Allergy Test Shots vs Treatment Shots: Two Different Procedures
Allergy testing and allergy treatment shots are different procedures. Allergy test shots — percutaneous prick test (CPT 95004) or intradermal test (CPT 95024) — are one-visit diagnostic procedures that identify sensitization. Allergy treatment shots (SCIT, CPT 95115/95117/95165) are a 3-to-5-year subcutaneous immunotherapy course that modifies the immune response. Same allergen extracts, different dilutions, different sites, different purposes.
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Allergy test shots (CPT 95004 prick test, CPT 95024 intradermal) are one-visit diagnostic procedures. Allergy treatment shots (SCIT, CPT 95115/95117) are a 3-to-5-year immunotherapy course. Testing identifies sensitization. Treatment modifies it.
The essentials
Allergy testing and allergy treatment shots are different procedures — and the page must state this clearly upfront.
Allergy test shots — also called allergy skin testing — are diagnostic procedures used to identify which allergens a patient is sensitized to. The two main methods are the percutaneous skin prick test (SPT, CPT 95004) and intradermal testing (CPT 95024). Both are one-visit procedures that use dilute allergen extracts to provoke a local skin reaction, which is read at approximately 15-20 minutes. They are purely diagnostic — they do not modify the immune response or treat allergy. Skin prick and intradermal testing are performed in-clinic because an allergist reads the wheal response and monitors for systemic reactions — this diagnostic step is not something performed at home.
Allergy treatment shots — SCIT (subcutaneous immunotherapy) — are a multi-year therapeutic course that follows a confirmed diagnosis. SCIT involves escalating subcutaneous injections of allergen extract over a build-up phase of 24-28 weeks, then maintenance injections every 2-4 weeks for a total course of 3-5 years, per the AAAAI/ACAAI/JCAAI Practice Parameter Third Update (Cox L, Nelson H, Lockey R et al., J Allergy Clin Immunol 2011;127(1 Suppl):S1-S55, DOI 10.1016/j.jaci.2010.09.034). SCIT modifies the underlying immune sensitization — it is not symptomatic treatment.
CPT code differences (per CMS Articles A57472 and A57473): Allergy testing — CPT 95004 (percutaneous prick test), CPT 95024 (intradermal test). Allergy treatment — CPT 95115 (single-injection SCIT administration), CPT 95117 (two or more injection administration), CPT 95165 (professional service for allergen immunotherapy preparation, per dose unit). Patients who see both sets of codes on an EOB can confirm this: the testing encounter is a separate, single-visit claim; the treatment encounters recur weekly or biweekly over years.
Curex uses at-home IgE blood testing as the diagnostic step — confirming which allergens are sensitizing without requiring an in-clinic prick or intradermal test. Once sensitization is confirmed and an allergist determines candidacy, Curex's at-home allergy shot program delivers the treatment phase: a personalized allergen extract sterile-compounded to USP <797> standards, self-administered as one weekly shot at home for $129/month, with the first dose supervised live over Zoom by your prescribing allergist.
How allergy shots retrain your immune system
The biological distinction between allergy testing and allergy treatment explains why they cannot be confused. Allergy testing creates a controlled, localized provocation — a small dose of allergen applied superficially or intradermally to detect whether the immune system produces a visible local IgE-mediated reaction. No tolerance induction is intended or produced. SCIT, by contrast, delivers escalating doses of allergen subcutaneously over years specifically to reprogram the immune response. The mechanisms: expansion of allergen-specific regulatory T cells (Tregs), class switching of allergen-specific IgE to IgG4 (blocking antibody), suppression of Th2 cytokines (IL-4, IL-5, IL-13), and reduction of mast cell and basophil reactivity. These immunological changes accumulate over the 3-to-5-year course and persist after treatment ends (Durham SR et al., N Engl J Med 1999;341:468-475). A single skin test produces no such changes.
Diagnostic Step — Confirming Sensitization
Allergy skin prick test (CPT 95004) or intradermal test (CPT 95024), or specific IgE blood test (ImmunoCAP), confirms which allergens the patient is sensitized to. This is the prerequisite for any treatment decision. SCIT requires confirmed IgE sensitization before initiation per Cox 2011 patient-selection criteria.
Treatment Decision — Selecting Immunotherapy Route
Based on sensitization profile, symptom severity, and patient preference, the allergist selects SCIT (subcutaneous injections), SLIT (sublingual drops or tablets), or pharmacotherapy. SCIT is compounded from the allergen sources confirmed in the diagnostic step — but at different concentrations and with a different clinical intent.
Treatment Execution — SCIT Build-Up and Maintenance
SCIT injections (CPT 95115/95117) are administered subcutaneously into the posterolateral upper outer arm, escalating from dilute to maintenance concentration over 24-28 weekly build-up visits, then maintained every 2-4 weeks for 3-5 years. Each visit requires 30-minute post-injection observation. The procedure shares extract sources with skin testing but has entirely different anatomy, depth, dilution, frequency, and immunological purpose.
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See if at-home shots are right for youFrequently asked questions
What are allergy test shots?
Allergy test shots refer to allergy skin testing procedures used to diagnose which allergens cause a patient's symptoms. The percutaneous prick test (CPT 95004) places extract drops on the volar forearm or back and pricks through each drop; reactions are read at 15-20 minutes. Intradermal testing (CPT 95024) injects dilute extract into the dermis for a more sensitive detection. Both are one-visit diagnostic procedures that identify sensitization — they do not treat allergy. A specific IgE blood test (ImmunoCAP) is the in-vitro alternative that also identifies sensitization without any injection.
Are allergy test shots the same as treatment shots?
No. Allergy test shots (skin prick test CPT 95004, intradermal test CPT 95024) are diagnostic — one visit, results in 15-20 minutes, purpose is sensitization identification. Allergy treatment shots (SCIT, CPT 95115/95117/95165) are therapeutic — 24-28 build-up visits plus 3-5 years of maintenance, purpose is immune tolerance induction. Both use allergen extracts from the same sources, but at different concentrations, at different anatomical sites (volar forearm vs upper outer arm), and with entirely different immunological goals. On an EOB, CPT 95004 or 95024 is testing; CPT 95115 or 95117 is treatment.
Do I get a test shot before starting allergy treatment shots?
Allergy skin testing (or IgE blood testing) is a required diagnostic step before SCIT can be prescribed — but it is a separate procedure, not a 'test shot' of the treatment. Skin testing uses dilute diagnostic concentrations of allergen on the volar forearm or back; SCIT treatment is given subcutaneously in the upper outer arm at therapeutic concentrations. After testing confirms sensitization, the allergist prescribes a custom treatment vial based on the results. The two procedures may happen at the same allergist practice, but they are categorically different and billed separately under different CPT codes.
Where are allergy test shots given versus treatment shots?
Allergy skin prick testing (CPT 95004) is performed on the volar (inner) forearm or back — the extract is applied to the skin surface, and a lancet prick delivers a superficial dose. Intradermal testing (CPT 95024) is also typically on the volar forearm, injecting into the dermis (not subcutaneous). SCIT treatment shots (CPT 95115/95117) are given subcutaneously into the posterolateral upper outer arm (deltoid region), alternating arms each visit. Different anatomical sites, different injection depths (epidermal vs intradermal vs subcutaneous), and different doses distinguish the procedures.
Can I see allergy test results and treatment on the same EOB?
Yes. If allergy skin testing and SCIT treatment both occur at the same allergist practice, they can appear on the same EOB with different CPT codes. Testing codes: CPT 95004 (prick test) or CPT 95024 (intradermal test). Treatment codes: CPT 95115 (single injection), CPT 95117 (two or more injections), CPT 95165 (vial preparation). If you see both sets on one statement, the testing line is the diagnostic visit and the treatment lines are ongoing SCIT administration visits. The billing distinction per CMS Articles A57472 and A57473 separates the two explicitly.
Is an IgE blood test the same as an allergy test shot?
A specific IgE blood test (e.g., ImmunoCAP) achieves the same diagnostic goal as allergy skin testing — identifying which allergens a patient is sensitized to — but without any injection or skin prick. It requires a blood draw, not an intradermal or percutaneous injection. Specific IgE testing is an accepted alternative to skin testing for confirming sensitization before SCIT is initiated, per Bernstein IL et al. (Ann Allergy Asthma Immunol 2008;100(3 Suppl 3):S1-148). When patients search 'allergy test shots,' they may mean skin prick testing, intradermal testing, or simply 'how do I get tested' — all three paths lead to the same diagnostic output: a sensitization profile that guides the SCIT prescription.
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This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about a medical condition. Content reviewed by board-certified allergists at Curex.