Wegovy & Zepbound Prior Authorization Cheat Sheet 2026: Exact ICD-10 Codes, BMI Rules, and Fast-Approval Tips
Skip the guesswork and get your GLP-1 covered on the first try. Below are the precise diagnosis codes, insurer forms, and documentation shortcuts that move Wegovy or Zepbound from “pending” to “approved” in less than three days.
For 2026, most insurers will approve Wegovy or Zepbound when the prior authorization (PA) includes an obesity ICD-10 code (E66.01 or E66.09) and a matching adult BMI code (Z68.35 to Z68.45) plus proof the patient tried lifestyle changes or another anti-obesity drug. Using the correct codes, attaching baseline weight and failed-therapy notes, and submitting through the payer’s electronic portal are the three fastest ways to get a decision within the new federal 72-hour window.
- The CMS Interoperability & Prior Authorization Final Rule now requires most payers to issue PA decisions within 72 hours for expedited requests and 7 days for standard requests beginning January 1, 2026. (cms.gov)
- Obesity diagnosis codes E66.01 (morbid obesity) and E66.09 (other obesity) are the two most commonly accepted codes for Wegovy or Zepbound coverage. (icdlist.com)
- BMI codes Z68.35 – Z68.45 document the exact BMI range; payers usually require Z68.35+ (≥35 kg/m²) or Z68.4x (≥40 kg/m²). (icdlist.com)
- CVS Caremark, OptumRx, and Express Scripts all mandate documentation of a 6-month lifestyle program and at least one failed anti-obesity medication before approving GLP-1s for weight loss. (caremark.com)
- Submitting the PA through the insurer’s e-portal with chart notes, baseline labs, and weight logs attached cuts average turnaround to 48 hours, according to 2025 AMA survey data. (ama-assn.org)
What a Wegovy or Zepbound Prior Authorization Is
Payers require prior authorization to confirm that Wegovy or Zepbound is medically necessary and fits plan criteria before they cover the prescription. The doctor (or their delegate) completes a form, attaches documentation, and submits it through fax or an electronic portal. Approval unlocks coverage; denial means the prescriber must appeal or the patient pays cash.
Why it exists: GLP-1s cost over $1,000 per month on average, so insurers gate access to control spending and ensure use aligns with FDA-labeled indications.
Exact 2026 ICD-10 & BMI Codes Your PA Must Include
PA software typically rejects any request without both an obesity diagnosis code and a BMI Z-code. Use the pair that matches the patient’s charted BMI on the date of request.
| Diagnosis | ICD-10-CM Code (2026) | When to Use |
|---|---|---|
| Morbid (severe) obesity due to excess calories | E66.01 | BMI ≥40 kg/m² or ≥35 kg/m² with comorbidity |
| Other obesity due to excess calories | E66.09 | BMI 30–39.9 kg/m² without comorbidity |
| Overweight | E66.3 | BMI 25–29.9 kg/m² (rarely approved) |
| Adult BMI Range | ICD-10 Z-Code | Eligible for PA? |
|---|---|---|
| 35.0 – 35.9 kg/m² | Z68.35 | Yes, if ≥1 comorbidity |
| 40.0 – 44.9 kg/m² | Z68.41 | Always yes |
| 45.0 – 49.9 kg/m² | Z68.42 | Always yes |
| 50.0 – 59.9 kg/m² | Z68.43 | Always yes |
Tip: Insurers audit BMI codes against the weight & height in the chart. A mismatch is the #1 cause of technical denial.
2026 BMI & Comorbidity Rules by Major Insurers
Each pharmacy benefit manager (PBM) layers its own clinical criteria on top of FDA labeling.
| PBM | Minimum BMI Rule | Comorbidity Requirement | Look-Back on Lifestyle Program |
|---|---|---|---|
| CVS Caremark | BMI ≥35 or ≥30 with one risk factor | Dyslipidemia, hypertension, OSA, T2D, etc. | ≥6 months diet + exercise documented (caremark.com) |
| OptumRx | BMI ≥30 with risk factor; ≥27 for OSA add-on | Must list specific comorbidity and failed therapy | ≥6 months plus at least one failed anti-obesity drug (contenthub-aem.optumrx.com) |
| Express Scripts | BMI ≥35 without comorbidity, ≥30 with one | Same as above | ≥6 months lifestyle and medication trial (express-scripts.com) |
⚠️ Pediatric patients
Most commercial plans still exclude Wegovy or Zepbound for children unless the plan specifically covers pediatric obesity. Check plan documents before filing.
Documents You Need Before Filing
The PA reviewer is looking for proof that Wegovy or Zepbound is medically necessary and compliant with policy. Gather these before you open the form:
Baseline weight & height: Charted within the last 90 days.
Failed therapies: Progress notes showing at least 12 weeks of Saxenda, Contrave*, orlistat, or phentermine at maximal tolerated dose. (*Contrave currently has no Rx.com drug page.)
Lifestyle records: Dietitian notes, program receipts, or SMART-goal logs covering six months.
Comorbidity labs: HbA1c, fasting lipids, blood pressure logs, or sleep study summary if filing under OSA criteria.
Medication contraindication list: Show why older drugs (e.g., orlistat GI side effects) were stopped if not tolerated.
Want an expert to handle the paperwork?
Rx.com weight-loss providers compile every note, lab, and code, then submit the PA on your behalf.
How to Cut Turnaround Time to <72 Hours
File electronically: Every major PBM now offers an E-PA portal that routes directly to the reviewer, trimming 1–2 days of fax batching.
Attach everything up front: AMA survey data show “missing information” triggers 88% of additional documentation requests, extending decisions by a median 5 days. (ama-assn.org)
Mark as expedited when clinically justified: Under the CMS rule, PBMs must decide urgent requests within 72 hours. Attach a brief clinical rationale (e.g., uncontrolled T2D or severe OSA) and mark the expedited checkbox. (cms.gov)
Use chart macros: Create an EHR template that autopopulates ICD-10, BMI, comorbidities, and prior therapies.
Follow up at 48 hours: If no status appears in the portal after two days, call the PA line with the reference number to nudge the queue.
Ready to file your own PA?
Check the column that fits your situation:
✅ I’ve Got This Covered
- BMI & diagnosis codes match today’s vitals
- Six-month lifestyle program documented
- Failed anti-obesity med noted with dates
- Labs and comorbidity evidence attached
- Access to insurer’s electronic PA portal
🏥 I Need Professional Help
- Unsure which ICD-10 or BMI code to use
- Missing weight or program documentation
- Previous PA was denied for “insufficient data”
- No portal access or EHR integration
- Time-sensitive comorbidity risk (e.g., uncontrolled T2D)
Insurer-Specific Forms & Upload Links
Use the latest 2026 versions-older PDFs can trigger auto-denial.
| PBM | GLP-1 Weight-Loss PA Form | Upload Portal |
|---|---|---|
| CVS Caremark | Global Prior Authorization Form | Caremark ePA Portal (SureScripts) |
| OptumRx | GLP-1 Combination Agents PA | OptumRx CoverMyMeds |
| Express Scripts | Coverage Review Request | Express Scripts ePA (CoverMyMeds) |
How Rx.com Telehealth Handles PAs for You
When you start weight-loss care through Rx.com, your provider not only determines if Wegovy or Zepbound is right for you-they also complete the entire prior authorization:
EHR-integrated coding: The platform auto-generates the correct E66 and Z68 codes directly from your vitals.
Instant form fill: Our clinical team uploads the CVS, Optum, or Express Scripts PDF, attaches labs, and submits electronically the same day.
Real-time tracking: You receive SMS updates as the PA moves from “submitted” to “approved.”
Price peace of mind: If the PA is denied, we instantly quote cash prices and free Rx discount card options-no surprises.
Average approval time for Rx.com-filed GLP-1 PAs in 2025 was 46 hours, well under the 72-hour federal target.
🚨 When to Contact Your Healthcare Provider
Seek medical attention right away if you experience any of the following while taking a GLP-1:
- Severe abdominal pain - could signal pancreatitis
- Persistent nausea or vomiting - risk of dehydration
- Difficulty swallowing or neck swelling - possible thyroid issue
- Rapid heartbeat or dizziness - may indicate hypoglycemia
- Signs of allergic reaction - rash, itching, trouble breathing
- Thoughts of self-harm - call or text 988 immediately
Scientific References
- Centers for Medicare & Medicaid Services. CMS-0057-F Interoperability & Prior Authorization Final Rule. 2024.
- Eli Lilly and Company. Zepbound (tirzepatide) Prescribing Information. FDA DailyMed, 2026.
- Novo Nordisk. Wegovy (semaglutide) Prescribing Information. FDA DailyMed, 2026.
- ICDList.com. ICD-10-CM Code E66.01 Morbid Obesity Due to Excess Calories. 2026.
- ICDList.com. ICD-10-CM Codes Z68.35–Z68.45 Body Mass Index (BMI) ≥35 kg/m². 2026.
- American Medical Association. Advocacy in Action: Fixing Prior Authorization. 2025.
- CVS Caremark. Global Prior Authorization Form (Antiobesity Criteria). 2026.
- OptumRx. Interim GLP-1 Combination Agents Prior Authorization Criteria. 2025.
- Express Scripts. Prior Authorization FAQ. 2026.
Frequently Asked Questions
What ICD-10 code should I use if my BMI is 37 kg/m²?
Use Z68.37 for the BMI and pair it with E66.01 or E66.09 depending on comorbidities. Most plans approve GLP-1s at this BMI if at least one weight-related condition is documented.
Can I bypass the 6-month lifestyle requirement?
Rarely. Some plans waive the requirement for urgent cardiovascular risk, but you must submit clinical evidence and request expedited review.
Does Medicare Part D cover Wegovy or Zepbound for obesity?
Traditional Medicare still excludes weight-loss drugs, but many Medicare Advantage plans follow commercial PA criteria. Check the plan’s formulary first.
How long is a PA approval valid?
Typically 12 months for Wegovy or Zepbound. Renewals require updated weight and adherence data.
Will switching from Ozempic to Wegovy restart the PA clock?
Yes. Because Ozempic is labeled for diabetes, insurers process Wegovy as a new weight-loss request with its own criteria.
What if the PA is denied?
You can appeal with additional documentation or explore cash prices through Rx.com’s price-comparison tool and discount card.
Can Rx.com transfer my approved PA to a local pharmacy?
Yes. Once approved, your Rx.com provider can send the prescription to any of the 60,000+ US pharmacies in our network or ship it to your door.
Ready to Get Wegovy or Zepbound Approved?
Let Rx.com’s weight-loss team handle the coding, paperwork, and follow-ups while you focus on your health.
