Setting Up an In-Office Allergy Lab

Written by Empire Medical Training Editorial Team

Medically reviewed by Sherry Wehner, MD Board-Certified Pathologist & Dermatopathologist; Aesthetic & Wellness Medicine

Updated June 2026 ·10 min read

For most primary care, aesthetic, and wellness practices, allergy patients are already walking through the door — they just get referred somewhere else. Allergies are remarkably common: they affect more than 56 million Americans, roughly 30% of adults have environmental allergies, and at least 10% have a food allergy. Allergy is the sixth leading cause of chronic disease in the United States. An in-office allergy lab is simply the infrastructure that lets you keep that care — the testing, the immunotherapy, and the follow-up — under your own roof instead of handing it to someone else.

Dr. Sherry Wehner, who built allergy testing and treatment into her own San Antonio practice, frames it plainly: an in-house allergy lab brings additional revenue and patient satisfaction to a practice, and it is one of the more rewarding service lines a clinician can add. This guide explains the why and the high-level what. It is clinical and operational education, not a turnkey build-out recipe — the actual setup, vendor selection, supplies, and day-to-day operations are taught in Empire's Allergy Test and Treatment course, and they belong there.

Why an in-house allergy lab matters

The case for building an in-office allergy lab rests on three pillars: control, patient experience, and a sustainable service line. When testing and treatment happen in your own office, you control the schedule, the results, and the follow-up immunotherapy — you are not waiting on an outside specialist's calendar or losing the patient to another practice entirely. That continuity is what allows you to actually treat allergic disease rather than just identify it.

The patient experience improves for the same reason. A patient who can be tested, counseled, and started on a treatment plan in one familiar setting is a patient who stays engaged — and allergy immunotherapy is a long relationship, often a year or two of regular visits. Wehner describes immunotherapy as the most rewarding part of allergy care precisely because of that arc: a patient with lifelong, debilitating seasonal allergies who, after a course of allergy shots, can lead a relatively normal life. That outcome is far easier to deliver when the care lives in your practice.

Finally, allergy is a sustainable, reimbursable service line. Demand is large and durable, testing and immunotherapy are recognized and billable services, and the recurring nature of immunotherapy visits builds a predictable patient base. For a practice already seeing patients with rhinitis, sinusitis, conjunctivitis, eczema, or asthma, the clinical need is already present — the allergy lab is what lets you meet it. To see how this fits into a broader practice strategy, our companion guide on how to add allergy testing to your practice walks through the business case in more depth.

The essentials, at a high level

Setting up an allergy lab is less about a single piece of equipment and more about assembling several connected systems. At a high level, a functioning in-office allergy lab needs:

• Space and clinical setup — dedicated exam space and scheduled time for testing and for immunotherapy injections, with room to observe patients afterward.
• Antigens and extracts, with proper storage — the allergen panels appropriate to your region of the country, supplied as vials of standardized extracts, kept under correct refrigeration and inventory control.
• Testing supplies — the consumables for your testing method, such as plastic skin-prick applicators for in-house skin testing, or the materials and reference-lab arrangement for blood-based specific-IgE testing.
• Trained staff — clinical staff competent to perform and read testing, administer immunotherapy, and recognize and respond to a reaction. A quality lab partner will often provide a trained technician to help you start.
• Safety and emergency equipment — epinephrine and a trained team ready to treat anaphylaxis, every time testing or injections occur. This is covered in its own section below because it is non-negotiable.
• Documentation and quality systems — consent forms, intake records, and per-visit documentation of dose, site, time, and any adverse reaction, plus the quality controls that keep testing reproducible.
• A billing and coding workflow — the front-to-back process that ensures the services you provide are actually captured and reimbursed.

Notice what this list is not: it is not a parts catalog, a price sheet, or a step-by-step build-out you can execute from a web page. Each of these elements has real clinical and operational detail behind it, and getting them wrong has consequences for patient safety and reimbursement alike. That detail — how to choose vendors, how to stock and store antigens, how to train staff, how to structure the workflow — is exactly what the hands-on course is for.

Working with a quality allergy lab

One of the most important early decisions is whether and how to partner with an outside allergy lab. For most practices, especially when starting out, partnering is the right call. Wehner draws a useful analogy: just as a clinician does not compound their own prescription medications but relies on a pharmacist, most providers do not mix their own immunotherapy serums — they use a certified allergy lab for that. It is the safer, faster way to launch.

A full-service, turnkey allergy lab provides the supplies needed for testing and administration, expertise in ordering the correct allergens, customizable immunotherapy solutions, and a full array of allergens matched to your region of the country. Good partners will also help with billing and coding, assist with diagnosis and treatment questions, often provide a trained technician, and may offer a specialized laboratory for blood or serum testing. Many charge a flat fee per test or injection, which keeps the economics predictable as you grow.

There is also a more involved path: mixing your own immunotherapy serums. It is genuinely possible, and it captures more reimbursement — but it demands more training and more time. The complexity is real: you have to manage cross-reactivity (where one antigen can cover several related ones), know which antigens cannot be mixed together, and handle stepped dosing schedules where some antigens are introduced before others. For that reason, Wehner recommends working with a certified lab at least when you first start out, and graduating to in-house mixing only after you have the training to do it safely. Empire's course covers both models so you can choose deliberately rather than by default.

In-house vs. send-out: choosing your model

Few practices are purely one or the other. The realistic question is not “in-house or send-out” but which components you keep in-house and which you route to a partner or reference lab. Most successful allergy programs blend the two: in-house skin testing and immunotherapy administration, paired with a reference lab for serum (blood) testing and immunotherapy serum production.

The right blend depends on your patient population, your staff, and how much you want to take on at launch. A common, sensible starting point is in-house skin testing with a turnkey lab partner handling antigens, serums, and serum testing — then expanding what you do in-house as your team's competence and volume grow. For the testing-method tradeoffs themselves, see our overviews of skin testing for allergies and blood testing for allergies.

Safety: emergency preparedness is non-negotiable

This is the section that gates everything else. Allergy testing and, especially, allergy immunotherapy involve deliberately exposing a sensitized patient to allergens — which means a systemic allergic reaction, including anaphylaxis, is always possible. No allergy lab should operate without being ready to treat one.

Anaphylaxis is a medical emergency, and first-line treatment is intramuscular epinephrine. That is not optional, and it is not negotiable. A safe allergy lab keeps epinephrine immediately available wherever testing or injections happen, trains every staff member involved to recognize and treat a systemic reaction, and observes patients for an appropriate interval after immunotherapy injections rather than sending them out the door immediately. Skin testing, too, must be performed with emergency preparedness on hand.

This is also where clinical judgment and referral come in. Patients with a history of anaphylaxis, severe or uncontrolled asthma, or prior systemic reactions are higher-risk and may warrant specialist involvement. Immunotherapy itself carries a built-in safety protocol: if a patient reacts to a dose, you step the dose back down to the last well-tolerated level and re-advance from there rather than pushing forward — a discipline taught in detail in the course. The takeaway is simple: a practice that is not prepared to manage anaphylaxis is not prepared to run an allergy lab.

Documentation, consent, and quality

An allergy lab generates a steady stream of records, and they matter for both care and reimbursement. Testing begins with a proper consent form that explains what the test is, what it is used for, and what to do beforehand — Wehner also recommends a cancellation policy on these appointments. Immunotherapy adds an intake consent describing the purpose of the injections and the information each visit must capture.

For every immunotherapy visit, the record should document the date, patient name and date of birth, the dose received, the injection site, any medications the patient is taking that day, the time of the dose, and any adverse reaction — the same disciplined documentation that underpins all good medical record-keeping. Reproducible technique and consistent records are what make an allergy program defensible and auditable, and they are part of the quality system, not an afterthought. Empire's training provides the consent and intake forms and the documentation framework through the physician portal so you are not building these from scratch.

Billing and coding, in brief

You can do all the clinical work flawlessly and still leave money on the table if the billing is wrong. Wehner notes that the average physician loses an estimated 10–30% of potential revenue to incorrect coding — on a $200,000 practice, that is $20,000–$60,000 a year — and that failing to bill for services actually performed compounds the loss. For an allergy program, getting this right is a meaningful part of whether the service line is sustainable.

At the conceptual level, allergy billing pairs two kinds of codes: a procedure (CPT) code for each service you perform — the testing, the immunotherapy — and a diagnosis (ICD-10) code that establishes the medical necessity that justifies reimbursement. The principle is straightforward; the specifics are not. Choosing the correct, reimbursable codes for each test and treatment, and aligning them with documented medical necessity, is detailed and changes over time — which is why the full, current code lists and the coding workflow are taught in the course rather than published here. A good lab partner will also help you navigate coding and reimbursement as you launch.