Why allergy and immunology billing needs its own workflow
Allergy and immunology billing combines diagnostic testing, months or years of injections, and expensive biologics, often for the same patient. Each piece has its own codes, units and benefit rules. Fastora's certified billing and coding professionals handle these claims for allergy practices as part of our wider medical billing services.
The financial pattern is unusual too. A testing day may produce one larger claim, followed by weekly or monthly injection claims worth far less. Small errors in units or modifiers repeat on every visit, so they need to be fixed at the charge level rather than claim by claim.
Eligibility and benefits for testing, injections and biologics
One plan can treat each service differently. Testing may apply to the deductible, each injection visit may carry a specialist copay, and a biologic can fall under the medical benefit or the pharmacy benefit depending on the drug and plan. We run benefits verification on each piece before the first test.
Patients on multi-year immunotherapy should know their per-visit cost before they start. Explaining copays and deductibles upfront helps reduce later disputes and missed appointments, and coverage is rechecked at each plan year.
Prior authorization for biologics and extended testing
Biologic therapies commonly need authorization with a documented diagnosis, prior treatments tried and objective measures such as lung function or lab values. Renewals usually ask for evidence that the patient responded. We submit and track these through our prior authorization service.
Some plans also cap the number of allergy tests per year or require approval for testing beyond a set panel. Renewal dates and test limits are tracked so injections and repeat tests are not performed without a current approval.
Allergy testing billing and immunotherapy codes
| Code | Descriptor (summary) | Billing note |
|---|---|---|
| 95004 | Percutaneous tests (scratch, puncture, prick) with allergenic extracts, immediate type reaction, specify number of tests | Units equal the number of tests |
| 95024 | Intracutaneous (intradermal) tests with allergenic extracts, immediate type reaction, specify number of tests | Units equal the number of tests |
| 95044 | Patch or application tests, specify number of tests | Units equal the number of patches |
| 95115 | Professional services for allergen immunotherapy, not including provision of extracts; single injection | Injection only |
| 95117 | Same service; 2 or more injections | Billed once per visit |
| 95144 | Supervision of preparation and provision of antigens for allergen immunotherapy, single dose vial(s) | Specify number of vials |
| 95165 | Supervision of preparation and provision of antigens for allergen immunotherapy, single or multiple antigens | Specify number of doses |
Allergy testing billing depends on the count. The units on 95004 or 95024 should match the number of tests documented, including controls only where the payer allows them. Test results, the extracts used and the reading time belong in the note.
Antigen doses under Medicare
Medicare defines a billable 95165 dose as a 1 cc (1 mL) aliquot from a single multidose vial, so units follow that definition rather than the number of vials mixed. Medicare does not pay the complete-service codes 95120–95134; practices bill the injection codes and the antigen preparation codes separately. Some commercial payers count doses differently, so allergy immunotherapy billing follows each payer's written policy.
Documentation and modifiers on injection days
An E/M visit on a testing or injection day needs modifier 25 and a note that shows a separate, significant service, such as evaluation of a new problem or a change in treatment. A routine injection visit with a brief check usually does not qualify.
Venom immunotherapy and accelerated build-up schedules bring more injections per visit and longer observation periods, so the injection code, units and protocol in the chart need to line up. Each extract vial should be documented with contents, dilution and the date it was prepared.
Common allergy billing denials and how we prevent them
| Denial | Typical cause | Prevention step |
|---|---|---|
| Units exceed allowed | Antigen doses counted by vial, or more tests than the payer allows | Units matched to the payer's dose and test limits |
| Modifier 25 denied | E/M billed with a routine injection visit | Modifier applied only with separate documentation |
| Frequency limit | Repeat testing within the payer's window | Change in symptoms or exposure documented before retesting |
| No authorization | Biologic given after the approval expired | Renewal dates tracked by patient |
| Wrong benefit | Biologic billed to medical when the plan covers it under pharmacy | Benefit route confirmed before the first dose |
Every claim passes our Advanced Pre-Submission Claim Review before submission. Denials that still occur are corrected or appealed with the record, and frequency denials for repeat testing are appealed with documentation of a change in symptoms or exposure.
Following up on immunotherapy AR
Injection claims are small and frequent, so unpaid ones are easy to miss. We review open injection claims in batches by payer, which shows patterns such as a payer denying every 95117 claim, and send patient balances on a predictable cycle through our patient billing service.
Credentialing for allergists and immunologists
Allergists enroll individually and reassign benefits to their group, and practices that add satellite injection clinics need each location reflected in payer files. Physician assistants and nurse practitioners who see allergy patients may need their own enrollment, depending on the payer.
Our credentialing and enrollment team tracks each file through a nine-stage process, from document collection and NPI and CAQH setup to payer applications, follow-ups and final approval.
How Fastora works with allergy practices
Fastora works inside your existing EHR/PM system under the user access you grant, with no software to install and no hidden setup fees. You get a dedicated account contact, transparent dashboards, monthly performance reporting and a monthly review call.
Fees are quoted after a free assessment, and you can review how our pricing models work beforehand. To see how your allergy billing services perform today, start with a free billing assessment.
Allergy billing: testing, shots and biologics
Allergy and immunology medical billing mixes three very different revenue streams: skin testing with its per-test coding rules, immunotherapy with weekly or cluster shot schedules, and biologics that need buy-and-bill handling plus prior authorization. Our allergy and immunology billing services track each stream separately — test units billed correctly, shot schedules matched to administered doses, biologic claims carrying the authorization from day one.
As an allergy billing company focused on the specialty details, the work we watch closest is authorization and medical necessity documentation, because that is where allergy claims most often stall. Related services: prior authorization service, eligibility verification, medical billing services.