93976 — Ultrasound of abdomen and pelvis artery and vein blood flow
36,946 observed fee-for-service (50%) · ~36,987 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; 1 state 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 | 93976 svcs | Submitted charges | Avg charge | Medicare $ locked column | Share* | Phone |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | MEDICAL CENTER RADIOLOGISTS INC | NORFOLK | VA | DIAGNOSTIC RADIOLOGY | 123 | 1,363 | $674,685 | $495 | premium | 35.9% | (757) 466-6870 |
| 2 | NORTH SHORE HEMATOLOGY ONCOLOGY ASSOCIATES PC | SMITHTOWN | NY | NURSE PRACTITIONER | 462 | 1,280 | $319,941 | $250 | premium | 9.1% | (631) 751-3000 |
| 3 | MORAN ROWEN AND DORSEY INC | ORANGE | CA | DIAGNOSTIC RADIOLOGY | 35 | 1,224 | $353,148 | $289 | premium | 9.0% | (714) 628-3305 |
| 4 | EZ TESTING MEDICAL DIAGNOSTIC PC | BROOKLYN | NY | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 4 | 844 | $247,460 | $293 | premium | 6.0% | (347) 462-9925 |
| 5 | MAYO CLINIC | ROCHESTER | MN | NURSE PRACTITIONER | 4896 | 810 | $826,764 | $1,021 | premium | 37.3% | (507) 284-2511 |
| 6 | CENTER FOR VASCULAR MEDICINE LLC | GREENBELT | MD | INTERNAL MEDICINE | 9 | 739 | $398,929 | $540 | premium | 39.4% | (301) 982-2000 |
| 7 | BEN B. SHENASSA, M.D. INC. | LOS ANGELES | CA | UROLOGY | 2 | 587 | $220,712 | $376 | premium | 4.3% | (818) 241-3125 |
| 8 | GENESIS HEALTHCARE PARTNERS PC | TORRANCE | CA | GASTROENTEROLOGY | 211 | 545 | $250,030 | $459 | premium | 4.0% | (310) 534-8400 |
| 9 | DR GREGORY SHIFRIN OB/GYN PC | BROOKLYN | NY | OBSTETRICS/GYNECOLOGY | 4 | 488 | $146,400 | $300 | premium | 3.5% | (718) 743-0505 |
| 10 | UNIVERSITY DIAGNOSTIC MEDICAL IMAGING PC | BRONX | NY | DIAGNOSTIC RADIOLOGY | 7 | 419 | $419,000 | $1,000 | premium | 3.0% | (718) 931-5620 |
| 11 | HAMPTON ROADS RADIOLOGY ASSOCIATES PC | VIRGINIA BEACH | VA | DIAGNOSTIC RADIOLOGY | 37 | 405 | $81,000 | $200 | premium | 10.7% | (757) 916-9630 |
| 12 | THE CENTERS FOR ADVANCED UROLOGY LLP | KING OF PRUSSIA | PA | UROLOGY | 145 | 396 | $198,000 | $500 | premium | 19.3% | (610) 579-3577 |
| 13 | MCH PROFESSIONAL CARE HOSPITAL BASED | ODESSA | TX | INTERNAL MEDICINE | 82 | 383 | $37,706 | $98 | premium | 8.7% | (432) 640-2401 |
| 14 | NEW YORK MEDICAL IMAGING ASSOCIATES MD PC | NEW YORK | NY | DIAGNOSTIC RADIOLOGY | 7 | 374 | $168,300 | $450 | premium | 2.7% | (212) 518-2901 |
| 15 | MAYO CLINIC ARIZONA | PHOENIX | AZ | PHYSICIAN ASSISTANT | 1635 | 345 | $261,050 | $757 | premium | 15.9% | (800) 603-0558 |
| 16 | HERA SAMBAZIOTIS MD MPH AND MARTINA FRANDINA MD, OBSTETRICS AND GYNECO | NEW HYDE PARK | NY | OBSTETRICS/GYNECOLOGY | 4 | 305 | $175,375 | $575 | premium | 2.2% | (516) 437-2020 |
| 17 | WELLSPAN MEDICAL GROUP | YORK | PA | PHYSICIAN ASSISTANT | 2312 | 282 | $38,914 | $138 | premium | 13.7% | — |
| 18 | OLEG KATCHER MD PC | STATEN ISLAND | NY | GASTROENTEROLOGY | 3 | 281 | $179,144 | $638 | premium | 2.0% | (718) 948-0221 |
| 19 | MAYO CLINIC JACKSONVILLE | JACKSONVILLE | FL | NURSE PRACTITIONER | 1587 | 271 | $374,894 | $1,383 | premium | 7.5% | (904) 953-2000 |
| 20 | MAVERICK COUNTY HOSPITAL DISTRICT | EAGLE PASS | TX | GENERAL SURGERY | 25 | 252 | $46,477 | $184 | premium | 5.7% | (830) 757-4900 |
| 21 | USC CARE MEDICAL GROUP INC | LOS ANGELES | CA | DIAGNOSTIC RADIOLOGY | 1374 | 247 | $60,062 | $243 | premium | 1.8% | (800) 872-2273 |
| 22 | MURRAY HILL UROLOGY PC | NEW YORK | NY | PATHOLOGY | 5 | 245 | $98,000 | $400 | premium | 1.7% | (212) 686-1140 |
| 23 | BANNER-UNIVERSITY MEDICAL GROUP | TUCSON | AZ | INTERNAL MEDICINE | 1068 | 245 | $25,048 | $102 | premium | 11.3% | (520) 694-0111 |
| 24 | CARDIOVASCULAR INTERVENTIONS PA | ORLANDO | FL | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 4 | 240 | $106,478 | $444 | premium | 6.6% | (407) 896-7899 |
| 25 | LAKELAND RADIOLOGISTS P A | FLOWOOD | MS | DIAGNOSTIC RADIOLOGY | 29 | 240 | $47,520 | $198 | premium | 31.2% | (601) 936-2390 |
| 26 | SUMMIT MEDICAL GROUP PA | BERKELEY HEIGHTS | NJ | PHYSICIAN ASSISTANT | 1183 | 239 | $125,475 | $525 | premium | 5.4% | (908) 273-4300 |
| 27 | ADVANCED IMAGING CENTER, INC. | LANCASTER | MN | DIAGNOSTIC RADIOLOGY | 8 | 236 | $246,530 | $1,045 | premium | 10.9% | (661) 949-8111 |
| 28 | VERDUGO MEDICAL CARE INC | BURBANK | CA | FAMILY PRACTICE | 2 | 236 | $43,660 | $185 | premium | 1.7% | (818) 861-7755 |
| 29 | NORTHWESTERN MEDICAL FACULTY FOUNDATION | CHICAGO | IL | NURSE PRACTITIONER | 4339 | 233 | $118,245 | $507 | premium | 6.3% | — |
| 30 | IGOR SERGEYEV MD PC | BROOKLYN | NY | PATHOLOGY | 2 | 225 | $171,050 | $760 | premium | 1.6% | (718) 680-0265 |
| 31 | RUSH UNIVERSITY MEDICAL GROUP | CHICAGO | IL | PHYSICIAN ASSISTANT | 1496 | 220 | $42,950 | $195 | premium | 6.0% | (312) 563-2875 |
| 32 | SUTTER BAY MEDICAL FOUNDATION | PALO ALTO | CA | INTERNAL MEDICINE | 3716 | 213 | $240,690 | $1,130 | premium | 1.6% | (415) 600-1020 |
| 33 | LIMA RADIOLOGICAL ASSOCIATES | LIMA | OH | DIAGNOSTIC RADIOLOGY | 47 | 211 | $51,273 | $243 | premium | 16.4% | (419) 226-9023 |
| 34 | ADVANCED MEDICAL IMAGING LLC | ROCK SPRINGS | WY | DIAGNOSTIC RADIOLOGY | 3 | 198 | $255,761 | $1,292 | premium | 81.8% | (786) 621-3900 |
| 35 | LIVER ASSOCIATES OF TEXAS, P.A. | HOUSTON | TX | GASTROENTEROLOGY | 3 | 197 | $82,580 | $419 | premium | 4.5% | 7137998300118 |
| 36 | SAN ANTONIO RADIOLOGICAL MEDICAL | UPLAND | CA | DIAGNOSTIC RADIOLOGY | 56 | 196 | $46,256 | $236 | premium | 1.4% | (909) 985-2811 |
| 37 | MEDICAL CENTER RADIOLOGISTS INC | NORFOLK | IL | DIAGNOSTIC RADIOLOGY | 123 | 195 | $96,525 | $495 | premium | 5.3% | (757) 466-6870 |
| 38 | ANCILLARY SERVICES OF PRACTICE ASSOCIATES PA | MORRISTOWN | NJ | DIAGNOSTIC RADIOLOGY | 97 | 193 | $28,779 | $149 | premium | 4.4% | (973) 971-6866 |
| 39 | VASCULAR INSTITUTE OF CHATTANOOGA, PLLC | CHATTANOOGA | TN | NURSE PRACTITIONER | 19 | 187 | $73,446 | $393 | premium | 7.5% | (423) 602-2750 |
| 40 | UROLOGICAL MEDICAL GROUP OF NORTH ORANGE COUNTY | FULLERTON | CA | UROLOGY | 3 | 183 | $83,858 | $458 | premium | 1.4% | (714) 870-5970 |
| 41 | FLORIDA CLINICAL PRACTICE ASSOCIATION INC | GAINESVILLE | FL | NURSE PRACTITIONER | 1912 | 183 | $39,651 | $217 | premium | 5.0% | (352) 265-8990 |
| 42 | MAIMONIDES FACULTY PRACTICE PLAN | BROOKLYN | NY | PHYSICIAN ASSISTANT | 243 | 182 | $63,700 | $350 | premium | 1.3% | (718) 283-6000 |
| 43 | RADIOLOGY ASSOCIATES OF RIDGEWOOD P A | WALDWICK | NJ | DIAGNOSTIC RADIOLOGY | 20 | 181 | $61,230 | $338 | premium | 4.1% | (201) 445-8822 |
| 44 | PEACE HEALTH PARTNERS, PC | TEANECK | NJ | DIAGNOSTIC RADIOLOGY | 30 | 180 | $22,500 | $125 | premium | 4.1% | (201) 833-3280 |
| 45 | ADULT MEDICINE SPECIALISTS OF EASLEY PA | EASLEY | SC | PHYSICIAN ASSISTANT | 5 | 179 | $53,700 | $300 | premium | 6.9% | (864) 855-5525 |
| 46 | LAKE MEDICAL IMAGING AND BREAST CENTER AT THE VILLAGES LLC | LEESBURG | FL | DIAGNOSTIC RADIOLOGY | 22 | 177 | $81,090 | $458 | premium | 4.9% | (352) 787-5858 |
| 47 | NORTHEAST OKLAHOMA RADIOLOGY PHYSICIANS LLC | BARTLESVILLE | OK | DIAGNOSTIC RADIOLOGY | 3 | 165 | $34,650 | $210 | premium | 24.1% | (918) 333-7200 |
| 48 | ATLANTIC GASTROENTEROLOGY PC | BROOKLYN | FL | GASTROENTEROLOGY | 7 | 165 | $28,294 | $171 | premium | 4.5% | (718) 615-4001 |
| 49 | RIVERSIDE RADIOLOGY AND INTERVENTIONAL ASSOCIATES INC | COLUMBUS | OH | DIAGNOSTIC RADIOLOGY | 243 | 163 | $37,164 | $228 | premium | 12.7% | (614) 566-5600 |
| 50 | MITTAL KIDNEY AND DIALYSIS, PC | SOUTHAVEN | TN | NEPHROLOGY | 6 | 160 | $26,908 | $168 | premium | 6.4% | (901) 767-0101 |
| 51 | IMAGE GUIDED THERAPEUTICS INC | SAN FRANCISCO | CA | DIAGNOSTIC RADIOLOGY | 16 | 160 | $32,960 | $206 | premium | 1.2% | (415) 353-6000 |
| 52 | SAINT AGNES MEDICAL FOUNDATION | FRESNO | CA | INTERNAL MEDICINE | 155 | 159 | $19,557 | $123 | premium | 1.2% | (559) 450-5777 |
| 53 | TEXAS RADIOLOGY ASSOCIATES LLP | PLANO | TX | DIAGNOSTIC RADIOLOGY | 153 | 158 | $128,296 | $812 | premium | 3.6% | (469) 814-2000 |
| 54 | WINCHESTER RADIOLOGISTS PC | WINCHESTER | VA | DIAGNOSTIC RADIOLOGY | 79 | 156 | $44,772 | $287 | premium | 4.1% | (540) 686-1600 |
| 55 | KIDNEY CARE CONSULTANTS, P.C. | BARTLETT | TN | INTERNAL MEDICINE | 8 | 156 | $25,116 | $161 | premium | 6.3% | (901) 382-5256 |
| 56 | UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL | CHAPEL HILL | NC | NURSE PRACTITIONER | 2120 | 156 | $22,041 | $141 | premium | 14.8% | (984) 215-5556 |
| 57 | KENNEWICK RADIOLOGY GROUP PC | KENNEWICK | KY | DIAGNOSTIC RADIOLOGY | 35 | 152 | $29,944 | $197 | premium | 18.6% | (509) 585-5532 |
| 58 | HOUSTON RADIOLOGY ASSOCIATED | HOUSTON | TX | DIAGNOSTIC RADIOLOGY | 103 | 149 | $56,918 | $382 | premium | 3.4% | (281) 206-9020 |
| 59 | MASSACHUSETTS GENERAL PHYSICIANS ORGANIZATION INC | BOSTON | MA | DIAGNOSTIC RADIOLOGY | 3532 | 148 | $67,175 | $454 | premium | 15.6% | (617) 724-0287 |
| 60 | CALIFORNIA MANAGED IMAGING MEDICAL GROUP INC | SANTA BARBARA | CA | DIAGNOSTIC RADIOLOGY | 64 | 145 | $53,114 | $366 | premium | 1.1% | (800) 841-4236 |
| 61 | RADIOLOGY ASSOCIATES OF ALBUQUERQUE PA | ALBUQUERQUE | NM | DIAGNOSTIC RADIOLOGY | 101 | 145 | $26,053 | $180 | premium | 21.7% | (505) 332-5827 |
| 62 | UROLOGY CENTER OF COLUMBUS, LLC | COLUMBUS | GA | NURSE PRACTITIONER | 2 | 143 | $78,650 | $550 | premium | 5.7% | (706) 324-7700 |
| 63 | PEACE HEALTH PARTNERS, PC | TEANECK | NY | DIAGNOSTIC RADIOLOGY | 30 | 142 | $17,750 | $125 | premium | 1.0% | (201) 833-3280 |
| 64 | ROPER SAINT FRANCIS PHYSICIANS NETWORK | CHARLESTON | SC | PHYSICIAN ASSISTANT | 539 | 141 | $68,640 | $487 | premium | 5.4% | (843) 720-8448 |
| 65 | SMB RADIOLOGY P A | GULFPORT | MS | DIAGNOSTIC RADIOLOGY | 23 | 140 | $30,100 | $215 | premium | 18.2% | (228) 314-7226 |
| 66 | COMMUNITY MEDICAL ASSOCIATES INC | LOUISVILLE | KY | NURSE PRACTITIONER | 1377 | 137 | $27,263 | $199 | premium | 16.8% | (502) 937-2209 |
| 67 | RADIOLOGY PHYSICIANS INC | DAYTON | OH | DIAGNOSTIC RADIOLOGY | 61 | 136 | $30,192 | $222 | premium | 10.6% | (937) 208-8000 |
| 68 | DAKOTA VASCULAR PROF LLC | SIOUX FALLS | SD | VASCULAR SURGERY | 6 | 135 | $62,611 | $464 | premium | 35.3% | (605) 306-6100 |
| 69 | YEVGENY LITVAK MEDICAL PLLC | BROOKLYN | NY | GASTROENTEROLOGY | 2 | 134 | $43,889 | $328 | premium | 1.0% | (718) 234-2233 |
| 70 | ALTRU HEALTH SYSTEM | GRAND FORKS | ND | NURSE PRACTITIONER | 653 | 133 | $53,067 | $399 | premium | 43.6% | (701) 780-5000 |
| 71 | EVANSVILLE RADIOLOGY PC | EVANSVILLE | IN | DIAGNOSTIC RADIOLOGY | 29 | 131 | $34,584 | $264 | premium | 13.5% | (812) 422-3254 |
| 72 | MONTEFIORE MEDICAL CENTER | BRONX | NY | PHYSICAL THERAPIST IN PRIVATE PRACTICE | 2796 | 131 | $72,195 | $551 | premium | 0.9% | (866) 633-8255 |
| 73 | UNIVERSITY OF PITTSBURGH PHYSICIANS | PITTSBURGH | PA | DIAGNOSTIC RADIOLOGY | 4291 | 128 | $31,094 | $243 | premium | 6.2% | — |
| 74 | WESTCHESTER MEDICAL CENTER ADVANCED PHYSICIAN SERVICES PC | VALHALLA | NY | DIAGNOSTIC RADIOLOGY | 875 | 128 | $19,456 | $152 | premium | 0.9% | — |
| 75 | KANSAS CITY VASCULAR AND GENERAL SURGERY GROUP LLC | OVERLAND PARK | KS | NURSE PRACTITIONER | 22 | 127 | $78,564 | $619 | premium | 19.6% | (913) 754-2800 |
| 76 | NEW YORK UNIVERSITY | NEW YORK | NY | DIAGNOSTIC RADIOLOGY | 5704 | 127 | $122,890 | $968 | premium | 0.9% | (212) 263-9700 |
| 77 | CENTRAL ILLINOIS RADIOLOGICAL ASSOCIATES LTD | PEORIA | IL | DIAGNOSTIC RADIOLOGY | 196 | 125 | $34,141 | $273 | premium | 3.4% | (309) 655-2000 |
| 78 | UNIVERSITY OF TEXAS SOUTHWESTERN MEDICAL CENTER AT DALLAS | DALLAS | TX | PHYSICIAN ASSISTANT | 3200 | 125 | $50,328 | $403 | premium | 2.8% | (214) 633-5555 |
| 79 | BELLEZZA SENSA LLC | PRESCOTT | AZ | NURSE PRACTITIONER | 2 | 123 | $46,248 | $376 | premium | 5.7% | (928) 237-4422 |
| 80 | OCHSNER CLINIC LLC | NEW ORLEANS | LA | NURSE PRACTITIONER | 2839 | 122 | $15,860 | $130 | premium | 12.6% | (504) 842-3000 |
| 81 | BRYAN RADIOLOGY ASSOCIATES | BRYAN | TX | DIAGNOSTIC RADIOLOGY | 11 | 119 | $26,775 | $225 | premium | 2.7% | (979) 776-5931 |
| 82 | QUEENS MEDICAL CARE SERVICE PC | REGO PARK | NY | DIAGNOSTIC RADIOLOGY | 4 | 117 | $52,650 | $450 | premium | 0.8% | (718) 730-4606 |
| 83 | STATE OF MISSISSIPPI - UNIVERSITY OF MISSISSIPPI MEDICAL CENTER | JACKSON | MS | NURSE PRACTITIONER | 951 | 111 | $17,760 | $160 | premium | 14.4% | (601) 815-4775 |
| 84 | ENLOE MEDICAL CENTER | CHICO | CA | DIAGNOSTIC RADIOLOGY | 362 | 110 | $9,240 | $84 | premium | 0.8% | (530) 332-4470 |
| 85 | MERCY CLINIC SPRINGFIELD COMMUNITIES | SPRINGFIELD | MO | PHYSICIAN ASSISTANT | 1128 | 110 | $17,270 | $157 | premium | 13.4% | — |
| 86 | ST. JOSEPH'S/CANDLER OB/GYN PRACTICE, LLC | SAVANNAH | GA | OBSTETRICS/GYNECOLOGY | 21 | 110 | $51,370 | $467 | premium | 4.4% | (912) 355-5755 |
| 87 | IMPRESSION IMAGING LLC | TAMARAC | FL | DIAGNOSTIC RADIOLOGY | 20 | 110 | $8,800 | $80 | premium | 3.0% | (954) 580-2780 |
| 88 | BATON ROUGE CLINIC, A MEDICAL CORPORATION | BATON ROUGE | LA | INTERNAL MEDICINE | 289 | 109 | $29,975 | $275 | premium | 11.3% | (225) 246-9790 |
| 89 | PRISMA HEALTH UNIVERSITY MEDICAL GROUP | GREENVILLE | SC | NURSE PRACTITIONER | 2447 | 105 | $13,440 | $128 | premium | 4.0% | — |
| 90 | MILLENNIUM PHYSICIAN GROUP LLC | PORT CHARLOTTE | FL | PHYSICIAN ASSISTANT | 953 | 102 | $29,508 | $289 | premium | 2.8% | (941) 255-3535 |
| 91 | RENAISSANCE GENERAL MEDICINE PC | CLIFFSIDE PARK | NJ | INTERNAL MEDICINE | 2 | 102 | $40,350 | $396 | premium | 2.3% | (201) 943-2700 |
| 92 | COTTON-O'NEIL CLINIC REVOCABLE TRUST | TOPEKA | KS | NURSE PRACTITIONER | 649 | 100 | $38,546 | $385 | premium | 15.4% | (785) 354-9591 |
| 93 | POLYXENE GAZETAS KOKINOS MD PC | CAMPBELL | CA | VASCULAR SURGERY | 5 | 100 | $11,200 | $112 | premium | 0.7% | (408) 376-3626 |
| 94 | KETTERING NETWORK RADIOLOGISTS INC | DAYTON | OH | DIAGNOSTIC RADIOLOGY | 74 | 98 | $22,638 | $231 | premium | 7.6% | (937) 558-3800 |
| 95 | STONY BROOK SURGICAL ASSOCIATES UNIVERSITY FACULTY PRACTICE CORPORATI | HAMPTON BAYS | NY | GENERAL SURGERY | 102 | 96 | $50,587 | $527 | premium | 0.7% | (631) 723-5000 |
| 96 | BEAUMONT INTERNAL MEDICINE AND GERIATRIC ASSOC. | BEAUMONT | TX | NURSE PRACTITIONER | 17 | 94 | $12,690 | $135 | premium | 2.1% | (409) 898-2994 |
| 97 | DIAGNOSTIC RADIOLOGISTS PC | PORTLAND | OR | DIAGNOSTIC RADIOLOGY | 11 | 94 | $19,740 | $210 | premium | 15.4% | (503) 251-6132 |
| 98 | ARROWHEAD RADIOLOGY MEDICAL GROUP INC | COLTON | CA | DIAGNOSTIC RADIOLOGY | 10 | 93 | $16,368 | $176 | premium | 0.7% | (909) 580-1520 |
| 99 | PALM DESERT RADIOLOGY MEDICAL GROUP INC | RANCHO MIRAGE | CA | DIAGNOSTIC RADIOLOGY | 125 | 91 | $22,555 | $248 | premium | 0.7% | (760) 773-1251 |
| 100 | IMAGING ASSOCIATES OF INDIANA, PC | CROWN POINT | IL | DIAGNOSTIC RADIOLOGY | 263 | 90 | $25,524 | $284 | premium | 2.4% | (219) 757-6320 |
Showing the top 100 of 467 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 →