AZ CY2020
Medicare Part B FFS · CY2020 · as published by CMSCY2020 volumes reflect the COVID-19 utilization drop — read this year as the pandemic dip, not a market change.
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.
See the full market analysis → · or start a trial- 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. ~71,771 all-Medicare services · est. (41,279 observed FFS). The #4 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 — 24,460 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; -10.8% over five years, #14 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 47% 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 $3.9M for A9500 in Arizona in 2020 (observed FFS payments) — $94.96 per service, 5% below the national $100.41.
Arizona ranks #4 of the 50 state markets by est. all-Medicare services for this code — 60.4 services per 1,000 Part B FFS beneficiaries in CY2020.
Each tick is one state market's est. all-Medicare services (scaled estimate) for this code, CY2020, on a value axis — the 50 states and DC; overseas territories are excluded. Rank counts from the highest (#4 of 50 ≈ the 94th percentile). Where each group on this page sits nationally within its specialty renders on its drill-down.
Arizona is a high-volume, shrinking market for this code — #14 of 49 state markets by 5-year growth, #4 of 50 by est. all-Medicare services.
~71,771 services
41,279 observed fee-for-service (58%) · ~30,492 estimated Medicare Advantage.
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).
$283
$95
3.0×
Half the field lists between $232 and $307
The same field as one dot per billing group: where the cluster sits, and how far the tail reaches
Every named group in this market, placed by list charge against volume
Mesa is Arizona's largest named-group market for this service — drawn to scale
Deep Dive
Each slice is a share of Medicare volume. The centre counts groups.
- Cardiovascular Disease (Cardiology)67.3%
- Interventional Cardiology17.0%
- Neurosurgery5.9%
- Hospitalist3.0%
- Internal Medicine2.7%
- Cardiac Electrophysiology2.3%
- All other specialties (3)1.7%
Physician groups ranked by A9500 services, highest first, CY2020. 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.
Medicare $ counts A9500 payments in the market each row names, CY2020; 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 →
Deep Dive
169 clinicians billed A9500 in AZ in CY2020 — 41,279 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.
- Cardiology62.1%
- Interventional Cardiology25.4%
- Diagnostic Radiology5.3%
- Clinical Cardiac Electrophysiology3.0%
- Internal Medicine1.8%
- Nuclear Medicine1.2%
- All other specialties (2)1.2%
Clinicians ranked by A9500 services, highest first, CY2020. Every sort re-runs the search across the whole market.
Showing the top 100 of 169 clinicians.
Services and beneficiary-episodes are observed Medicare fee-for-service counts for A9500 billed by each clinician in AZ, CY2020; 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, CY2020 — 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.
- External Electrocardiographic Monitoring24.0%
- Echocardiography (TTE/TEE)20.0%
- Electrocardiogram20.0%
- Duplex Scan - Extremity Arteries12.0%
- Duplex Scan - Extracranial Arteries4.0%
- Family not assigned4.0%
- All other families (4)16.0%
Showing the 25 strongest of 367 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 →
More than 200 groups billed A9500 in 2020, 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.