Building a Seasonal Respiratory Testing Inventory Plan Before the Fall Surge

The practices that sail through respiratory season are not the ones that react fastest to the first wave of sick visits — they are the ones that planned their inventory in the summer, weeks before the phones started ringing. By the time flu and RSV activity climbs in October and November, the buying window that protects your margins and your workflow has already closed.

Mid-summer is the right moment to build a seasonal testing inventory plan. Demand is predictable enough to forecast, lead times are still comfortable, and you have room to correct a bad estimate before it costs you a diagnosis. Here is a framework for doing it deliberately.

Start With Last Season's Volume, Not a Guess

Every inventory plan should begin with your own historical data. Pull last year's visit counts and test utilization by month for October through March. Most practices see respiratory testing demand quadruple or more between a quiet September and a peak week in December or January. If you don't have clean numbers, even a rough tally of boxes ordered per month gives you a usable baseline.

Break the season into three phases so you are not forecasting one enormous, blurry number:

• Ramp (September–October): back-to-school strep, early influenza, and the first RSV cases in pediatric patients.
• Peak (November–January): concurrent flu, RSV, and strep circulation. This is where shortages hurt most.
• Tail (February–March): a long, uneven decline with secondary influenza B waves.

Forecasting each phase separately keeps you from over-ordering for a peak that lasts six weeks and then sitting on expiring stock in April.

Cover the Three Tests That Overlap

Respiratory season is defined by overlap: the same patient presenting with fever and sore throat could have influenza, RSV, or strep, and the clinical picture rarely tells you which. A credible seasonal plan stocks all three so you are not sending a patient home undiagnosed because one line item ran out.

• Influenza A & B rapid test — your highest-volume respiratory line from November through February. Build the deepest buffer here.
• RSV rapid test — demand starts earlier than many practices expect, often ramping in October, and matters most for pediatric and older adult patients.
• Strep A rapid test — steadier year-round but spikes alongside the school calendar, so it rarely moves in lockstep with the viral tests.

Because these three don't peak on the same week, ordering them in a single fixed ratio is a common mistake. Track them as separate lines with separate par levels. It is also worth carrying a modest baseline of a non-respiratory workhorse like the hCG urine pregnancy test through the season, since a fever-and-abdominal-pain visit doesn't pause for flu season. You can review the full rapid test catalog when you map your par levels.

Set Par Levels and a Reorder Point

A par level is simply the quantity you want on the shelf at all times for a given phase. Calculate it from three inputs: your weekly usage estimate, supplier lead time, and a safety stock buffer for the weeks demand runs hot.

A workable formula for each test:

Reorder point = (average weekly usage × lead time in weeks) + safety stock.

For example, a mid-size urgent care burning through roughly 60 flu tests a week at peak, with a two-week lead time and a one-week safety buffer, wants to reorder before it drops below about 180 tests on hand (60 × 2 + 60). Set that trigger in whatever system you already use — even a shared spreadsheet with a highlighted threshold works — so reordering is a rule, not a scramble when a staff member notices the shelf looks thin.

Revisit par levels at each phase transition. The peak-season number that keeps you safe in December will leave you badly overstocked if you carry it into March.

Stage Orders Instead of Buying One Large Batch

The instinct to place one giant pre-season order is understandable, but it concentrates risk. A single batch ties up cash, fills your storage, and — most importantly — clusters your expiration dates so that everything you didn't use ages out at once.

Staged ordering solves all three problems. Place a foundational order in late summer to cover the ramp, then schedule smaller replenishment orders keyed to your reorder points through the peak. You keep less cash on the shelf, you spread expiration dating across several lots, and you retain the flexibility to scale up quickly if the season turns severe. Rapid antigen tests typically carry dating measured in many months to a year-plus, but staging still matters — a lot you receive in July has less runway than one you receive in November.

Two operational habits protect the plan once stock arrives:

• First-expiry, first-out. Shelve new lots behind existing ones and always pull the nearest expiration first. Respiratory season is exactly when careless stocking turns into wasted inventory.
• A standing storage check. Rapid tests are sensitive to temperature extremes. Confirm your storage area holds the manufacturer's stated range before you fill it with a season's worth of kits.

Plan the Adjacent Supplies, Too

A testing plan that ignores everything around the test is only half a plan. Swabs, collection tubes, gloves, and disposal supplies all move faster in a high-volume season, and a shortage of any one of them stalls the same workflow as an out-of-stock test. Add these consumables to the same par-level exercise so a run on flu tests doesn't quietly drain your swab supply at the worst possible moment.

If your practice also handles minor procedures during the winter — the season brings its share of lacerations and follow-ups — it is a sensible time to confirm your suture removal kits and other single-use procedure supplies are stocked while you have a purchasing cycle open anyway.

Review, Then Commit

Once your numbers are set, write them down: par level and reorder point per test, per phase, plus the dates you intend to place staged orders. A one-page plan turns respiratory season from a recurring fire drill into a routine. Review it against actual usage every few weeks and adjust — forecasts are starting points, not commitments.

If you would like help sizing a seasonal order or mapping par levels to your visit volume, our team can put together a wholesale quote built around your practice. Request a quote and we'll help you stage your respiratory season before the surge arrives.