Allergy Shot Cost: What You'll Pay, the Schedule, and When They Start Working

Allergy shots are one of the few allergy treatments that change how your immune system reacts, rather than just covering the symptoms. They’re also a commitment of time and money, and it’s hard to find a straight answer about cost. Here’s what the public numbers show, what insurance covers, how the schedule works, and what to expect along the way.

What allergy shots cost

The AAAAI says only that cost varies with your region and insurance coverage (AAAAI), and there’s no reliable published price for a full course. The clearest public numbers come from Medicare’s own claims data. Here’s what Original Medicare allowed for office allergy services in Florida in 2024 (CMS):

Service	Average allowed amount, Florida, 2024
One allergy injection	About $9.86
Two or more injections at the same visit	About $11.81
Preparing the allergy extract, per dose	About $14.14
Skin prick test, per allergen	About $3.67

The allowed amount is the total for the service, including what Medicare pays and your share. With Original Medicare, you first meet the Part B deductible, which is $283 in 2026 (CMS), and then usually pay 20% of the cost of each covered service (Medicare.gov).

To put that in yearly terms, here’s our own rough estimate from those averages, not a published figure: one injection plus one dose of extract comes to about $24 allowed. At one shot a month, that’s about $288 a year (about $58 at 20%); at one shot every two weeks, about $624 (about $125 at 20%). Testing, visits and the deductible are extra. Private plans and Medicare Advantage plans set their own copays, so ask yours for the exact amount.

What drives the cost

Medicare’s billing rules explain where the money goes (CMS):

• Testing is billed per allergen tested, so the size of your panel matters.
• The extract is billed per dose, when your vial is prepared for you.
• The shots are billed per visit; a separate office visit is billed only when you’re also seen for something else.
• The schedule sets the total: weekly shots during build-up cost more per month than maintenance shots every two to four weeks, and treatment usually lasts 3 to 5 years.

There are hidden costs too. In a 2021 survey, adults getting allergy shots spent a median of 50 minutes per visit including travel (Tankersley et al., 2021), and in another study, 40% of patients who stopped shots early cited copays for the injections or the extract (Vaswani et al., 2015).

Does insurance cover allergy shots?

Medicare does. Part B covers a supply of allergy extract of up to 12 months, prepared for you by a physician who has examined you and set a treatment plan and dosing, and given under that plan (42 CFR 410.68; CMS). In Florida, the Medicare contractor, First Coast Service Options, also has a local coverage policy for allergen immunotherapy (LCD L37800) that sets its own requirements (CMS). One limit to know: Medicare covers allergy extract given by injection, but not drops placed under the tongue (CMS NCD 110.9).

Private plans usually do, with rules. Most health plans cover allergy testing and treatment (ACAAI), but they differ on referrals, prior approval and which parts of treatment they pay for. Call your plan before you start, and ask about your copay per shot and whether the extract is billed separately.

Are allergy shots worth the cost?

For the right patients, the evidence is strong. A federal review by the Agency for Healthcare Research and Quality found high-strength evidence that allergy shots reduce asthma symptoms, nasal and eye allergy symptoms, and the need for medicine (AHRQ). Benefits can outlast the treatment: in a New England Journal of Medicine study, people who stopped grass-pollen shots after 3 to 4 years did as well over the next 3 years as those who kept going (Durham et al., 1999).

There’s a Florida-specific cost study, too. Among Florida Medicaid patients, those who started allergy shots had 38% lower total health care costs over the next 18 months than similar patients who didn’t, an association rather than proof of cause (Hankin et al., 2013). The catch is sticking with it: in another study, only 16% of patients completed three years of shots (Hankin et al., 2008).

The schedule

Allergy shots come in two phases (AAAAI):

Phase	How often	How long
Build-up	Once or twice a week, with slowly increasing doses	About 4 to 6 months
Maintenance	Every 2 to 4 weeks	Usually 3 to 5 years

Faster options exist. A “cluster” schedule gives up to four shots per visit and shortens build-up by at least one to two months; a “rush” schedule gives up to seven shots in a visit and finishes build-up in weeks, with a higher risk of reactions. After each shot, the AAAAI strongly recommends waiting in the office for 30 minutes (AAAAI).

How long until allergy shots work

Not weeks. The AAAAI says some people improve during the build-up phase, while others may need up to 12 months on the maintenance dose; if there’s no improvement after a year of maintenance, it’s time to talk about other options (AAAAI). Lasting relief is most likely after three years or longer of treatment (AAAAI).

Missed shots

Consistency matters for safety, not just results. The NHLBI cautions that “missed appointments—and, consequently, missed treatments—can boost your odds of suffering an allergic reaction” (NHLBI). There’s no universal rule for how late is too late; after a long gap, offices usually repeat or lower the dose and build back up (practice parameter). Call before your next shot if you’ve missed one.

Reactions: what’s normal and when to worry

Local reactions are common. Redness and swelling where the shot went in can appear right away or several hours later (AAAAI), and most are smaller than the palm of your hand (practice parameter).

Whole-body reactions are less common, and serious ones are rare. The NHLBI estimates that reactions elsewhere in the body happen in about 12% of people who get allergy shots, while severe reactions are extremely rare, at most one in every 20,000 shots. That’s the reason for the 30-minute wait, though national surveillance found that about 15% of whole-body reactions start after 30 minutes (Epstein et al., 2019).

Know the emergency signs. Throat tightness or swelling, wheezing, trouble breathing, or feeling faint after a shot needs help right away. In MedlinePlus’s words, “If someone is having a serious allergic reaction, call 911. If an auto-injector is available, give the person the injection right away” (MedlinePlus).

Allergy shots and asthma

According to the NHLBI, “Allergy shots are recommended as an additional asthma treatment for those age 5 and older who have been proven to be allergic and whose asthma symptoms worsen after exposure to allergens such as pet dander, dust mites, or pollen.” But “Immunotherapy is not recommended if your asthma is severe,” and “If you have asthma, you should never give yourself allergy shots at home” (NHLBI). The national asthma guidelines add that your asthma should be controlled at each stage of treatment (NHLBI).

Alternatives: allergy tablets

The FDA has approved four tablets that dissolve under the tongue: three for grass or ragweed pollen and one for house dust mites (FDA). They’re taken daily at home after a first dose in the office with a 30-minute observation, and they carry a boxed warning about severe allergic reactions. Two caveats for South Florida: the grass tablets are made from northern grasses such as timothy, which differ from the Bahia and Bermuda grasses common here, and allergy drops (as opposed to the approved tablets) aren’t FDA-approved and aren’t covered by Medicare.

Allergy shots at Ambert

Ambert does skin prick testing and gives allergy shots at its Miami Lakes office, where a 30-minute wait after each shot is recommended. The office can check your coverage before you start. See allergy testing and allergy shots, read how long an allergy test takes, and find out when allergy season peaks in Florida. If your allergies affect your breathing, see asthma, COPD and lung care.

Call the office to ask about testing and shots. New patients can start with the new patient guide.