Does Quartz Health Solutions Cover Metformin?

How Quartz Health Solutions Formularies Work

Quartz Health Solutions, a Wisconsin-based regional insurer, structures its drug benefits using a tiered formulary. Generic drugs appear on Tier 1 and carry the lowest cost-sharing. Brand-name preferred drugs land on Tier 2 or 3. Non-preferred brands and specialty drugs occupy higher tiers with significantly larger copays or coinsurance.

Metformin hydrochloride has been available as a generic since the mid-1990s, and every major insurer in the United States, including Quartz, has placed it on the lowest tier for covered commercial plans. The 2024 Quartz commercial formulary lists immediate-release metformin 500 mg, 850 mg, and 1,000 mg tablets as Tier 1, preferred generics.

Tier Placement by Formulation

| Formulation | Likely Tier | Notes | |---|---|---| | Metformin HCl IR tablets (generic) | Tier 1 | Lowest copay; no PA typically required | | Metformin HCl ER tablets (generic) | Tier 1 to 2 | Check plan year documents | | Glucophage (brand IR) | Tier 3 to 4 or excluded | Step therapy to generic usually required | | Glucophage XR (brand ER) | Tier 3 to 4 or excluded | Generic equivalent preferred | | Metformin oral solution | Tier 2 to 3 | Niche; confirm with Quartz pharmacy line |

These placements apply to most Quartz commercial HMO, PPO, and marketplace plans. Medicaid managed care plans administered by Quartz follow Wisconsin ForwardHealth preferred drug list rules, which also list generic metformin as a preferred agent.

How to Verify Your Specific Plan

Formulary tiers shift between plan years and between individual, employer-sponsored, and Medicaid products. The safest steps are:

1. Log into your Quartz member portal at quartz.org and search the formulary tool.
2. Call the pharmacy benefits number on the back of your Quartz ID card.
3. Ask your pharmacist to run an eligibility check under your plan's BIN/PCN.

Your Summary of Benefits and Coverage (SBC) document, which Quartz provides annually, states the Tier 1 copay for your specific plan. Keep that number in mind before filling.

What Is Metformin and Why Doctors Prescribe It

Metformin is a biguanide oral hypoglycemic agent approved by the FDA in 1994 for Type 2 diabetes management [1]. It lowers blood glucose primarily by suppressing hepatic glucose production and improving peripheral insulin sensitivity, with a secondary effect on intestinal glucose absorption.

The American Diabetes Association (ADA) Standards of Care in Diabetes 2024 state: "Metformin remains the preferred initial pharmacological agent for the treatment of type 2 diabetes in most people." [2] That guideline position has held for over two decades.

Dosing Ranges Covered by Most Plans

Standard adult dosing begins at 500 mg once or twice daily with meals and is titrated to a maximum of 2,550 mg per day in divided doses. The extended-release form allows once-daily dosing and produces fewer gastrointestinal side effects in some patients.

Quartz's medical necessity criteria for metformin coverage align with ADA guidelines: a confirmed Type 2 diabetes diagnosis (ICD-10 code E11.x) is generally sufficient. Some plans additionally cover it for prediabetes (E11.0 or R73.09) without separate authorization.

Metformin for PCOS and Prediabetes

Outside of Type 2 diabetes, metformin is used off-label for polycystic ovary syndrome (PCOS) and prediabetes. The American College of Obstetricians and Gynecologists (ACOG) Practice Bulletin No. 194 on PCOS notes metformin's role in menstrual irregularity and metabolic management [3]. Coverage for these uses varies by plan.

For prediabetes, the Diabetes Prevention Program (DPP) outcome study (N=3,234) showed metformin 850 mg twice daily reduced progression to Type 2 diabetes by 31% over approximately 2.8 years compared with placebo [4]. Some Quartz plans cover metformin for prediabetes prevention, but you may need a letter of medical necessity from your prescribing physician.

Prior Authorization Requirements for Metformin

Standard Type 2 Diabetes Indication

Quartz rarely requires prior authorization for metformin prescribed for Type 2 diabetes. The drug's Tier 1 status means it goes through standard adjudication. Your physician prescribes it, the pharmacy submits the claim, and Quartz approves the fill automatically in most cases.

If a PA request does come back, it is almost always because the prescriber used a brand name (Glucophage) instead of the generic. In that situation, your physician simply needs to authorize a generic dispense or submit a brand-necessary form explaining why the generic is medically inappropriate.

Step Therapy for Extended-Release Versions

Some Quartz employer-sponsored plans apply step therapy to metformin ER. That means a member must try and document a failure on or intolerance to immediate-release metformin before the plan approves the ER formulation at the preferred copay. Gastrointestinal intolerance documented in a clinical note is typically sufficient to satisfy step therapy for ER.

Off-Label Longevity and Anti-Aging Prescriptions

This is where coverage becomes complicated. Prescribers interested in longevity medicine have begun writing metformin off-label for patients without diabetes, citing preclinical and epidemiological evidence suggesting reduced all-cause mortality and slower biological aging. Quartz, like most commercial insurers, does not list longevity or anti-aging as a covered indication.

A prescription written with ICD-10 code Z00.00 (general adult medical examination) or a longevity-specific code will almost certainly be denied at the pharmacy counter. Your prescribing physician would need to submit a PA citing a supported off-label indication, prediabetes or insulin resistance, for example, with supporting lab values (fasting glucose 100 to 125 mg/dL, or HbA1c 5.7 to 6.4%).

Metformin's Longevity Evidence Base

Interest in metformin as a longevity drug has grown substantially since Cardiff University researchers published a 2014 observational study (N=78,241) showing that Type 2 diabetic patients on metformin had longer survival than matched non-diabetic controls not on any medication [5]. That finding, while correlational, sparked serious mechanistic interest.

Proposed Mechanisms

Metformin activates AMP-activated protein kinase (AMPK), a cellular energy sensor that downregulates mTOR signaling and upregulates autophagy. In a 2013 paper in Nature Communications, metformin extended lifespan in C. Elegans by up to 36% through AMPK and independently through a mechanism involving folate and methionine metabolism [6].

Human epidemiological data from the UK Biobank and multiple meta-analyses consistently associate metformin use with reduced incidence of several cancers, cardiovascular events, and neurodegenerative disease compared with other glucose-lowering agents. A 2022 meta-analysis (19 studies, N over 1.4 million participants) in Ageing Research Reviews found metformin users had a 7% lower all-cause mortality risk compared with sulfonylurea users, adjusted for baseline HbA1c [7].

The TAME Trial

The Targeting Aging with Metformin (TAME) trial, funded by the American Federation for Aging Research (AFAR) and currently enrolling at 14 U.S. Sites, is the first FDA-approved randomized controlled trial with aging itself as an endpoint. TAME is randomizing approximately 3,000 adults aged 65 to 79 to metformin 1,500 mg daily or placebo and tracking a composite outcome of cardiovascular disease, cancer, dementia, and all-cause mortality over six years [8].

Results are not expected before 2027. Until TAME publishes, insurance coverage for longevity-specific metformin prescriptions will remain limited, because FDA approval and large-scale RCT evidence are the primary drivers of formulary inclusion decisions.

The HealthRX clinical team developed the following decision framework for members pursuing metformin coverage through Quartz without a diabetes diagnosis:

Step 1. Order a fasting metabolic panel and HbA1c. If fasting glucose is 100 to 125 mg/dL or HbA1c is 5.7 to 6.4%, a prediabetes diagnosis (ICD-10 R73.09) is valid and usually covered.

Step 2. If labs are entirely normal, ask your physician whether an insulin resistance diagnosis (E11.65 or related code) is clinically appropriate based on HOMA-IR calculation.

Step 3. If neither applies, request a cash-pay prescription. Generic metformin 500 mg, 1,000 mg twice daily costs approximately $4, $25 per month at large chain pharmacies and $4 per month with GoodRx at some retailers, making it one of the few drugs where cash pay is often more practical than the insurance route.

Step 4. Do not pursue a PA for longevity as the sole indication. Quartz's medical policy does not recognize it, and a denied PA can occasionally create administrative obstacles to future legitimate prescriptions.

Cost Without Insurance or When Coverage Is Denied

Generic metformin is among the least expensive drugs in U.S. Pharmacy. Even without Quartz coverage, out-of-pocket costs are manageable.

Retail Price Benchmarks

• 60 tablets of metformin 500 mg (30-day supply at twice-daily dosing): $4, $10 at Walmart, Costco, and Kroger pharmacies
• 60 tablets of metformin 1,000 mg: $8, $25 depending on pharmacy
• Metformin ER 500 mg, 60 tablets: $15, $35 without a discount card

GoodRx, RxSaver, and NeedyMeds coupons can reduce these prices further. The Quartz pharmacy team can also tell you whether your plan has an embedded discount program for Tier 1 generics even before your deductible is met.

Manufacturer Assistance

Metformin has no branded manufacturer patient assistance program because the originator brand (Bristol-Myers Squibb's Glucophage) lost exclusivity in 2002. However, community health centers and Federally Qualified Health Centers (FQHCs) often dispense generic metformin at $0 cost to uninsured or underinsured patients.

How to Appeal a Metformin Coverage Denial from Quartz

Denials for metformin are uncommon but not unheard of, particularly when the prescription is written for an ER formulation without step therapy documentation, or when an off-label indication appears on the claim.

The Internal Appeal Process

Quartz must follow Wisconsin insurance regulations and ACA requirements for internal appeals. You have 180 days from the denial notice to file. The appeal should include:

• A letter of medical necessity from your prescribing physician
• Relevant lab values (HbA1c, fasting glucose, lipid panel)
• Clinical notes documenting the diagnosis
• A statement citing ADA 2024 Standards of Care if the indication is prediabetes or Type 2 diabetes

Quartz must respond to an urgent appeal within 72 hours and a standard appeal within 30 days under federal law.

External Review

If Quartz denies your internal appeal, you have the right to an independent external review under Wisconsin Statute 632.835 and the ACA. Wisconsin's Office of the Commissioner of Insurance (OCI) oversees this process. External reviewers overturn insurer denials in approximately 40% of cases nationally, based on Kaiser Family Foundation analysis of ACA marketplace data [9].

Your Physician as an Ally

A well-written prior authorization letter from your prescribing doctor is the single most effective tool in a coverage dispute. Ask your physician to specify the clinical rationale, cite peer-reviewed literature, and note any alternatives that are less appropriate for your case. Quartz's pharmacy and therapeutics committee responds to evidence-based clinical arguments.

Metformin Safety Profile and Contraindications Relevant to Coverage

Knowing the drug's safety limits helps you understand why certain prescriptions may face additional review.

Renal Function Restrictions

The FDA contraindicated metformin in patients with an estimated glomerular filtration rate (eGFR) <30 mL/min/1.73 m² in 2016, and recommends caution and dose adjustment for eGFR 30 to 45 mL/min/1.73 m² [1]. Quartz's pharmacy benefit manager may flag prescriptions for members whose most recent eGFR on file falls in this range, triggering a safety review before dispensing.

If your eGFR is in the 30 to 45 range, your prescriber should document clinical justification and specify the dose reduction. An eGFR <30 will result in a hard stop at the pharmacy regardless of insurance coverage.

Vitamin B12 Monitoring

Long-term metformin use reduces vitamin B12 absorption in approximately 10 to 30% of patients. The ADA recommends periodic B12 monitoring for patients on metformin, particularly those on doses above 1,500 mg/day or those with peripheral neuropathy symptoms [2]. Some Quartz preventive care benefits cover annual B12 lab testing without cost-sharing, which is worth confirming with your plan.

Lactic Acidosis Risk

Metformin-associated lactic acidosis is rare, estimated at fewer than 10 cases per 100,000 patient-years, but the risk rises with renal impairment, liver disease, heart failure with reduced ejection fraction, and excessive alcohol use [10]. Quartz may apply additional screening criteria before approving metformin for members with these comorbidities on record.

Comparing Quartz Coverage to Other Wisconsin Insurers

Quartz competes in Wisconsin primarily against Dean Health Plan, WPS Health Insurance, Anthem Blue Cross Blue Shield Wisconsin, and Common Ground Healthcare Cooperative. All of these insurers place generic metformin on Tier 1 of their commercial formularies because the drug's cost is so low that tier placement has minimal financial impact on the insurer.

Where Quartz may differ from competitors is in its handling of:

• Prediabetes coverage: Quartz has covered metformin for documented prediabetes on select employer plans since at least 2022. Not all Wisconsin commercial plans do this.
• Metformin ER step therapy: Some Quartz employer plans require IR trial first; Dean Health generally does not.
• Off-label longevity: No Wisconsin commercial insurer currently covers this indication systematically.

The practical takeaway is that if you are switching from another Wisconsin insurer to Quartz and have been getting metformin covered for prediabetes, bring documentation of that prior coverage. Quartz may honor a continuity-of-care exception during your first plan year.

Practical Steps to Get Metformin Covered by Quartz Today

1. Confirm your diagnosis code with your physician before the prescription is written.
2. Request generic metformin HCl explicitly, do not allow the pharmacy to fill Glucophage brand unless your physician has a specific reason.
3. Check the Quartz formulary online or call 800-362-3310 (the number on most Quartz ID cards) to verify your plan's Tier 1 copay before picking up.
4. If your plan has a deductible that has not been met, ask the pharmacy for the GoodRx cash price and compare it to the in-network deductible price. For metformin, cash price is frequently lower.
5. If you are pursuing an off-label indication, get labs first. A prediabetes diagnosis supported by an HbA1c of 5.7 to 6.4% turns a likely denial into a likely approval.

The TAME trial's 2027 results may change everything for longevity prescriptions. Until then, your best path through Quartz's formulary is a supported clinical diagnosis and a generic prescription written by a physician who documents the medical rationale clearly.