How Much Does Prometrium Cost in California in 2026?

Retail Cash Prices Across California Pharmacies

The average out-of-pocket cost for a 30-day supply of brand-name Prometrium at California retail pharmacies sits near $45 in 2026 when patients use a discount card or coupon aggregator. That figure represents a sharp drop from the $180 manufacturer list price, and it varies by pharmacy chain, region, and capsule strength.

Pricing differences within the state can be substantial. A pharmacy in downtown Los Angeles may charge $55 for the same 100 mg, 30-capsule box that a Costco in Sacramento sells for $38. Independent pharmacies in rural Northern California tend to fall somewhere between those poles. Patients filling the higher 200 mg strength (the standard dose for endometrial protection during estrogen therapy) generally pay 15 to 25 percent more than those on 100 mg 1.

The PEPI trial (Postmenopausal Estrogen/Progestin Interventions, N=875) established that micronized progesterone at 200 mg for 12 days per cycle opposed endometrial hyperplasia as effectively as medroxyprogesterone acetate while producing a more favorable lipid profile 2. That finding underpins most current prescribing of Prometrium in HRT regimens and directly affects which strengths California patients fill most often.

Price-comparison apps such as GoodRx, RxSaver, and Amazon Pharmacy routinely show California-specific pricing. A patient's zip code matters because pharmacy benefit managers negotiate different acquisition costs across regions. Checking at least three pharmacies before filling is a practical first step.

Medi-Cal Coverage and Prior Authorization

Medi-Cal, California's Medicaid program, covers Prometrium. The catch: prior authorization is required. That means the prescribing clinician must submit documentation confirming the clinical indication before the pharmacy can dispense the drug at the Medi-Cal rate.

For most women on estrogen replacement therapy, the PA process is straightforward. The clinician documents the HRT regimen, confirms the need for endometrial protection, and submits through the Medi-Cal Rx portal. Turnaround typically runs 24 to 72 hours, though urgent requests can be expedited same-day 3. The California Department of Health Care Services publishes its preferred drug list quarterly, and micronized progesterone has remained on it since 2019.

Medi-Cal expansion under the Affordable Care Act extended coverage to adults up to 138% of the federal poverty level, which means a significant share of California women in perimenopause or postmenopause qualify. As of January 2024, more than 15.4 million Californians were enrolled in Medi-Cal 4. Patients already enrolled should confirm that their managed care plan (e.g., LA Care, Health Net, Molina) lists Prometrium on its formulary tier, because co-pay amounts differ by plan.

Generic micronized progesterone capsules are also available and may be substituted at the pharmacy level unless the prescriber writes "DAW" (dispense as written). For Medi-Cal beneficiaries, the generic often carries a $0 to $1 co-pay.

Compounded Micronized Progesterone in California

Compounded micronized progesterone is legal in California through 503A-licensed compounding pharmacies. The California State Board of Pharmacy oversees these facilities, and they must comply with both state and federal compounding standards under section 503A of the Federal Food, Drug, and Cosmetic Act 5.

A typical 30-day supply of compounded micronized progesterone costs roughly $25, making it the lowest-cost option for California patients. Compounding pharmacies can formulate the drug in capsules, troches, sublingual tablets, topical creams, or vaginal suppositories. That flexibility is clinically relevant for patients who cannot tolerate oral dosing due to hepatic first-pass effects or who experience drowsiness from oral micronized progesterone at bedtime.

The distinction between 503A (patient-specific prescriptions) and 503B (outsourcing facilities producing larger batches) matters. In California, 503A pharmacies compound on a per-patient basis with a valid prescription. 503B facilities operate under stricter FDA oversight and can distribute without patient-specific prescriptions, which some telehealth platforms and clinics use for fulfillment 5.

Patients considering compounded progesterone should verify that the pharmacy holds a current California Board of Pharmacy license and ask whether the pharmacy participates in voluntary accreditation through PCAB (Pharmacy Compounding Accreditation Board). Accreditation is not legally required in California, but it signals adherence to USP 795 and USP 797 standards for non-sterile and sterile compounding, respectively.

Insurance Coverage Beyond Medi-Cal

Most commercial insurance plans in California cover micronized progesterone. Covered California (the state ACA marketplace) plans from carriers like Blue Shield, Kaiser Permanente, Anthem, and Health Net list generic micronized progesterone on Tier 1 or Tier 2 formularies, translating to co-pays between $5 and $25 per month.

Brand-name Prometrium often sits on a higher formulary tier (Tier 2 or Tier 3), which can mean co-pays of $30 to $60. Step therapy requirements may apply: some plans require a trial of generic micronized progesterone before covering the brand 6. The Endocrine Society's 2015 clinical practice guideline on hormone therapy in postmenopausal women recommended micronized progesterone as a preferred progestogen, citing its neutral-to-beneficial cardiovascular profile compared to synthetic progestins 7.

Kaiser Permanente, which operates as both insurer and provider across much of California, stocks generic micronized progesterone in its in-house pharmacies. Kaiser members typically pay $10 to $15 per 30-day fill. Patients with employer-sponsored PPO or HMO plans should check their plan's formulary search tool or call the number on the back of their insurance card to confirm tier placement.

For patients with high-deductible health plans (HDHPs), the out-of-pocket cost before meeting the deductible mirrors cash pricing. Using a manufacturer coupon or discount card alongside an HDHP may lower the effective price, though the amount paid with a coupon generally does not count toward the deductible.

The AbbVie Savings Card

AbbVie (which acquired the Prometrium brand through its Allergan acquisition) offers a savings card for commercially insured patients. The card typically reduces co-pays on brand-name Prometrium to as low as $25 per fill, depending on the patient's existing insurance co-pay structure.

Key eligibility rules apply. The card is not valid for patients enrolled in Medicare, Medicaid (including Medi-Cal), Tricare, or any other federal or state-funded healthcare program 1. California residents with commercial insurance can activate the card online or receive it from their prescribing clinician. The savings card has an annual maximum benefit (usually $1,200 to $1,800 per year, depending on the current program terms), and it resets each January.

Patients without insurance do not qualify for the savings card but may be eligible for AbbVie's patient assistance program, which provides brand-name Prometrium at no cost to patients below certain income thresholds. The income cutoff is typically 400% of the federal poverty level.

Telehealth Prescribing in California

California permits telehealth prescribing of Prometrium and generic micronized progesterone. The state's telehealth parity laws, updated through AB 32 and SB 510, require insurers to cover telehealth visits at the same rate as in-person visits 8.

For HRT patients, a telehealth consultation typically includes a review of symptoms, medical history, and recent lab work (FSH, estradiol, and lipid panel). The clinician can electronically prescribe Prometrium to any California pharmacy, including compounding pharmacies that accept e-prescriptions.

HealthRX and similar telehealth platforms operating in California can prescribe micronized progesterone as part of a comprehensive HRT protocol. The workflow is simple. A patient completes a medical intake, uploads relevant labs, consults with a licensed prescriber via video or asynchronous messaging, and receives a prescription sent directly to their preferred pharmacy. Monthly follow-ups or quarterly check-ins are standard depending on the stage of therapy.

The Medical Board of California requires that the prescribing clinician hold an active California license. Out-of-state physicians cannot prescribe to California patients unless they also hold a California license or qualify under a specific interstate compact.

Generic vs. Brand: Clinical Equivalence

The FDA-approved generic versions of Prometrium contain the same active ingredient (micronized progesterone derived from plant sources, typically wild yam or soy) in the same dosage forms (100 mg and 200 mg oral capsules) 1. Bioequivalence testing confirms that generics deliver the same blood levels of progesterone within the 80 to 125 percent confidence interval required by FDA standards.

Some patients report subjective differences between brand and generic, often related to the peanut oil base used in the original Prometrium formulation. Generic manufacturers may use different inactive ingredients, including sunflower oil or other carriers. Patients with peanut allergies should confirm the inactive ingredient list for any micronized progesterone product before filling.

The American College of Obstetricians and Gynecologists (ACOG) does not distinguish between brand and generic micronized progesterone in its clinical recommendations for endometrial protection during estrogen therapy 9. Either formulation, dosed at 200 mg orally for 12 to 14 days per month (cyclic) or 100 mg daily (continuous), achieves the goal of opposing estrogen-driven endometrial proliferation.

How to Minimize Your Cost in California

The lowest-cost path depends on insurance status.

Medi-Cal patients: Request that your clinician initiate the PA process. Once approved, expect a $0 to $1 co-pay for generic micronized progesterone. The PA renewal is annual.

Commercially insured patients: Check your plan's formulary online. If generic micronized progesterone is Tier 1, your co-pay will likely be $5 to $25. If you prefer brand Prometrium, ask your clinician for the AbbVie savings card to reduce the co-pay further.

Uninsured or underinsured patients: Compare cash prices using GoodRx or RxSaver across at least three pharmacies. Costco pharmacies (which do not require a membership for pharmacy services in California) often have the lowest retail prices. Alternatively, fill at a licensed 503A compounding pharmacy for approximately $25 per month.

High-deductible plan holders: Treat the prescription as a cash purchase until you meet your deductible. Use discount cards to lower the out-of-pocket amount, but remember that coupon-assisted purchases typically do not count toward your deductible.

Mail-order pharmacies may offer 90-day supplies at a lower per-unit cost. Many California insurers, including Covered California plans, provide mail-order options through Express Scripts, CVS Caremark, or OptumRx. A 90-day mail-order fill can save 15 to 30 percent compared to three separate 30-day retail fills 10.

Safety and Monitoring on Micronized Progesterone

The FDA label for Prometrium carries a boxed warning regarding the increased risk of cardiovascular events and breast cancer associated with combination estrogen-progestin therapy, based on data from the Women's Health Initiative (WHI) 11. The WHI primarily studied medroxyprogesterone acetate (MPA), not micronized progesterone. Observational data from the E3N French cohort (N=80,377) found that micronized progesterone combined with estrogen did not increase breast cancer risk over a mean follow-up of 8.1 years, while synthetic progestins did 12.

The Endocrine Society and ACOG recommend baseline and periodic monitoring for patients on HRT that includes progesterone. Standard labs include a lipid panel, fasting glucose, and liver function tests at baseline, with repeat testing at 6 to 12 months 7. Endometrial thickness monitoring via transvaginal ultrasound is indicated if breakthrough bleeding occurs after the first 6 months of therapy 9.

Common side effects of oral micronized progesterone include drowsiness, dizziness, and bloating. The drowsiness effect is well-documented and related to progesterone's metabolite allopregnanolone, which acts on GABA-A receptors 13. Taking the capsule at bedtime, as recommended on the FDA label, converts this side effect into a therapeutic benefit for patients with concurrent sleep difficulties.

Patients taking Prometrium at the 200 mg continuous dose should have annual clinical reassessment of the risk-benefit balance of continued HRT, per the 2022 North American Menopause Society position statement 14.