93970 — Ultrasound study of arm or leg veins with compression and maneuvers
608,118 observed fee-for-service (49%) · ~635,390 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; 2 states without payer-mix data excluded. 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 | 93970 svcs | Submitted charges | Avg charge | Medicare $ locked column | Share* | Phone |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | NEW YORK UNIVERSITY | NEW YORK | NY | DIAGNOSTIC RADIOLOGY | 5704 | 8,205 | $8,872,723 | $1,081 | premium | 5.9% | (212) 263-9700 |
| 2 | NORTHWESTERN MEDICAL FACULTY FOUNDATION | CHICAGO | IL | NURSE PRACTITIONER | 4339 | 5,252 | $3,304,080 | $629 | premium | 8.3% | — |
| 3 | SCRIPPS HEALTH | LA JOLLA | CA | PHYSICIAN ASSISTANT | 1431 | 4,177 | $1,412,835 | $338 | premium | 2.0% | (858) 455-9100 |
| 4 | HACKENSACK MERIDIAN HEALTH MEDICAL GROUP - SPECIALTY CARE PC | NEPTUNE | NJ | NURSE PRACTITIONER | 1878 | 3,244 | $1,282,538 | $395 | premium | 4.7% | (732) 362-3663 |
| 5 | SUTTER VALLEY MEDICAL FOUNDATION | SACRAMENTO | CA | DIAGNOSTIC RADIOLOGY | 2420 | 3,094 | $1,453,548 | $470 | premium | 1.5% | (916) 681-8852 |
| 6 | THE EMORY CLINIC INC | ATLANTA | GA | NURSE PRACTITIONER | 3484 | 3,083 | $776,820 | $252 | premium | 7.9% | (404) 778-7525 |
| 7 | INTERVENTIONAL PARTNERS PLLC | FRISCO | TX | PODIATRY | 93 | 3,004 | $1,660,131 | $553 | premium | 3.5% | (972) 712-4161 |
| 8 | ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI | NEW YORK | NY | PHYSICIAN ASSISTANT | 2818 | 2,982 | $1,483,764 | $498 | premium | 2.1% | (212) 241-4812 |
| 9 | STANFORD HEALTH CARE | STANFORD | CA | DIAGNOSTIC RADIOLOGY | 3039 | 2,788 | $1,107,776 | $397 | premium | 1.3% | (650) 723-4000 |
| 10 | RADIOLOGY ASSOCIATES OF NORTH TEXAS PA | FORT WORTH | TX | DIAGNOSTIC RADIOLOGY | 340 | 2,780 | $380,049 | $137 | premium | 3.2% | (817) 321-0470 |
| 11 | BAPTIST HEALTH MEDICAL GROUP INC | LOUISVILLE | KY | NURSE PRACTITIONER | 2448 | 2,637 | $249,918 | $95 | premium | 22.7% | (502) 928-1050 |
| 12 | MONTEFIORE MEDICAL CENTER | BRONX | NY | PHYSICAL THERAPIST IN PRIVATE PRACTICE | 2796 | 2,577 | $2,280,263 | $885 | premium | 1.9% | (866) 633-8255 |
| 13 | RIVERSIDE RADIOLOGY AND INTERVENTIONAL ASSOCIATES INC | COLUMBUS | OH | DIAGNOSTIC RADIOLOGY | 243 | 2,557 | $647,191 | $253 | premium | 7.0% | (614) 566-5600 |
| 14 | WASHINGTON UNIVERSITY | SAINT LOUIS | MO | NURSE PRACTITIONER | 3070 | 2,545 | $600,910 | $236 | premium | 12.2% | (314) 747-3000 |
| 15 | STONY BROOK SURGICAL ASSOCIATES UNIVERSITY FACULTY PRACTICE CORPORATI | HAMPTON BAYS | NY | GENERAL SURGERY | 102 | 2,536 | $1,061,309 | $418 | premium | 1.8% | (631) 723-5000 |
| 16 | MORI BEAN AND BROOKS INC | ORANGE PARK | FL | DIAGNOSTIC RADIOLOGY | 947 | 2,474 | $839,100 | $339 | premium | 2.0% | (904) 399-5550 |
| 17 | CHARLOTTE RADIOLOGY PA | CHARLOTTE | NC | DIAGNOSTIC RADIOLOGY | 218 | 2,421 | $599,865 | $248 | premium | 7.3% | (704) 362-1945 |
| 18 | CENTER FOR VEIN RESTORATION MD LLC | SILVER SPRING | MD | EMERGENCY MEDICINE | 29 | 2,393 | $1,431,640 | $598 | premium | 5.5% | (855) 830-8346 |
| 19 | CARDIOTHORACIC AND VASCULAR SURGICAL ASSOCIATES PA | JACKSONVILLE | FL | PHYSICIAN ASSISTANT | 89 | 2,300 | $1,659,102 | $721 | premium | 1.9% | (904) 398-3888 |
| 20 | REGENTS OF THE UNIVERSITY OF CALIFORNIA | SAN DIEGO | CA | DIAGNOSTIC RADIOLOGY | 2057 | 2,291 | $742,039 | $324 | premium | 1.1% | (800) 926-8273 |
| 21 | ENDEAVOR HEALTH MEDICAL GROUP | EVANSTON | IL | NURSE PRACTITIONER | 3380 | 2,246 | $300,158 | $134 | premium | 3.5% | — |
| 22 | GEISINGER CLINIC | DANVILLE | PA | PHYSICIAN ASSISTANT | 3426 | 2,240 | $489,660 | $219 | premium | 4.7% | (570) 271-6144 |
| 23 | NORTH SHORE-LIJ MEDICAL PC | MANHASSET | NY | PHYSICIAN ASSISTANT | 6294 | 2,195 | $1,291,460 | $588 | premium | 1.6% | — |
| 24 | ZWANGER AND PESIRI RADIOLOGY GROUP LLP | LINDENHURST | NY | DIAGNOSTIC RADIOLOGY | 91 | 2,167 | $1,307,526 | $603 | premium | 1.6% | (631) 225-7200 |
| 25 | REGENTS OF THE UNIVERSITY OF MICHIGAN | ANN ARBOR | MI | INTERNAL MEDICINE | 3330 | 2,166 | $585,223 | $270 | premium | 6.2% | (734) 763-5459 |
| 26 | CLEVELAND CLINIC | CLEVELAND | OH | PHYSICIAN ASSISTANT | 6828 | 2,135 | $635,900 | $298 | premium | 5.8% | — |
| 27 | HOUSTON RADIOLOGY ASSOCIATED | HOUSTON | TX | DIAGNOSTIC RADIOLOGY | 103 | 2,133 | $569,426 | $267 | premium | 2.5% | (281) 206-9020 |
| 28 | ADVANCED RADIOLOGY P A | BALTIMORE | MD | DIAGNOSTIC RADIOLOGY | 161 | 2,051 | $306,712 | $150 | premium | 4.7% | (888) 972-9700 |
| 29 | SOUTHERN CONNECTICUT VASCULAR CENTER LLC | STRATFORD | CT | VASCULAR SURGERY | 36 | 2,035 | $1,386,136 | $681 | premium | 12.4% | (203) 210-6340 |
| 30 | MAYO CLINIC | ROCHESTER | MN | NURSE PRACTITIONER | 4896 | 1,994 | $1,056,710 | $530 | premium | 11.6% | (507) 284-2511 |
| 31 | MASSACHUSETTS GENERAL PHYSICIANS ORGANIZATION INC | BOSTON | MA | DIAGNOSTIC RADIOLOGY | 3532 | 1,967 | $635,352 | $323 | premium | 8.7% | (617) 724-0287 |
| 32 | KINGS PHYSICIAN SERVICES PC | BROOKLYN | FL | PHYSICIAN ASSISTANT | 664 | 1,938 | $265,506 | $137 | premium | 1.6% | — |
| 33 | DIGNITY HEALTH MEDICAL FOUNDATION | FOLSOM | CA | DIAGNOSTIC RADIOLOGY | 1197 | 1,934 | $483,512 | $250 | premium | 0.9% | (916) 983-7476 |
| 34 | BRIGHAM AND WOMENS PHYSICIANS ORGANIZATION INC | BOSTON | MA | PHYSICIAN ASSISTANT | 2942 | 1,926 | $396,041 | $206 | premium | 8.5% | (617) 732-5500 |
| 35 | TENET FLORIDA PHYSICIAN SERVICES LLC | DELRAY BEACH | FL | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 224 | 1,876 | $1,290,289 | $688 | premium | 1.5% | (561) 498-4440 |
| 36 | USC CARE MEDICAL GROUP INC | LOS ANGELES | CA | DIAGNOSTIC RADIOLOGY | 1374 | 1,838 | $390,180 | $212 | premium | 0.9% | (800) 872-2273 |
| 37 | HENRY FORD HEALTH SYSTEM | DETROIT | MI | PHYSICIAN ASSISTANT | 2536 | 1,836 | $198,160 | $108 | premium | 5.2% | (313) 916-2600 |
| 38 | PIEDMONT CARDIOLOGY OF ATLANTA, LLC | ATLANTA | GA | PHYSICIAN ASSISTANT | 477 | 1,786 | $418,168 | $234 | premium | 4.6% | (404) 605-5000 |
| 39 | MAYO CLINIC ARIZONA | PHOENIX | AZ | PHYSICIAN ASSISTANT | 1635 | 1,769 | $823,291 | $465 | premium | 4.5% | (800) 603-0558 |
| 40 | TRUST CARE MEDICAL CENTER INC | BURBANK | CA | NURSE PRACTITIONER | 2 | 1,748 | $412,528 | $236 | premium | 0.8% | (818) 821-3535 |
| 41 | VASCULAR SURGERY ASSOCIATES LLC | TOWSON | MD | VASCULAR SURGERY | 15 | 1,674 | $655,175 | $391 | premium | 3.9% | (410) 825-4928 |
| 42 | QUANTUM RADIOLOGY PC | MARIETTA | GA | DIAGNOSTIC RADIOLOGY | 104 | 1,646 | $269,944 | $164 | premium | 4.2% | (770) 732-4000 |
| 43 | TMH PHYSICIAN ASSOCIATES PLLC | HOUSTON | TX | NURSE PRACTITIONER | 1930 | 1,534 | $239,460 | $156 | premium | 1.8% | (713) 266-9955 |
| 44 | CENTER FOR ADVANCED CARDIAC AND VASCULAR INTERVENTIONS | TARZANA | CA | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 11 | 1,494 | $1,007,750 | $675 | premium | 0.7% | (818) 905-5904 |
| 45 | CHRISTIANA CARE HEALTH SERVICES INC | NEWARK | DE | PHYSICIAN ASSISTANT | 1537 | 1,489 | $939,237 | $631 | premium | 35.5% | — |
| 46 | ADVANCED RADIOLOGY SERVICES PC | GRAND RAPIDS | MI | DIAGNOSTIC RADIOLOGY | 249 | 1,476 | $153,542 | $104 | premium | 4.2% | (616) 363-7272 |
| 47 | MAYO CLINIC JACKSONVILLE | JACKSONVILLE | FL | NURSE PRACTITIONER | 1587 | 1,440 | $1,100,261 | $764 | premium | 1.2% | (904) 953-2000 |
| 48 | WAZNI PLLC | TAMPA | FL | GENERAL SURGERY | 30 | 1,424 | $553,545 | $389 | premium | 1.2% | (800) 991-6117 |
| 49 | UNIVERSITY OF PENN - MEDICAL GROUP | PHILADELPHIA | PA | PHYSICIAN ASSISTANT | 3505 | 1,414 | $162,112 | $115 | premium | 3.0% | (215) 662-2777 |
| 50 | NORTHEAST GEORGIA PHYSICIANS GROUP INC | GAINESVILLE | GA | PHYSICIAN ASSISTANT | 901 | 1,402 | $119,621 | $85 | premium | 3.6% | (770) 219-7777 |
| 51 | ORLANDO HEALTH MEDICAL GROUP INC | ORLANDO | FL | PHYSICIAN ASSISTANT | 2145 | 1,389 | $540,335 | $389 | premium | 1.1% | (407) 896-1100 |
| 52 | RADIOLOGY PHYSICIANS INC | DAYTON | OH | DIAGNOSTIC RADIOLOGY | 61 | 1,370 | $229,664 | $168 | premium | 3.7% | (937) 208-8000 |
| 53 | BARNABAS HEALTH MEDICAL GROUP PC | LIVINGSTON | NJ | NURSE PRACTITIONER | 990 | 1,356 | $731,427 | $539 | premium | 2.0% | — |
| 54 | MUSC COMMUNITY PHYSICIANS | ORANGEBURG | SC | NURSE PRACTITIONER | 1307 | 1,287 | $626,599 | $487 | premium | 7.3% | (803) 395-3400 |
| 55 | EASTERN RADIOLOGISTS INC | GREENVILLE | NC | DIAGNOSTIC RADIOLOGY | 93 | 1,270 | $139,190 | $110 | premium | 3.8% | (252) 752-5000 |
| 56 | BASS MEDICAL GROUP | WALNUT CREEK | CA | OTOLARYNGOLOGY | 318 | 1,248 | $967,787 | $775 | premium | 0.6% | — |
| 57 | CEDARS-SINAI MEDICAL CARE FOUNDATION | LOS ANGELES | CA | PHYSICIAN ASSISTANT | 1699 | 1,244 | $432,376 | $348 | premium | 0.6% | (310) 423-0674 |
| 58 | WELLSPAN MEDICAL GROUP | YORK | PA | PHYSICIAN ASSISTANT | 2312 | 1,241 | $123,262 | $99 | premium | 2.6% | — |
| 59 | OSU SURGERY, LLC | COLUMBUS | OH | PHYSICIAN ASSISTANT | 204 | 1,224 | $267,883 | $219 | premium | 3.3% | (614) 293-2101 |
| 60 | PRISMA HEALTH UNIVERSITY MEDICAL GROUP | GREENVILLE | SC | NURSE PRACTITIONER | 2447 | 1,218 | $116,928 | $96 | premium | 6.9% | — |
| 61 | COMMUNITY MEDICAL ASSOCIATES INC | LOUISVILLE | KY | NURSE PRACTITIONER | 1377 | 1,218 | $144,309 | $118 | premium | 10.5% | (502) 937-2209 |
| 62 | NORTHSIDE RADIOLOGY ASSOCIATES LLC | ATLANTA | GA | DIAGNOSTIC RADIOLOGY | 370 | 1,215 | $755,730 | $622 | premium | 3.1% | (404) 851-6577 |
| 63 | UNIVERSITY HEALTH SYSTEM, INC. | KNOXVILLE | TN | NURSE PRACTITIONER | 561 | 1,213 | $115,616 | $95 | premium | 4.6% | (865) 305-6333 |
| 64 | PHYSICIANS REFERRAL SERVICE | HOUSTON | TX | NURSE PRACTITIONER | 2696 | 1,198 | $554,174 | $463 | premium | 1.4% | (713) 592-5433 |
| 65 | PROMEDICA MULTI SPECIALTY PHYSICIANS | TOLEDO | OH | NURSE PRACTITIONER | 250 | 1,197 | $134,064 | $112 | premium | 3.3% | (419) 291-1111 |
| 66 | VASCULAR ASSOCIATES OF SARASOTA | SARASOTA | FL | VASCULAR SURGERY | 13 | 1,192 | $218,109 | $183 | premium | 1.0% | (941) 371-6565 |
| 67 | RUTGERS HEALTH-RWJ NEUROSURGERY FACULTY | NEW BRUNSWICK | NJ | PHYSICIAN ASSISTANT | 192 | 1,190 | $246,330 | $207 | premium | 1.7% | (732) 828-3000 |
| 68 | IHC HEALTH SERVICES INC | MURRAY | UT | PHYSICIAN ASSISTANT | 3944 | 1,177 | $301,499 | $256 | premium | 26.9% | (801) 261-8346 |
| 69 | CHRISTUS TRINITY CLINIC | TYLER | TX | NURSE PRACTITIONER | 1495 | 1,170 | $306,166 | $262 | premium | 1.4% | (903) 606-5560 |
| 70 | TRI-CITY CARDIOLOGY CONSULTANTS PC | MESA | AZ | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 41 | 1,165 | $357,319 | $307 | premium | 3.0% | (480) 835-6100 |
| 71 | THE ASSOCIATION OF UNIVERSITY PHYSICIANS | SEATTLE | WA | PHYSICIAN ASSISTANT | 3612 | 1,163 | $120,006 | $103 | premium | 7.3% | (206) 364-0500 |
| 72 | YALE UNIVERSITY | NEW HAVEN | CT | PHYSICIAN ASSISTANT | 2649 | 1,161 | $259,060 | $223 | premium | 7.1% | (203) 688-4242 |
| 73 | MMC UNIVERSITY VASCULAR SURGEONS | BROOKLYN | NY | VASCULAR SURGERY | 7 | 1,155 | $290,679 | $252 | premium | 0.8% | (718) 283-7966 |
| 74 | SCOTT AND WHITE CLINIC | TEMPLE | TX | PHYSICIAN ASSISTANT | 2435 | 1,151 | $240,623 | $209 | premium | 1.3% | (254) 724-2663 |
| 75 | DRS HARRIS BIRKHILL WANG SONGE AND ASSOC PC | DEARBORN | MI | DIAGNOSTIC RADIOLOGY | 62 | 1,140 | $114,000 | $100 | premium | 3.2% | (313) 593-7301 |
| 76 | ILLINOIS UVC MEDICAL PLLC | OAK LAWN | IL | GENERAL SURGERY | 11 | 1,097 | $543,574 | $496 | premium | 1.7% | (800) 991-6117 |
| 77 | MULTICARE HEALTH SYSTEM | GIG HARBOR | WA | NURSE PRACTITIONER | 2289 | 1,096 | $199,732 | $182 | premium | 6.9% | — |
| 78 | IHA HEALTH SERVICES CORPORATION | YPSILANTI | MI | PHYSICIAN ASSISTANT | 1144 | 1,093 | $110,155 | $101 | premium | 3.1% | — |
| 79 | VEIN SPECIALISTS AT ROYAL PALM SQUARE INC | FORT MYERS | FL | VASCULAR SURGERY | 5 | 1,091 | $518,225 | $475 | premium | 0.9% | (239) 694-8346 |
| 80 | BLACKWELL PHYSICIANS, LLC | ROCKVILLE | MD | DIAGNOSTIC RADIOLOGY | 67 | 1,087 | $183,319 | $169 | premium | 2.5% | (240) 826-6074 |
| 81 | UC REGENTS | ORANGE | CA | DIAGNOSTIC RADIOLOGY | 99 | 1,082 | $200,569 | $185 | premium | 0.5% | (714) 456-7004 |
| 82 | UNIVERSITY OF ALABAMA HEALTH SERVICES FOUNDATION, PC | BIRMINGHAM | AL | NURSE PRACTITIONER | 2788 | 1,080 | $274,050 | $254 | premium | 4.9% | (205) 934-3460 |
| 83 | FLORIDA HOSPITAL MEDICAL GROUP INC | MAITLAND | FL | PHYSICIAN ASSISTANT | 1634 | 1,060 | $189,112 | $178 | premium | 0.9% | (407) 200-2700 |
| 84 | THE REGENTS OF THE UNIVERSITY OF CALIFORNIA | LOS ANGELES | CA | VASCULAR SURGERY | 15 | 1,054 | $619,303 | $588 | premium | 0.5% | (310) 825-9111 |
| 85 | FRANCISCAN MEDICAL GROUP | TACOMA | WA | PHYSICIAN ASSISTANT | 1407 | 1,047 | $314,873 | $301 | premium | 6.6% | (253) 428-2200 |
| 86 | NEVADA HEART AND VASCULAR CENTER RESH LLP | LAS VEGAS | NV | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 42 | 1,042 | $533,847 | $512 | premium | 6.7% | (702) 240-6482 |
| 87 | MEMPHIS RADIOLOGICAL PC | MEMPHIS | TN | DIAGNOSTIC RADIOLOGY | 51 | 1,041 | $199,789 | $192 | premium | 4.0% | (901) 561-6000 |
| 88 | WEILL MEDICAL COLLEGE OF CORNELL | NEW YORK | NY | INTERNAL MEDICINE | 2053 | 1,040 | $901,555 | $867 | premium | 0.7% | (212) 746-5454 |
| 89 | MECKLENBURG RADIOLOGY ASSOCIATES PA | CHARLOTTE | NC | DIAGNOSTIC RADIOLOGY | 94 | 1,037 | $168,598 | $163 | premium | 3.1% | (704) 332-1291 |
| 90 | TEMPLE FACULTY PRACTICE PLAN INC | PHILADELPHIA | PA | PHYSICIAN ASSISTANT | 1330 | 1,031 | $123,926 | $120 | premium | 2.2% | — |
| 91 | UMASS MEMORIAL MEDICAL GROUP INC | WORCESTER | MA | PHYSICIAN ASSISTANT | 2483 | 1,027 | $185,839 | $181 | premium | 4.5% | (508) 334-1000 |
| 92 | VASCULAR AND INTERVENTIONAL SPECIALISTS OF ORANGE COUNTY, INC. | ORANGE | CA | GENERAL SURGERY | 8 | 1,026 | $158,985 | $155 | premium | 0.5% | (714) 560-4450 |
| 93 | BEAUMONT MEDICAL GROUP HOSPITAL BASED SERVICES | TROY | MI | DIAGNOSTIC RADIOLOGY | 583 | 1,023 | $418,742 | $409 | premium | 2.9% | (248) 964-1187 |
| 94 | RADIANT IMAGING INC | PASADENA | CA | DIAGNOSTIC RADIOLOGY | 67 | 1,021 | $372,742 | $365 | premium | 0.5% | (626) 229-8969 |
| 95 | RUSH UNIVERSITY MEDICAL GROUP | CHICAGO | IL | PHYSICIAN ASSISTANT | 1496 | 1,021 | $149,099 | $146 | premium | 1.6% | (312) 563-2875 |
| 96 | FLORIDA CLINICAL PRACTICE ASSOCIATION INC | GAINESVILLE | FL | NURSE PRACTITIONER | 1912 | 1,009 | $224,855 | $223 | premium | 0.8% | (352) 265-8990 |
| 97 | UNIVERSITY OF TEXAS SOUTHWESTERN MEDICAL CENTER AT DALLAS | DALLAS | TX | PHYSICIAN ASSISTANT | 3200 | 1,006 | $274,778 | $273 | premium | 1.2% | (214) 633-5555 |
| 98 | ARCH HEALTH PARTNERS INC | POWAY | CA | PHYSICIAN ASSISTANT | 161 | 982 | $447,451 | $456 | premium | 0.5% | (858) 485-0050 |
| 99 | OHH PHYSICIANS LLC | OKLAHOMA CITY | OK | INTERVENTIONAL CARDIOLOGY | 134 | 977 | $110,071 | $113 | premium | 9.3% | (405) 608-3800 |
| 100 | INTELLIRAD IMAGING LLC | MIAMI | FL | DIAGNOSTIC RADIOLOGY | 61 | 976 | $129,017 | $132 | premium | 0.8% | (305) 854-4400 |
Showing the top 100 of 2,566 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 →