The structure and trend panels below are live for everyone — free to look at. The rank & score analytics, baskets, and export are the platform.
In California, 182 groups bill 99458 — 210,472 fee-for-service services, and volume is up 72.3% year over year.
The orienting line is free; the comparative synthesis — growth rank, concentration, and $/service against the national figure — unlocks with Platform.
182
210,472
49%
48%
+72.3%
~427,020 services
210,472 observed fee-for-service (49%) · ~216,548 estimated Medicare Advantage.
| Year | Services | Services per 1,000 Part B FFS beneficiaries | Medicare payments |
|---|---|---|---|
| 2020 (2020) (introduction year) | 13,386 | 4.6 | $477,131 |
| 2021 | 59,047 | 20.5 | $2,056,853 |
| 2022 | 158,134 | 55.5 | $5,261,962 |
| 2023 | 261,912 | 92.8 | $8,752,566 |
| 2024 | 451,295 | 159.8 | $14,858,290 |
CAGR 2021–2024: +97.0%/yr · CAGR excludes 2020 and the introduction year.
Rates are per 1,000 Part B fee-for-service beneficiaries in the market's geography. See Methods.
426 HHI (named-group grain, CY2024) · fragmented · top 5 hold 35% of named-group volume
List shares are of named-group volume; bar segments are of disclosed volume (named groups cover 47% of it — the hatched segment is the remainder, drawn per D-062).
Of volume attributable to named groups, independents account for 3%; hospital-affiliated 97%.
Disclosed setting mix: 97% office · 3% facility.
HHI trend: 2020: 852 · 2021: 588 · 2022: 966 · 2023: 305 · 2024: 475 (group rosters begin 2019)
Provider-setting count 2020 → 2024: 84 → 694 (+726%).
Named groups cover 47% of disclosed volume. CMS suppresses provider-code rows under 11 beneficiaries at the source; suppressed volume is excluded and cannot be estimated from this file. Volume shares describe the volume attributable to named groups; the coverage line above states how much of disclosed Medicare fee-for-service volume that is.
Where this market sits on volume and growth among all state markets, and its rank.
Where each group's volume sits nationally and within its specialty.
Every state market for this search, ranked by a published score: size, growth, fragmentation, below-expected volume. The cross-market compare view sits alongside.
Or just look at it: nuclear heart imaging (78452) in Arizona is open as a live example — the full paid view, real data.
View the live example →| # | Physician group locked column | City locked column | Specialty locked column | Providers locked column | 99458 svcs | Submitted charges locked column | Avg charge locked column | Medicare $ locked column | Share* locked column | Phone |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | CABRILLO CARDIOLOGY MEDICAL GROUP INC | OXNARD | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 9 | 34,720 | $3,472,000 | $100 | premium | 7.7% | (805) 351-8212 |
| 2 | INTERVENTIONAL PAIN SOLUTIONS PC | CHICO | ANESTHESIOLOGY | 8 | 14,224 | $1,135,486 | $80 | premium | 3.2% | (530) 343-4757 |
| 3 | RENAL CONSULTANTS MEDICAL GROUP | NEWHALL | NEPHROLOGY | 8 | 9,552 | $858,286 | $90 | premium | 2.1% | (661) 254-0193 |
| 4 | IMPERIAL VALLEY FAMILY CARE MEDICAL GROUP A P C | EL CENTRO | FAMILY PRACTICE | 23 | 8,995 | $589,497 | $66 | premium | 2.0% | (760) 353-6363 |
| 5 | PULMONARY MEDICAL CORPORATION | TARZANA | CRITICAL CARE (INTENSIVISTS) | 2 | 6,199 | $1,054,340 | $170 | premium | 1.4% | (818) 758-0020 |
*Share of the state's disclosed 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. Modeled all-payer databases project the remainder statistically; we publish the audited floor and label it as such. Same market, different denominator. How the numbers reconcile →