Open one insurer's public transparency file for a single metro and count something almost nobody counts: how many different in-network prices it publishes for the same billing code. Not the spread, not the average — the number of distinct rate values.
For a comprehensive metabolic panel — CPT 80053, one of the most ordinary blood tests in medicine — BlueCross BlueShield of Tennessee's in-network home-network file for the Nashville area lists 97 distinct prices across roughly 47,700 providers, and about 39% of them are on the single most common rate. For a complete blood count (85025), it's 64 distinct prices, with 43% of providers sharing one rate to the penny.
Now look at a routine established-patient office visit in the same file — CPT 99214, the most-billed physician service in the country. It carries 1,491 distinct prices. The single most common rate covers about 7% of providers. A new-patient visit (99204) has 1,535 distinct prices.
Same insurer. Same city. Same file. Sixty-four prices for the blood test, fifteen hundred for the office visit. That is not a rounding difference or a data artifact. It is two completely different pricing machines running inside one contract — and knowing which one you're in changes what you should do about your rates.
The number of prices is the tell
When an insurer publishes only a few dozen prices for a code and packs half the providers onto one of them, you are not looking at thousands of negotiations that happened to converge. You are looking at a fee schedule — a rate table the payer assigns providers onto. Unrelated practices don't independently negotiate their way to the identical penny; they get placed there.
When the same insurer publishes fifteen hundred prices for a code and the most common one covers fewer than one provider in ten, the opposite is true. That is the footprint of individual negotiation — a long, dispersed tail where a provider's rate reflects who they are and what they agreed to, not a slot they were dropped into.
So the distinct-price count is a diagnostic. Few prices, high concentration → you were assigned. Many prices, low concentration → you negotiated (or failed to). And in this file the two regimes split cleanly along one line: commodity services are assigned; physician cognitive and procedural work is negotiated.
The commodity side: one price, take it
Labs are the purest case. Here is what the file pays and how tightly it's packed:
| Test | Distinct prices | % on the single most common rate | Typical rate |
|---|---|---|---|
| Complete blood count (85025) | 64 | 43% | ~$9 |
| Comprehensive metabolic panel (80053) | 97 | 39% | ~$6 |
Across the five most common rates, more than 80% of every provider on each test is accounted for. A blood test is a commodity — a machine runs it, the result is the result — and the insurer prices it like one: a short list of rates, most everyone on the same low number, measured in single dollars. There is nothing here to negotiate, and the file shows nobody really did.
The negotiated side: fifteen hundred prices, clustered at Medicare
Physician work behaves nothing like that. Office visits, physical therapy, and a common joint injection each carry roughly a thousand to fifteen hundred distinct prices, and the most common rate never covers even one provider in ten:
| Service | Distinct prices | % on top rate | Median rate | Median vs Medicare |
|---|---|---|---|---|
| Office visit, established L3 (99213) | 1,438 | 9% | $81.10 | 0.85× |
| Office visit, established L4 (99214) | 1,491 | 7% | $114.14 | 0.84× |
| Office visit, established L5 (99215) | 1,508 | 7% | $161.25 | 0.84× |
| Office visit, new L4 (99204) | 1,535 | 9% | $178.33 | 1.01× |
| Office visit, new L5 (99205) | 1,522 | 7% | $214.59 | 0.91× |
| Physical therapy, ther. exercise (97110) | 1,006 | 8% | $30.15 | 1.04× |
| Joint injection, major (20610) | 1,531 | 8% | $65.63 | 0.95× |
Two things jump out. First, the dispersion is real: even where a round-number "list price" exists — $100.00 for a level-3 visit, $220.00 for a new-patient level-4 — only about one provider in ten is on it, and everyone else is scattered across a thousand-plus other rates. This is a market of individual deals, not a schedule.
Second, and more important for a finance team: the typical negotiated rate lands right at Medicare. The median established-visit rate is 0.84–0.85× the Medicare fee; new-patient visits, PT, and the injection sit between 0.91× and 1.04×. After all fifteen hundred negotiations, the middle of the market is the government rate — sometimes a hair below it. The dispersion is wide, but it's centered on Medicare, not multiples above it.
The third machine: imaging, assigned and marked up
There's a service line that fits neither pattern cleanly, and it's the one we've written about before: imaging. Imaging in this same file isn't a single-price commodity like labs, and it isn't a dispersed negotiation like office visits. Its dominant rates are penny-identical schedules shared by thousands of providers — and, unlike anything else in the contract, those schedules are stacked in strict proportion (the top standard imaging schedule runs a constant 4.23× the bottom one across nearly every code) and priced at roughly three times Medicare at the top tier.
Put the three side by side and the contract stops looking like one negotiation and starts looking like three separate decisions the insurer made about where to spend and where to standardize:
- Labs — assigned, one price, priced at pennies.
- Physician visits, PT, injections — negotiated, fifteen hundred prices, priced at Medicare.
- Imaging — assigned to proportional tiers, priced at up to 3× Medicare.
Your leverage and your markup are in different places
Here is the trap, and it's the whole reason to count prices instead of averaging them.
The services where you have negotiating leverage — office visits, the daily physician work that fills your schedule — are already priced at Medicare. There are fifteen hundred prices, which means the door is open, but the room is nearly empty: the market has already settled around the government rate, so even a hard negotiation moves you a little.
The service with the real markup — imaging at 3× Medicare — is the one you can't negotiate line by line, because it isn't a negotiation. It's a schedule assignment. You don't argue your MRI rate down; you get moved to a different tier, or you don't.
So the money and the leverage sit in different rooms. A provider org that pours its energy into haggling office-visit rates is negotiating hard in the one place the market has already flattened, while the schedule-assigned imaging line — where the dollars actually are — gets treated as fixed because "that's just the rate." It isn't a rate. It's a placement, and placements can be challenged, bundled, or steered around.
How to read your own contract
The practical move takes an afternoon and one public file:
- Count the distinct prices for each of your high-volume codes. A code with dozens of prices and heavy concentration is a schedule you were assigned to — ask which tier you're on and what the next one pays, not whether your rate is "good." A code with a thousand-plus prices is a negotiation you're already inside — there your rate reflects your leverage, and the benchmark that matters is Medicare, because that's where the middle of the market actually sits.
- Don't spend negotiation capital where the market is already flat. If your office-visit rates are near Medicare, so is nearly everyone's; there's a little to win, not a lot. Confirm it, then move on.
- Push hardest where you were assigned, not where you negotiated. The schedule-assigned, marked-up lines — imaging first — are where the gap between the top tier and the bottom is largest, and where "that's just the rate" is doing the most work to keep you from asking.
None of this needed inside information. It's one insurer's public file for one city, read against the public Medicare fee schedule, with the prices counted instead of blended. The single number that reorganizes the whole picture — how many different prices exist for one code — is sitting in the file, and almost nobody looks at it.
Methodology: rates are the negotiated in-network amounts for the CPT codes shown, drawn from BlueCross BlueShield of Tennessee's home-network machine-readable file for the Nashville area (series 890, vintage 2026-07-27), parsed from the raw file after expanding its provider-reference groups to individual NPIs. "Distinct prices" counts unique negotiated rate values for a code across all provider NPIs (each provider counted once, at its median rate for the code); "% on the top / most common rate" is the share of provider NPIs carrying the single most frequent rate. Office-visit, PT, injection, and lab rates are the global (undivided) amounts; imaging figures are the global-component amounts and proportional-schedule findings reported in our earlier analysis of the same file. "× Medicare" is the ratio to the 2026 national Medicare Physician Fee Schedule non-facility rate for the code (total RVU × the 2026 conversion factor of $33.4009). Laboratory tests are paid under the separate Clinical Laboratory Fee Schedule and carry no Physician Fee Schedule multiple, so they are shown in absolute dollars only. Provider counts per code range from roughly 46,000 to 51,000 NPIs. No provider or customer names are used; every figure is reproducible from the source file and the published fee schedules.