In allergy and immunology, the office visit is rarely the money. The revenue lives in unit counting and buy-and-bill, and Kent's payer mix makes both harder to get right. Skin and intradermal testing is paid per individual test, with the units set to the number of tests performed and held inside each payer's annual cap and medically unlikely edit — never reported as a single panel unit. Report one unit for a 40-prick panel and you underbill by thousands across a year; report more units than the plan's cap allows and you invite a takeback.
Antigen preparation is the single most-audited line in the specialty. The preparation code is billed from the mixing log at one cc per dose, capped at ten billable doses per multidose vial for Medicare, and the preparation service is entirely separate from the injection-administration service. When a Kent nurse gives two or more injection visits, the administration code is billed once per encounter — never multiplied by the number of shots — and the antigen line is billed only when your practice actually prepared the vial. Miss the prep-versus-administration split and you either lose the antigen revenue or trigger a duplicate-service denial.
Then there are biologics for severe asthma and chronic urticaria. In Kent's managed-care-heavy Apple Health environment, prior authorization must be confirmed before the drug is administered, the HCPCS unit math has to be exact, and the discarded-drug modifier belongs on single-dose vials. A $30,000-a-year drug pays or it doesn't based on those three facts. Add benefit routing — medical versus pharmacy benefit — that changes across Amerigroup, Community Health Plan of Washington, Coordinated Care, Molina, and UnitedHealthcare Community Plan, plus Noridian as the Part B carrier for Washington, and the reason for a professional, allergy-specific billing partner becomes obvious.
Kent's practical reality raises the stakes further. A large share of families in the Valley speak a language other than English at home, which lengthens front-desk intake and makes eligibility mistakes easier to introduce and harder to catch. When Apple Health coverage churns month to month, a patient who was active at the last shot visit can be retroactively terminated by the next one, and a shot series billed against lapsed coverage becomes an uncollectable write-off unless someone re-verifies before every encounter. High-deductible commercial plans out of the SeaTac and Kent industrial employers add another wrinkle: a patient may owe the full contracted rate on early-year testing, so an accurate estimate and a clean patient statement protect both the relationship and the collection. None of this is exotic allergy medicine — it is disciplined, local revenue-cycle work that a generalist vendor simply does not build workflows around.