75574 — Ct scan of blood vessels and grafts of heart with contrast
93,188 observed fee-for-service (49%) · ~97,390 estimated Medicare Advantage. Scaled from the observed floor by each state’s fee-for-service share (FFS share as of 2024) — scaled estimate — assumes MA utilization mirrors FFS; not an observation. How we scale
Disclosed Medicare fee-for-service services by billing state; open a bar for that state's ranked market. Average submitted charge / service by billing state, among the highest-volume states; open a bar for that state's ranked market.
- Market position — where this market sits on volume and growth among all state markets, and its rank.
- Worth a look — every state market for this search, ranked by a published score: size, growth, fragmentation, below-expected volume.
- Lookalike opportunities — groups billing below what peers of the same specialty, size, and state predict, with the expected figure shown.
- National benchmarks — where each group's volume sits nationally and within its specialty.
- Market structure — how concentrated this market is, and who owns the volume.
- Medicare-wide scaling — the exact payer split, and this market total scaled to all of Medicare, labeled as an estimate.
Nevvi's market analytics platform — code baskets, market structure and share, the twelve-year trend layer — is built and not launched yet. We're gathering interest in it.
Notify me at launch →| # | Physician group | City | St | Specialty | Providers | 75574 svcs | Submitted charges | Avg charge | Medicare $ locked column | Share* | Phone |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | NEW YORK UNIVERSITY | NEW YORK | NY | DIAGNOSTIC RADIOLOGY | 5704 | 3,115 | $4,030,980 | $1,294 | premium | 15.7% | (212) 263-9700 |
| 2 | CEDARS-SINAI MEDICAL CENTER | WEST HOLLYWOOD | CA | NURSE PRACTITIONER | 802 | 2,366 | $1,478,750 | $625 | premium | 10.1% | (310) 423-3277 |
| 3 | HEALTHTEXAS PROVIDER NETWORK | DALLAS | TX | PHYSICIAN ASSISTANT | 2482 | 2,054 | $834,376 | $406 | premium | 12.6% | — |
| 4 | MASSACHUSETTS GENERAL PHYSICIANS ORGANIZATION INC | BOSTON | MA | DIAGNOSTIC RADIOLOGY | 3532 | 1,930 | $1,126,871 | $584 | premium | 37.5% | (617) 724-0287 |
| 5 | ZWANGER AND PESIRI RADIOLOGY GROUP LLP | LINDENHURST | NY | DIAGNOSTIC RADIOLOGY | 91 | 1,685 | $2,590,108 | $1,537 | premium | 8.5% | (631) 225-7200 |
| 6 | DIAGNOSTIC CENTERS OF AMERICA, LLP | BOYNTON BEACH | FL | DIAGNOSTIC RADIOLOGY | 103 | 1,444 | $2,806,134 | $1,943 | premium | 7.7% | (561) 496-6935 |
| 7 | PALM DESERT RADIOLOGY MEDICAL GROUP INC | RANCHO MIRAGE | CA | DIAGNOSTIC RADIOLOGY | 125 | 1,294 | $1,064,354 | $823 | premium | 5.5% | (760) 773-1251 |
| 8 | ENDEAVOR HEALTH MEDICAL GROUP | EVANSTON | IL | NURSE PRACTITIONER | 3380 | 1,256 | $699,371 | $557 | premium | 13.3% | — |
| 9 | PRACTICE ASSOCIATES MEDICAL GROUP | MORRISTOWN | NJ | NURSE PRACTITIONER | 1404 | 1,229 | $479,310 | $390 | premium | 18.3% | (973) 971-5596 |
| 10 | RADIOLOGY REGIONAL CENTER P A | FORT MYERS | FL | DIAGNOSTIC RADIOLOGY | 52 | 1,164 | $1,080,330 | $928 | premium | 6.2% | (239) 936-2316 |
| 11 | NORTHWESTERN MEDICAL FACULTY FOUNDATION | CHICAGO | IL | NURSE PRACTITIONER | 4339 | 1,059 | $635,025 | $600 | premium | 11.2% | — |
| 12 | RADIOLOGY ASSOCIATES OF NORTH TEXAS PA | FORT WORTH | TX | DIAGNOSTIC RADIOLOGY | 340 | 975 | $453,349 | $465 | premium | 6.0% | (817) 321-0470 |
| 13 | PIEDMONT CARDIOLOGY OF ATLANTA, LLC | ATLANTA | GA | PHYSICIAN ASSISTANT | 477 | 826 | $415,742 | $503 | premium | 14.3% | (404) 605-5000 |
| 14 | CAROLINAS PHYSICIANS NETWORK INC | CHARLOTTE | NC | PHYSICIAN ASSISTANT | 2360 | 818 | $731,721 | $895 | premium | 14.7% | (704) 667-1000 |
| 15 | STANFORD HEALTH CARE | STANFORD | CA | DIAGNOSTIC RADIOLOGY | 3039 | 806 | $749,580 | $930 | premium | 3.5% | (650) 723-4000 |
| 16 | MAYO CLINIC JACKSONVILLE | JACKSONVILLE | FL | NURSE PRACTITIONER | 1587 | 795 | $2,148,838 | $2,703 | premium | 4.2% | (904) 953-2000 |
| 17 | BEAUMONT MEDICAL GROUP- SPECIALTY SERVICES | ROYAL OAK | MI | PHYSICIAN ASSISTANT | 833 | 773 | $479,654 | $621 | premium | 21.3% | (248) 898-5058 |
| 18 | HENDRICK PROVIDER NETWORK | ABILENE | TX | PHYSICIAN ASSISTANT | 249 | 763 | $248,738 | $326 | premium | 4.7% | (325) 672-4372 |
| 19 | SCRIPPS HEALTH | LA JOLLA | CA | PHYSICIAN ASSISTANT | 1431 | 761 | $1,190,012 | $1,564 | premium | 3.3% | (858) 455-9100 |
| 20 | THE EMORY CLINIC INC | ATLANTA | GA | NURSE PRACTITIONER | 3484 | 663 | $352,141 | $531 | premium | 11.5% | (404) 778-7525 |
| 21 | ADVOCATE HEALTH AND HOSPITALS CORPORATION | BUFFALO GROVE | IL | NURSE PRACTITIONER | 3045 | 649 | $257,210 | $396 | premium | 6.9% | (847) 459-1160 |
| 22 | BAPTIST HEALTH | LITTLE ROCK | AR | NURSE PRACTITIONER | 106 | 644 | $158,941 | $247 | premium | 36.6% | (501) 227-7596 |
| 23 | HH HEART CENTER, LLC | HUNTSVILLE | AL | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 90 | 642 | $357,650 | $557 | premium | 25.9% | (256) 265-2372 |
| 24 | SUTTER BAY MEDICAL FOUNDATION | PALO ALTO | CA | INTERNAL MEDICINE | 3716 | 620 | $710,726 | $1,146 | premium | 2.7% | (415) 600-1020 |
| 25 | QUANTUM RADIOLOGY PC | MARIETTA | GA | DIAGNOSTIC RADIOLOGY | 104 | 597 | $328,350 | $550 | premium | 10.3% | (770) 732-4000 |
| 26 | CARDIOLOGY ASSOCIATES OF MOBILE INC | MOBILE | AL | PHYSICIAN ASSISTANT | 52 | 576 | $603,082 | $1,047 | premium | 23.3% | (251) 460-0078 |
| 27 | ST DAVIDS HEART AND VASCULAR PLLC | AUSTIN | TX | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 199 | 561 | $201,348 | $359 | premium | 3.5% | (512) 899-2028 |
| 28 | HEALTHTEXAS PROVIDER NETWORK | DALLAS | AZ | PHYSICIAN ASSISTANT | 2482 | 550 | $223,421 | $406 | premium | 10.2% | — |
| 29 | SDMI, LLC | LAS VEGAS | NV | DIAGNOSTIC RADIOLOGY | 36 | 529 | $581,900 | $1,100 | premium | 23.0% | (702) 732-6000 |
| 30 | CHICAGO CARDIOLOGY INSTITUTE SC | SCHAUMBURG | IL | NURSE PRACTITIONER | 22 | 516 | $456,660 | $885 | premium | 5.5% | (847) 605-9500 |
| 31 | SUTTER VALLEY MEDICAL FOUNDATION | SACRAMENTO | CA | DIAGNOSTIC RADIOLOGY | 2420 | 513 | $919,281 | $1,792 | premium | 2.2% | (916) 681-8852 |
| 32 | SAINT THOMAS MEDICAL PARTNERS | NASHVILLE | TN | NURSE PRACTITIONER | 591 | 510 | $122,910 | $241 | premium | 8.1% | (615) 269-4545 |
| 33 | EVANSVILLE RADIOLOGY PC | EVANSVILLE | IN | DIAGNOSTIC RADIOLOGY | 29 | 509 | $173,569 | $341 | premium | 17.7% | (812) 422-3254 |
| 34 | OHIOHEALTH CORPORATION | COLUMBUS | OH | PHYSICIAN ASSISTANT | 2282 | 503 | $121,300 | $241 | premium | 8.3% | — |
| 35 | ORLANDO HEALTH MEDICAL GROUP INC | ORLANDO | FL | PHYSICIAN ASSISTANT | 2145 | 497 | $260,990 | $525 | premium | 2.6% | (407) 896-1100 |
| 36 | CARDIOVASCULAR MEDICAL GROUP OF SOUTHERN CALIFORNIA | BEVERLY HILLS | CA | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 11 | 463 | $394,200 | $851 | premium | 2.0% | (310) 278-3400 |
| 37 | BRIGHAM AND WOMENS PHYSICIANS ORGANIZATION INC | BOSTON | MA | PHYSICIAN ASSISTANT | 2942 | 456 | $225,652 | $495 | premium | 8.9% | (617) 732-5500 |
| 38 | REGENTS OF THE UNIVERSITY OF CALIFORNIA | SAN DIEGO | CA | DIAGNOSTIC RADIOLOGY | 2057 | 426 | $331,947 | $779 | premium | 1.8% | (800) 926-8273 |
| 39 | HOUSTON RADIOLOGY ASSOCIATED | HOUSTON | TX | DIAGNOSTIC RADIOLOGY | 103 | 424 | $296,820 | $700 | premium | 2.6% | (281) 206-9020 |
| 40 | THE MOSES H CONE MEMORIAL HOSPITAL OPERATING CORPORATION | GREENSBORO | NC | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 722 | 409 | $176,683 | $432 | premium | 7.3% | (336) 832-7000 |
| 41 | TOLEDO RADIOLOGICAL ASSOCIATES INC | COLDWATER | OH | DIAGNOSTIC RADIOLOGY | 51 | 403 | $139,841 | $347 | premium | 6.7% | (517) 279-5400 |
| 42 | ALLINA HEALTH SYSTEM | MINNEAPOLIS | MN | PHYSICIAN ASSISTANT | 3855 | 391 | $206,252 | $527 | premium | 9.2% | (612) 863-4000 |
| 43 | BLACKWELL PHYSICIANS, LLC | ROCKVILLE | MD | DIAGNOSTIC RADIOLOGY | 67 | 385 | $550,727 | $1,430 | premium | 8.4% | (240) 826-6074 |
| 44 | ALEXIAN BROTHERS SPECIALTY GROUP | ELK GROVE VILLAGE | IL | NURSE PRACTITIONER | 44 | 384 | $94,564 | $246 | premium | 4.1% | (847) 437-5500 |
| 45 | HOUSTON RADIOLOGY ASSOCIATED | HOUSTON | SC | DIAGNOSTIC RADIOLOGY | 103 | 383 | $267,070 | $697 | premium | 9.4% | (281) 206-9020 |
| 46 | MORI BEAN AND BROOKS INC | ORANGE PARK | FL | DIAGNOSTIC RADIOLOGY | 947 | 382 | $376,592 | $986 | premium | 2.0% | (904) 399-5550 |
| 47 | WELLMONT CARDIOLOGY SERVICES | KINGSPORT | TN | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 138 | 378 | $99,834 | $264 | premium | 6.0% | (423) 230-5000 |
| 48 | CHRISTUS TRINITY CLINIC | TYLER | TX | NURSE PRACTITIONER | 1495 | 377 | $183,287 | $486 | premium | 2.3% | (903) 606-5560 |
| 49 | STONY BROOK RADIOLOGY, UNIVERSITY FACULTY PRACTICE CORPORATION | STONY BROOK | NY | DIAGNOSTIC RADIOLOGY | 59 | 375 | $351,330 | $937 | premium | 1.9% | (631) 638-2121 |
| 50 | YALE UNIVERSITY | NEW HAVEN | CT | PHYSICIAN ASSISTANT | 2649 | 373 | $188,365 | $505 | premium | 32.4% | (203) 688-4242 |
| 51 | APEX CARDIOLOGY CONSULTANTS | INGLEWOOD | CA | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 8 | 353 | $745,536 | $2,112 | premium | 1.5% | (310) 672-3900 |
| 52 | SUTTER VALLEY MEDICAL FOUNDATION | SACRAMENTO | NY | DIAGNOSTIC RADIOLOGY | 2420 | 351 | $706,524 | $2,013 | premium | 1.8% | (916) 681-8852 |
| 53 | ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI | MINEOLA | NY | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 18 | 351 | $490,910 | $1,399 | premium | 1.8% | (516) 877-0977 |
| 54 | NORTH CAROLINA MG LLC | RALEIGH | NC | PHYSICIAN ASSISTANT | 674 | 348 | $133,284 | $383 | premium | 6.2% | (919) 881-0160 |
| 55 | CHARLESTON AREA MEDICAL CENTER INC | CHARLESTON | WV | NURSE PRACTITIONER | 970 | 343 | $124,509 | $363 | premium | 30.6% | (304) 388-5432 |
| 56 | RADIOLOGY ASSOCIATES OF VENICE AND ENGLEWOOD PA | VENICE | FL | DIAGNOSTIC RADIOLOGY | 8 | 341 | $191,607 | $562 | premium | 1.8% | (941) 486-3483 |
| 57 | NORTH METROPOLITAN RADIOLOGY ASSOCIATES LLP | LAWRENCEVILLE | GA | DIAGNOSTIC RADIOLOGY | 44 | 340 | $206,380 | $607 | premium | 5.9% | (678) 312-0900 |
| 58 | NEW YORK UNIVERSITY | NEW YORK | TN | DIAGNOSTIC RADIOLOGY | 5704 | 340 | $455,290 | $1,339 | premium | 5.4% | (212) 263-9700 |
| 59 | DUKE HEALTH INTEGRATED PRACTICE INC | DURHAM | NC | PHYSICIAN ASSISTANT | 3051 | 334 | $142,841 | $428 | premium | 6.0% | (919) 684-8111 |
| 60 | FLORIDA RADIOLOGY CONSULTANTS P A | FORT MYERS | TN | DIAGNOSTIC RADIOLOGY | 67 | 334 | $135,604 | $406 | premium | 5.3% | (239) 938-3571 |
| 61 | NORTHSIDE RADIOLOGY ASSOCIATES LLC | ATLANTA | GA | DIAGNOSTIC RADIOLOGY | 370 | 331 | $711,650 | $2,150 | premium | 5.7% | (404) 851-6577 |
| 62 | POUDRE VALLEY MEDICAL GROUP LLC | COLORADO SPRINGS | CO | PHYSICIAN ASSISTANT | 2390 | 320 | $136,000 | $425 | premium | 12.2% | — |
| 63 | MECKLENBURG RADIOLOGY ASSOCIATES PA | CHARLOTTE | NC | DIAGNOSTIC RADIOLOGY | 94 | 317 | $105,561 | $333 | premium | 5.7% | (704) 332-1291 |
| 64 | MONTEFIORE MEDICAL CENTER | BRONX | NY | PHYSICAL THERAPIST IN PRIVATE PRACTICE | 2796 | 317 | $394,665 | $1,245 | premium | 1.6% | (866) 633-8255 |
| 65 | RADIOLOGY ASSOCIATES OF NORTHERN KENTUCKY PLLC | EDGEWOOD | KY | DIAGNOSTIC RADIOLOGY | 56 | 317 | $90,662 | $286 | premium | 13.9% | (859) 301-2160 |
| 66 | HEART CARE CENTERS OF ILLINOIS, S.C. | PALOS PARK | IL | INTERVENTIONAL CARDIOLOGY | 38 | 312 | $715,669 | $2,294 | premium | 3.3% | — |
| 67 | HEALTH FIRST MEDICAL GROUP, LLC | MELBOURNE | FL | NURSE PRACTITIONER | 669 | 309 | $85,752 | $278 | premium | 1.6% | (321) 434-8878 |
| 68 | BAPTIST HEALTH MEDICAL GROUP INC | LOUISVILLE | KY | NURSE PRACTITIONER | 2448 | 306 | $68,238 | $223 | premium | 13.4% | (502) 928-1050 |
| 69 | MEMORIAL HEALTH CARE SYSTEM INC. | CHATTANOOGA | TN | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 56 | 304 | $102,752 | $338 | premium | 4.8% | (423) 697-2000 |
| 70 | EDISON RADIOLOGY GROUP PA JFK MEDICAL CENTER | EDISON | NJ | DIAGNOSTIC RADIOLOGY | 23 | 302 | $152,510 | $505 | premium | 4.5% | (732) 321-7540 |
| 71 | CARDIOVASCULAR ASSOCIATION, P.L.L.C. | HUMBLE | TX | INTERVENTIONAL CARDIOLOGY | 52 | 301 | $283,889 | $943 | premium | 1.9% | (281) 446-6656 |
| 72 | GEORGIA HEART INSTITUTE LLC | GAINESVILLE | GA | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 128 | 299 | $165,575 | $554 | premium | 5.2% | (770) 534-2020 |
| 73 | WELLSPAN MEDICAL GROUP | YORK | PA | PHYSICIAN ASSISTANT | 2312 | 291 | $68,385 | $235 | premium | 4.6% | — |
| 74 | NORTH BROWARD RADIOLOGISTS, P.A. | FORT LAUDERDALE | IL | DIAGNOSTIC RADIOLOGY | 23 | 290 | $135,430 | $467 | premium | 3.1% | (954) 262-1140 |
| 75 | CENTENNIAL HEART LLC | NASHVILLE | TN | NURSE PRACTITIONER | 121 | 288 | $100,794 | $350 | premium | 4.6% | (615) 515-1900 |
| 76 | MAYO CLINIC ARIZONA | PHOENIX | AZ | PHYSICIAN ASSISTANT | 1635 | 288 | $313,590 | $1,089 | premium | 5.3% | (800) 603-0558 |
| 77 | COMMUNITY MEDICAL ASSOCIATES INC | LOUISVILLE | KY | NURSE PRACTITIONER | 1377 | 288 | $110,880 | $385 | premium | 12.6% | (502) 937-2209 |
| 78 | MAIN STREET RADIOLOGY AT BAYSIDE LLC | FLUSHING | NY | DIAGNOSTIC RADIOLOGY | 55 | 287 | $491,659 | $1,713 | premium | 1.5% | (718) 428-1500 |
| 79 | LEE HEALTH SYSTEM INC | FORT MYERS | FL | NURSE PRACTITIONER | 1370 | 285 | $190,585 | $669 | premium | 1.5% | (239) 343-9888 |
| 80 | AHS OKLAHOMA HEART LLC | TULSA | OK | PHYSICIAN ASSISTANT | 136 | 280 | $106,400 | $380 | premium | 19.7% | (918) 592-0999 |
| 81 | ROPER RADIOLOGISTS PA | CHARLESTON | SC | DIAGNOSTIC RADIOLOGY | 40 | 276 | $321,745 | $1,166 | premium | 6.8% | (843) 724-2161 |
| 82 | VIRTUA MEDICAL GROUP, PA | VOORHEES | NJ | PHYSICIAN ASSISTANT | 1662 | 271 | $99,728 | $368 | premium | 4.0% | (856) 247-7260 |
| 83 | NEVADA HEART AND VASCULAR CENTER RESH LLP | LAS VEGAS | NV | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 42 | 269 | $420,019 | $1,561 | premium | 11.7% | (702) 240-6482 |
| 84 | REGIONAL MEDICAL IMAGING PC | FLINT | MI | DIAGNOSTIC RADIOLOGY | 22 | 269 | $140,260 | $521 | premium | 7.4% | (810) 732-8870 |
| 85 | MRI RADIOLOGY NETWORK PA | BOCA RATON | FL | DIAGNOSTIC RADIOLOGY | 2 | 268 | $418,080 | $1,560 | premium | 1.4% | (561) 826-1134 |
| 86 | MEDICAL ASSOCIATES OF ENGLEWOOD PC | ENGLEWOOD | NJ | INTERNAL MEDICINE | 550 | 267 | $104,130 | $390 | premium | 4.0% | (201) 894-3158 |
| 87 | BANNER-UNIVERSITY MEDICAL GROUP | TUCSON | AZ | INTERNAL MEDICINE | 1068 | 262 | $79,386 | $303 | premium | 4.8% | (520) 694-0111 |
| 88 | UC REGENTS | ORANGE | CA | DIAGNOSTIC RADIOLOGY | 99 | 258 | $134,160 | $520 | premium | 1.1% | (714) 456-7004 |
| 89 | IHC HEALTH SERVICES INC | MURRAY | UT | PHYSICIAN ASSISTANT | 3944 | 256 | $74,885 | $293 | premium | 51.9% | (801) 261-8346 |
| 90 | MEMPHIS RADIOLOGICAL PC | MEMPHIS | TN | DIAGNOSTIC RADIOLOGY | 51 | 256 | $134,400 | $525 | premium | 4.1% | (901) 561-6000 |
| 91 | RADIOLOGY ASSOCIATES OF RIDGEWOOD P A | WALDWICK | NJ | DIAGNOSTIC RADIOLOGY | 20 | 255 | $119,356 | $468 | premium | 3.8% | (201) 445-8822 |
| 92 | COMMUNITY HOSPITAL OF THE MONTEREY PENINSULA | MONTEREY | CA | EMERGENCY MEDICINE | 141 | 253 | $133,040 | $526 | premium | 1.1% | (831) 624-5311 |
| 93 | UNIVERSITY OF TEXAS SOUTHWESTERN MEDICAL CENTER AT DALLAS | DALLAS | TX | PHYSICIAN ASSISTANT | 3200 | 252 | $118,680 | $471 | premium | 1.6% | (214) 633-5555 |
| 94 | EAST RIVER MEDICAL IMAGING PC | NEW YORK | NY | DIAGNOSTIC RADIOLOGY | 10 | 251 | $374,700 | $1,493 | premium | 1.3% | (212) 288-7615 |
| 95 | MRI SCAN CENTER LLC | FORT LAUDERDALE | FL | DIAGNOSTIC RADIOLOGY | 4 | 250 | $305,302 | $1,221 | premium | 1.3% | (954) 772-8000 |
| 96 | LAREDO CARDIOVASCULAR CONSULTANTS,P.A. | LAREDO | TX | INTERNAL MEDICINE | 4 | 250 | $300,000 | $1,200 | premium | 1.5% | (956) 725-1228 |
| 97 | BARNABAS HEALTH MEDICAL GROUP PC | LIVINGSTON | NJ | NURSE PRACTITIONER | 990 | 249 | $202,632 | $814 | premium | 3.7% | — |
| 98 | MEMORIALCARE MEDICAL FOUNDATION | LONG BEACH | CA | FAMILY PRACTICE | 549 | 249 | $144,071 | $579 | premium | 1.1% | (562) 346-2222 |
| 99 | SMI IMAGING LLC | PHOENIX | AZ | DIAGNOSTIC RADIOLOGY | 364 | 248 | $353,299 | $1,425 | premium | 4.6% | (480) 753-6161 |
| 100 | TRISTAR TENNESSEE HEART AND VASCULAR LLC | HENDERSONVILLE | TN | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 22 | 248 | $85,664 | $345 | premium | 4.0% | (615) 824-0043 |
Showing the top 100 of 552 groups — the full ranking is part of the market analytics platform — built, not launched yet. Notify me at launch →
*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 →