How Much Does Prometrium Cost in Missouri in 2026?

Brand-Name Prometrium Pricing in Missouri

The sticker price and the price you actually pay are rarely the same number. AbbVie (successor to Solvay Pharmaceuticals, the original manufacturer) lists Prometrium at approximately $180 per month for a standard 200 mg, 30-capsule supply. Missouri retail pharmacies charge far less at the counter. Average cash-pay prices across the state land near $45 per month in 2026, a figure that tracks national discount-card pricing trends.

Prices vary by pharmacy. A Walgreens in St. Louis and an independent pharmacy in Springfield may quote different amounts for the same 30-capsule fill. The spread in Missouri typically ranges from $35 to $65 depending on the specific chain, location, and whether the pharmacy participates in a discount network. Costco and Walmart pharmacies in Missouri tend to cluster at the low end of that range, while specialty or low-volume independents sometimes run higher.

Prometrium is FDA-approved micronized progesterone in peanut oil [1]. Its approval for endometrial protection in postmenopausal women on estrogen therapy dates to 1998, and the labeling references the PEPI trial (N=875), which demonstrated that micronized progesterone protected the endometrium from estrogen-driven hyperplasia while producing a more favorable lipid profile than medroxyprogesterone acetate [2]. That clinical distinction matters for cost discussions because it is the reason many prescribers specifically request micronized progesterone rather than a synthetic progestin, even when the synthetic option may be cheaper.

The 2022 Endocrine Society clinical practice guideline on menopausal hormone therapy recommends micronized progesterone as the preferred progestogen for endometrial protection in women with an intact uterus receiving systemic estrogen [3]. This recommendation drives demand and, by extension, pricing power for the branded product.

Missouri Medicaid and Prometrium Coverage

Missouri Medicaid (MO HealthNet) does not cover Prometrium for standard HRT endometrial protection as of 2026. The state's preferred drug list restricts progesterone coverage to specific clinical indications, and routine menopause-related hormone therapy falls outside current formulary inclusion.

This gap is not unique to Missouri. Many state Medicaid programs treat HRT coverage narrowly, listing progesterone only for pregnancy support or certain endocrine diagnoses. For Missouri MO HealthNet enrollees who need endometrial protection on estrogen, the practical options include requesting a prior authorization (which may be denied), switching to a covered synthetic progestin such as medroxyprogesterone acetate, or paying cash for Prometrium or a compounded micronized progesterone product.

A prior authorization request requires documentation from the prescribing clinician explaining medical necessity. According to the American College of Obstetricians and Gynecologists (ACOG), micronized progesterone is associated with a lower risk of venous thromboembolism compared with synthetic progestins, a distinction that may support prior authorization appeals for patients with clotting risk factors [4]. However, approval is not guaranteed, and the timeline for a Missouri Medicaid PA decision can stretch to 72 hours for standard requests.

Compounded Micronized Progesterone in Missouri

Compounded micronized progesterone is legal and available in Missouri through licensed 503A compounding pharmacies. These pharmacies operate under state Board of Pharmacy oversight and federal guidelines established by the Drug Quality and Security Act of 2013. A 503A pharmacy compounds medications based on individual patient prescriptions, which distinguishes it from 503B outsourcing facilities that produce larger batches without patient-specific prescriptions [5].

Missouri patients can expect to pay roughly $25 per month for compounded micronized progesterone capsules, a meaningful savings compared with the $45 cash-pay average for branded Prometrium. The trade-off is real. Compounded products do not undergo FDA review for safety, efficacy, or manufacturing consistency. The FDA has repeatedly noted that compounded hormones are not FDA-approved and may vary in potency from batch to batch [6].

Dr. JoAnn V. Pinkerton, former executive director of the North American Menopause Society, has stated: "FDA-approved hormone therapies have known risks and benefits. Compounded hormones have the same risks but without the same evidence of efficacy or safety testing." That caution applies directly to the cost-versus-certainty calculation Missouri patients face when choosing between brand Prometrium and a compounded alternative.

Several 503A compounding pharmacies operate in the Kansas City and St. Louis metro areas, with additional options in Columbia and Springfield. Patients in rural Missouri may need to use mail-order compounding services, which are permitted as long as the pharmacy holds appropriate Missouri licensure.

Commercial Insurance Coverage Across Missouri Plans

Most major commercial insurers in Missouri cover generic micronized progesterone capsules at Tier 1 or Tier 2 copay levels. Brand Prometrium, when specifically prescribed, typically lands on Tier 3 (preferred brand) or requires a formulary exception if the plan mandates generic substitution.

Missouri's largest commercial insurers include Anthem Blue Cross Blue Shield, Cigna, Aetna, UnitedHealthcare, and Blue Cross Blue Shield of Kansas City (Blue KC). Coverage specifics vary by plan type (HMO, PPO, high-deductible), employer group, and plan year. Generic micronized progesterone copays in Missouri commercial plans generally range from $5 to $20 for a 30-day supply. Brand Prometrium copays, when covered at Tier 3, typically run $35 to $75.

The Affordable Care Act requires coverage of FDA-approved contraceptive methods without cost-sharing, but progesterone prescribed for HRT endometrial protection does not fall under the contraceptive mandate. This means standard cost-sharing rules apply, and the specific copay depends entirely on the plan's pharmacy benefit design.

Patients enrolled in Missouri Marketplace (ACA exchange) plans through healthcare.gov should check their Summary of Benefits and Coverage document or call the plan's pharmacy line with the NDC number for micronized progesterone to get an exact out-of-pocket quote before filling.

AbbVie Savings Card and Discount Programs

AbbVie offers a manufacturer savings card for brand Prometrium that can reduce out-of-pocket costs for commercially insured patients. The card is not available to patients covered by Medicare, Medicaid, TRICARE, or other government-funded programs. Typical savings card terms cap the annual benefit and set a per-fill maximum reduction, so commercially insured patients in Missouri should verify the current terms directly with AbbVie's patient support program before relying on projected savings.

Beyond the manufacturer card, several pharmacy discount platforms operate in Missouri. GoodRx, RxSaver, and SingleCare all list cash-pay discount prices for micronized progesterone at Missouri pharmacies. These platforms negotiate rates independently with pharmacy chains, so the "best price" pharmacy may differ depending on which platform a patient uses.

A practical approach for Missouri patients: check at least two discount platforms, compare against the compounding price, and then verify insurance copay amounts. The lowest-cost option depends on the individual's coverage status, which pharmacy they use, and whether they specifically need brand Prometrium or are willing to use generic micronized progesterone.

The PEPI trial findings remain the foundational evidence supporting micronized progesterone's role in HRT. In that study, women receiving conjugated equine estrogen plus micronized progesterone (200 mg for 12 days per cycle) maintained endometrial protection comparable to the medroxyprogesterone acetate arm while showing significantly better effects on HDL cholesterol [2]. The Women's Health Initiative, which used medroxyprogesterone acetate rather than micronized progesterone, reported increased cardiovascular and breast cancer risk in its estrogen-plus-progestin arm (N=16,608) [7]. Observational data from the French E3N cohort (N=80,377) suggested that micronized progesterone combined with transdermal estradiol did not increase breast cancer risk over a mean follow-up of 8.1 years, a finding that has influenced clinical preference toward micronized progesterone [8].

These clinical distinctions explain why a prescriber might insist on micronized progesterone even when the cost is higher than a synthetic alternative. Missouri patients should discuss both the clinical and financial dimensions of this choice with their provider.

Telehealth Access for Prometrium in Missouri

Missouri permits telehealth prescribing of Prometrium and other hormone therapy medications. The state enacted telehealth parity legislation (Missouri Revised Statutes §191.1145 and §376.1900) that requires insurers to cover telehealth services at the same rate as in-person visits. This means a Missouri patient can receive a progesterone prescription through a video or audio visit with a licensed provider and have it filled at any Missouri pharmacy.

Several national telehealth platforms now prescribe HRT, including micronized progesterone, to Missouri residents. HealthRX offers telehealth hormone therapy consultations for Missouri patients, providing a streamlined path from evaluation to prescription. The consultation includes a review of symptoms, medical history, and relevant lab work, followed by a prescription sent directly to the patient's pharmacy of choice.

Telehealth is particularly relevant for Missouri patients in rural areas where access to menopause-specialized providers may be limited. The state has 114 counties, and provider density drops significantly outside the Kansas City, St. Louis, Columbia, and Springfield metro areas. A 2023 ACOG workforce analysis noted that nearly half of U.S. counties have no OB-GYN, and Missouri's rural counties reflect that trend [9].

How to Get the Lowest Price

The cost optimization path depends on insurance status. For uninsured or high-deductible patients, generic micronized progesterone with a discount card at Costco or Walmart typically yields the lowest per-fill cost among retail options. Compounded micronized progesterone from a Missouri-licensed 503A pharmacy may undercut even that, though patients accept the trade-off of a non-FDA-approved product.

For commercially insured patients, the generic copay is usually the best deal. If a plan covers brand Prometrium at Tier 3, the AbbVie savings card may reduce the out-of-pocket amount below the discount-card cash price, making the branded product the better financial choice in that specific scenario.

Medicare Part D enrollees face the most constrained options. Manufacturer savings cards are excluded. Generic micronized progesterone is listed on most Part D formularies, typically at Tier 2. Patients in the coverage gap (donut hole) will pay 25% coinsurance on the negotiated price, which for generic micronized progesterone is generally modest.

Missouri patients filling at a 90-day supply through mail-order pharmacies, including Express Scripts (headquartered in St. Louis), may achieve an additional 10 to 20 percent cost reduction compared with 30-day retail fills.

The FDA-approved labeling for Prometrium specifies 200 mg daily for 12 sequential days per 28-day cycle for endometrial protection in postmenopausal women on conjugated estrogens 0.625 mg daily [1]. Continuous dosing (100 mg nightly, every day) is used off-label but widely practiced. Continuous dosing eliminates cyclic withdrawal bleeding and may improve adherence, though it requires a slightly different cost calculation because the patient fills every month rather than using a partial-month cyclic supply.