Tirzepatide
(Mounjaro, Zepbound) in Illinois
Physicians across Illinois from the federal NPI registry. Ask each office whether it prescribes Mounjaro or Zepbound.[9]
- Mounjaro: FDA-approved for type 2 diabetes.
- Zepbound: FDA-approved for chronic weight management, and obstructive sleep apnea with obesity.
Same molecule (tirzepatide): Mounjaro in Illinois, Zepbound in Illinois
Other GLP-1 medicines: Ozempic in Illinois, Wegovy in Illinois, Semaglutide in Illinois
Find a physician in Illinois.
Every entry comes from the federal NPI registry. Ask each office what it prescribes. We do not accept payment for placement.
The list above samples the largest towns. Each town page below lists every physician there, 1,485 across Illinois.
How a prescription works in Illinois.
You don’t have to leave Illinois to start. Because tirzepatide isn't a controlled substance, a Illinois-licensed prescriber can evaluate you by telehealth and send the script to a pharmacy near you, or you can see one of the 1485 local providers below in person. What you pay depends on your plan, not your zip code.
Medicaid status above is for weight-loss use and was compiled April 2026 from KFF and public Medicaid trackers; only 13 states cover it and several are mid-change, so confirm Illinois’s current Medicaid and plan rules before booking. GLPHelper provides information and provider matching, not medical or coverage advice.
The molecule in Mounjaro and Zepbound. It acts on two gut-hormone pathways, GIP and GLP-1.
Tirzepatide is a once-weekly injection sold by Eli Lilly as Mounjaro (for type 2 diabetes) and Zepbound (for chronic weight management). It is the first approved dual GIP/GLP-1 receptor agonist. It activates two gut-hormone pathways rather than one, which is associated with greater average weight loss than single GLP-1 agonists.[2][3]
In SURMOUNT-1, adults with obesity (without diabetes) lost a mean of 20.9% of body weight on the 15 mg dose at 72 weeks, versus 3.1% on placebo. In the SURPASS-2 head-to-head diabetes trial, tirzepatide produced larger HbA1c and weight reductions than semaglutide 1 mg.[1]
What the trials actually showed.
We summarize the SURMOUNT weight-management program and the SURPASS diabetes program, including the SURPASS-2 head-to-head against semaglutide. Figures are means at each trial's primary endpoint.
Most Tirzepatide side effects are stomach and gut effects.
In Zepbound's weight trials at 5 to 15 mg, the most common side effects were nausea (25 to 29%), diarrhea (19 to 23%), constipation (11 to 17%), and vomiting (8 to 13%). Mounjaro's diabetes trials showed lower rates at the same doses.[1] Serious events were rare but include pancreatitis, gallbladder disease, and an FDA boxed warning regarding thyroid C-cell tumors based on rodent data.[1]
What Tirzepatide costs, by how you pay.
The price you pay depends on your insurance plan, your diagnosis, and how you buy. Manufacturer self-pay programs cost far less than pharmacy retail. Here are the ranges.
Data sources: GoodRx national retail survey[6], CMS Part D formulary files[5], Eli Lilly self-pay and savings pages.
Self-pay and savings card prices checked . Retail averages from May 2026.
| Zepbound, pharmacy retail | $1,000 to $1,300 | per month | Brand-name retail average, May 2026[6] |
|---|---|---|---|
| Zepbound, LillyDirect self-pay | $299 to $699 | per month | KwikPen by dose: 2.5 mg $299, 5 mg $399, 7.5 mg $499, 10 to 15 mg $699. The $449 offer on 7.5 to 15 mg applies to the first purchase and to refills within 45 days. Vials start at $299 |
| Mounjaro, pharmacy retail | $1,000 to $1,200 | per month | Brand-name retail average, May 2026[6] |
| Commercial insurance (T2D) | $25 to $250 | per month copay | Usually covered for diabetes with prior authorization |
| Commercial insurance (weight) | Often denied | Zepbound is on-label but frequently requires PA | |
| Medicare Part D | $0 to $100 | per month | Type 2 diabetes covered. Zepbound KwikPen for weight management is $50 a month through the Medicare GLP-1 Bridge, Jul 2026 to Dec 2027[5] |
| Manufacturer savings card | as low as $25 | per month | Commercial insurance only; eligibility limits apply |
Physicians from the federal NPI registry. Ask each office whether it prescribes Tirzepatide.
Physicians from the federal NPI registry in the states we cover. Ask each office whether it prescribes Tirzepatide.
The questions people ask before they book.
Answers reviewed by the glp·helper Medical Team. Citations link to primary sources, never marketing copy.
Tirzepatide is the active ingredient in two Eli Lilly brands: Mounjaro and Zepbound. No generic tirzepatide is FDA-approved in the US. Mounjaro is approved for type 2 diabetes; Zepbound is approved for chronic weight management. They share an active ingredient but carry different approved indications, and insurers treat them as separate products.[1]
In the SURPASS-2 head-to-head diabetes trial, tirzepatide produced greater HbA1c reductions and greater weight loss than semaglutide 1 mg across all doses. Tirzepatide also showed higher average weight loss in its obesity trials (up to ~20.9%), though the two have not been compared head-to-head for weight loss at their maximum weight-management doses.[3]
Yes. Tirzepatide is a prescription-only medicine. The Mounjaro and Zepbound labels both say Rx only. A licensed prescriber (MD, DO, NP, or PA) must evaluate you before issuing a prescription.[1]
In most states, yes. Telehealth prescribing is permitted once a practitioner-patient relationship is established, typically via a synchronous video visit, by a provider licensed in your state.[1]
Glucose effects appear within the first weeks. Weight effects accrue over several months as the dose is escalated from 2.5 mg toward maintenance; trials measured peak effects at 72 weeks.[2]