CMS descriptor · RBCS classification · Medicare Part B physician/supplier claims, 12-year window · National figures — the AZ market is below
Live example
You’re looking at the paid view, on real data.
Sestamibi, the nuclear heart-imaging tracer (A9500), in Arizona is
Nevvi’s open example market; every market on a plan renders exactly
like this.
Market sizeThe volume of this code in the market for the year: an all-Medicare estimate scaled from the observed fee-for-service count where one can be drawn, otherwise the narrower count the row names.~62,411
all-Medicare services · est.(32,864 observed FFS).
The #5 state market of
50
by est. all-Medicare volume.
Billing groupsHow many named billing organizations billed this code in the market, and the services they billed between them. Billing that falls under CMS's 11-beneficiary disclosure floor is absent from the published record.34
groups
bill
A9500 in Arizona —
19,190
observed fee-for-service services
(at the ≥11-beneficiary disclosure floor).
GrowthHow this code's volume changed year over year and over five years. A change between two years of the record, never a projection of what comes next.Down 4.5%
year over year; -20.2%
over five years, #31 of 49
by five-year growth.
Market structureHow much of the state's named-group volume the five largest billing groups hold, banded: under 40% fragmented, 40–60% moderately concentrated, 60–80% concentrated, 80%+ highly concentrated. Our bands, not a regulator's. Not shown for markets under 11 billing groups, or where named groups cover under 25% of the state's disclosed volume — both published floors.Moderately concentrated —
34 billing groups,
the top five holding
53%
of named-group volume.
Concentration trendHow the five largest groups' share of this market moved between the two years shown. An endpoint comparison on the group roster, not a reading of every year in between.
More concentrated in 2024
than
2020
(top 5 hold
42% → 69%,
group-roster grain).
Medicare paymentWhat Medicare paid for this code in the market over the year, and the payment per service. Observed fee-for-service payments only: Medicare Advantage is paid by capitation and is not counted.
Medicare paid
$2.4M
for A9500 in Arizona in 2022
(observed FFS payments) —
$74.46
per service, 21%
below
the national $94.72.
Market Brief A9500
A shareable PDF report summarizing this market’s size, trends, and providers.
Arizona ranks #5 of the 50
state markets by est. all-Medicare services for this code —
50.9 services per
1,000 Part B FFS beneficiaries in CY2022.
AZ · 62,411 svc
71 svc (lowest)median 7,820259,145 (highest)
Each tick is one state market's est. all-Medicare
services (scaled estimate)
for this code, CY2022, on a value axis — the 50 states and DC;
overseas territories are excluded. Rank counts from the highest
(#5 of 50 ≈ the 92nd percentile).
Where each group on this page sits nationally within its specialty renders
on its drill-down.
Market position
ShrinkingFlatGrowing
LowMidHigh
volume →
Arizona
is a high-volume, shrinking
market for this code —
#31 of 49 state markets
by 5-year growth, #5 of 50
by est. all-Medicare services.
5-yr change -20.2%CAGR (avg. yearly growth) -1.9%/yrvolume #5 of 50growth #31 of 49
Volume bands are terciles among all state markets
for this search, CY2018–CY2022; growth bands are this
market's own 5-year change (±2%). Excludes only a code's
partial introduction year.
Medicare Advantage covers 51% of Arizona’s Medicare beneficiaries.
Medicare Advantage penetration 42% → 51% since 2020.
Largest parent organizations by disclosed enrollment
UnitedHealth Group, Inc.≥41%
Humana Inc.≥22%
Health Care Service Corporation≥9%
Shares are floors: each is that organization’s enrollment CMS discloses, against the 783,286 Medicare Advantage beneficiaries CMS counts in Arizona. CMS suppresses small plan×county cells, so every organization holds at least what is shown and may hold more — the first two are not separated by these figures, and the order is by disclosed enrollment, not by a measured rank.
Enrollment as of August 2026 (monthly file); beneficiary counts CY2025 (annual file).
Scaled from the observed floor by each state’s fee-for-service share
(FFS share as of 2022) —
scaled estimate — assumes MA utilization mirrors FFS; not an observation.
How we scale · Methods.
Average chargeThe average submitted charge per service — the amount billed, weighted across office and facility settings. Not the amount Medicare paid.
$320-2.4% vs 2021
per service, submitted list amounts — not payments · named-group basis, observed FFS
Average paymentThe average amount Medicare actually paid per service — after the deductible, coinsurance, and program adjustments — weighted across settings. Lower than the submitted charge.
$74-18.8% vs 2021
per service, Medicare paid amounts — not charges · all disclosed claims, observed FFS basis
Charge-to-payment ratioHow many times the average submitted charge is the average Medicare payment, per service. Both figures are named billing groups only, so the two sides describe the same market. Submitted charges are a billing convention and do not affect what Medicare pays.
4.1×+18.6% vs 2021
average list $320 vs average Medicare payment $77 per service · named-group basis
What they charge
Half the field lists between $234 and $307
$43–105
$105–168
$168–230
$230–292
$292–355
$355–417
$417–479
$479+
Submitted charges are provider-set list amounts, not payments · median $265 (named groups)
Every group, one dot34 billing groups · median $265
The same field as one dot per billing group: where the cluster sits, and how far the tail reaches
One dot per billing group, A9500 in AZ CY2022 —
average submitted charge per service, provider-set list amounts, not
payments. The axis caps near the 95th percentile so the cluster is
legible; groups beyond it draw at the cap in accent and are counted on
the chart.
Every named group in this market, placed by list charge against volume
This market’s groups, on one chart34 groups · bubble = services · the five largest are called out
One mark per physician group, A9500 in AZ CY2022 —
every mark carries its group name and figures on hover. Submitted charges
are provider-set list amounts, not payments.
Mesa is Arizona's largest named-group market for this service — drawn to scale
Where the market isbubble = services
15 of the top 16 billing cities mapped (99.8% of their named-group volume).
Leading city marketsthe map, as a list
1Mesa5,200$279
7 groups · median list charge
2Phoenix4,771$257
8 groups · median list charge
3Gilbert1,796$259
3 groups · median list charge
4Yuma1,600$278
4 groups · median list charge
5Glendale1,425$308
4 groups · median list charge
6Scottsdale1,272$371
4 groups · median list charge
7Chandler1,160$271
5 groups · median list charge
8Tucson726$262
3 groups · median list charge
9Surprise357$204
2 groups · median list charge
10Tempe223$168
2 groups · median list charge
11Flagstaff216$318
2 groups · median list charge
City grain — the group ranking lives below. 11 cities listed.
Each slice is a share of Medicare volume. The centre counts groups.
Cardiovascular Disease (Cardiology)68.3%
Interventional Cardiology21.2%
Cardiac Electrophysiology3.6%
Internal Medicine2.8%
Neurosurgery1.8%
Diagnostic Radiology0.9%
All other specialties (3)1.3%
Named groups listed here cover 58% of
AZ's disclosed Medicare-FFS services for A9500 — the
share column divides by all of it, so shares won't sum to 100% down this list.
How attribution works →
Physician groups ranked by A9500 services, highest first, CY2022. Every sort re-runs the search
across the whole market — these are the market's true top rows on this
measure, never a re-order of this page.
Recorded volume covers about 49% of this market's Medicare beneficiaries (2025), so the shares below are shares of the traditional-Medicare market.
32services0.1%Share of state*$271avg list$1,051Medicare $
Medicare $ counts
A9500 payments in the market each row names, CY2022;
avg list is that row's submitted charges per service on the same basis
— list amounts, not payments.
*Share of the state's published Medicare-FFS
services for the primary code, counted once per clinician. "St" is the state the volume was
billed from: a group appears in each state where its clinicians bill Medicare, with that
state's volume and share ("City" is the group's registered location). Group figures sum
clinicians affiliated with exactly one group; clinicians in several groups are listed in each
group's drill-down but not volume-attributed to any single group, so shares reflect
attributable volume. See Methods.
Comparing against an all-payer estimate?
These are exact counts from Medicare fee-for-service claims — roughly a
third to half of most procedure markets, depending on payer mix — and the
observed foundation every market figure here builds on. Market totals anchor
on a labeled all-Medicare estimate scaled from that foundation, with the
observed count shown beside it — Medicare only, never all-payer. Modeled
all-payer databases project every payer statistically and typically run
higher. Same market, different denominator.
How the numbers reconcile →
174 clinicians billed A9500
in AZ in CY2022 —
32,864 observed fee-for-service services.
Individual clinicians only; organizational billers are listed under
Provider groups.
Each slice is a share of clinicians billing this code. The centre counts clinicians.
Services and beneficiary-episodes are observed Medicare fee-for-service counts for A9500 billed by
each clinician in AZ, CY2022; avg list is submitted charges per service — list amounts, not payments.
Clinician×code rows under 11 beneficiaries are suppressed by CMS, so small billers are absent by
construction. See Methods.
Deep Dive
Codes the same organizations bill alongside
A9500, CY2022 — ranked by the share of a
code's billing groups that also bill A9500, highest first, and
limited to codes billed by 500 or more
organizations. Org-level
co-billing facts: the same organization billed both codes at supported
volume in the year. Co-billing reflects practice scope and equipment, not
clinical sequence. Methods →
Each slice is a share of the partner codes shown. The centre counts codes.
23% of the groups billing 93923 also bill A9500 (168 of 728) — much of this overlap comes from large multi-specialty organizations
Showing the 25 strongest of
381 co-billed codes that clear the
disclosure floors.
Pairs appear only at supported volume — an
organization counts on a code at 50+ attributable services
in the year,
and a pair appears at 11+ shared organizations. Absence here is not
evidence of absence. Methods →
A9500 is not priced under the Physician Fee
Schedule, so there is no schedule rate to compare against. Codes that pay
similarly cannot be listed.
More than
200 groups billed A9500 in
2022, so no comparison is drawn: this read is for codes with thin
adoption, where a same-state comparison set is small enough to be a
comparison rather than a census. The Provider groups tab lists the billers.
All columns, provider drill-down,
and the market analytics for 14 days — browse the top 100 groups per
query and export what you see to CSV. A paid plan opens the full ranked list. We'll email you a one-time sign-in link.