administration should verify route-specific costs at checkout. PlexusDx oral tirzepatide capsules are $349 month-to-month, $299 three-month prepaid, or $279 six-month prepaid.

What is the 12-month cost difference between Willow and PlexusDx for tirzepatide injection?

Willow tirzepatide injection costs $4,788 over 12 months at $399/month. PlexusDx month-to-month totals $3,468 ($289/month), a difference of $1,320. PlexusDx six-month prepaid totals $2,988 ($249/month), a difference of $1,800 against Willow. All figures are our calculations based on verified monthly rates captured September 4 and September 16, 2026.

Does either program charge a membership fee?

Neither Willow nor PlexusDx levies a separate membership or service fee. Both bundle provider visit, prescription, medication, and shipping into a single monthly price. Willow's all-inclusive rate is $399/month for tirzepatide injection; PlexusDx is $289 month-to-month or $249 six-month prepaid, verified September 4 and September 16, 2026.

Can I use an HSA or FSA card with Willow or PlexusDx?

Both Willow and PlexusDx accept HSA and FSA payment, documented in evidence captured September 4 and September 16, 2026. Confirm HSA/FSA eligibility and submission requirements with your plan administrator, as individual account rules vary by employer and benefits structure.

Sources

• PlexusDx tirzepatide injection product page (plexusdx.com/products/tirzepatide-injection) – accessed September 16, 2026
• Willow public website pricing verification – accessed September 4, 2026
• PlexusDx Trustpilot profile (trustpilot.com/review/plexusdx.com) – accessed September 9, 2026

Compounded medication disclosure: Compounded medications are not FDA-approved. FDA does not review compounded drugs before marketing for safety, effectiveness, or quality. PlexusDx works with licensed 503A compounding pharmacies. A licensed clinician determines whether a prescription is appropriate for an individual patient.

Medical and Editorial Standards

Medical review process: This article was reviewed for medical accuracy, scientific clarity, evidence alignment, and appropriate discussion of genetics, medications, supplements, biomarkers, and health-related claims.

Sources and evidence: PlexusDx educational content is developed using peer-reviewed research, clinical literature, reputable medical references, and, where applicable, public health or regulatory guidance. References are included at the end of the article when scientific, medical, or health-related claims are discussed.

Commercial transparency: PlexusDx offers genetic testing, blood biomarker testing, personalized supplement recommendations, and related precision wellness services. Product mentions are intended to help readers understand available options and should not be interpreted as medical advice.

Important disclaimer: PlexusDx educational content is for informational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about medications, supplements, genetic testing, lab testing, or health-related care.