72131 — Ct scan of lower spine without contrast
174,507 observed fee-for-service (49%) · ~183,848 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; 3 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 | 72131 svcs | Submitted charges | Avg charge | Medicare $ locked column | Share* | Phone |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | RADIOLOGY ASSOCIATES OF NORTH TEXAS PA | FORT WORTH | TX | DIAGNOSTIC RADIOLOGY | 340 | 4,064 | $891,411 | $219 | premium | 8.6% | (817) 321-0470 |
| 2 | STONY BROOK RADIOLOGY, UNIVERSITY FACULTY PRACTICE CORPORATION | STONY BROOK | NY | DIAGNOSTIC RADIOLOGY | 59 | 3,387 | $1,119,220 | $330 | premium | 12.0% | (631) 638-2121 |
| 3 | HOUSTON RADIOLOGY ASSOCIATED | HOUSTON | TX | DIAGNOSTIC RADIOLOGY | 103 | 2,843 | $1,178,435 | $415 | premium | 6.0% | (281) 206-9020 |
| 4 | MORI BEAN AND BROOKS INC | ORANGE PARK | FL | DIAGNOSTIC RADIOLOGY | 947 | 2,727 | $1,348,788 | $495 | premium | 6.1% | (904) 399-5550 |
| 5 | CHARLOTTE RADIOLOGY PA | CHARLOTTE | NC | DIAGNOSTIC RADIOLOGY | 218 | 2,115 | $774,190 | $366 | premium | 14.3% | (704) 362-1945 |
| 6 | MAYO CLINIC | ROCHESTER | MN | NURSE PRACTITIONER | 4896 | 1,921 | $1,976,971 | $1,029 | premium | 9.5% | (507) 284-2511 |
| 7 | SCOTT AND WHITE CLINIC | TEMPLE | TX | PHYSICIAN ASSISTANT | 2435 | 1,810 | $398,998 | $220 | premium | 3.8% | (254) 724-2663 |
| 8 | SUTTER VALLEY MEDICAL FOUNDATION | SACRAMENTO | CA | DIAGNOSTIC RADIOLOGY | 2420 | 1,803 | $975,959 | $541 | premium | 3.8% | (916) 681-8852 |
| 9 | ADVANCED RADIOLOGY SERVICES PC | GRAND RAPIDS | MI | DIAGNOSTIC RADIOLOGY | 249 | 1,763 | $409,236 | $232 | premium | 12.1% | (616) 363-7272 |
| 10 | RHODE ISLAND MEDICAL IMAGING INC | EAST PROVIDENCE | RI | DIAGNOSTIC RADIOLOGY | 109 | 1,747 | $442,731 | $253 | premium | 68.9% | (401) 626-3900 |
| 11 | ADVANCED RADIOLOGY P A | BALTIMORE | MD | DIAGNOSTIC RADIOLOGY | 161 | 1,549 | $749,604 | $484 | premium | 14.6% | (888) 972-9700 |
| 12 | DIGNITY HEALTH MEDICAL FOUNDATION | FOLSOM | CA | DIAGNOSTIC RADIOLOGY | 1197 | 1,480 | $527,411 | $356 | premium | 3.2% | (916) 983-7476 |
| 13 | EVANSVILLE RADIOLOGY PC | EVANSVILLE | IN | DIAGNOSTIC RADIOLOGY | 29 | 1,382 | $349,646 | $253 | premium | 17.4% | (812) 422-3254 |
| 14 | COLUMBUS RADIOLOGY CORP | COLUMBUS | OH | DIAGNOSTIC RADIOLOGY | 288 | 1,367 | $887,277 | $649 | premium | 6.7% | (614) 228-7231 |
| 15 | THE ASSOCIATION OF UNIVERSITY PHYSICIANS | SEATTLE | WA | PHYSICIAN ASSISTANT | 3612 | 1,365 | $199,105 | $146 | premium | 15.7% | (206) 364-0500 |
| 16 | NEW YORK UNIVERSITY | NEW YORK | NY | DIAGNOSTIC RADIOLOGY | 5704 | 1,318 | $964,995 | $732 | premium | 4.7% | (212) 263-9700 |
| 17 | IHC HEALTH SERVICES INC | MURRAY | UT | PHYSICIAN ASSISTANT | 3944 | 1,296 | $208,825 | $161 | premium | 33.3% | (801) 261-8346 |
| 18 | ZWANGER AND PESIRI RADIOLOGY GROUP LLP | LINDENHURST | NY | DIAGNOSTIC RADIOLOGY | 91 | 1,262 | $696,303 | $552 | premium | 4.5% | (631) 225-7200 |
| 19 | RADIOLOGY PHYSICIANS INC | DAYTON | OH | DIAGNOSTIC RADIOLOGY | 61 | 1,233 | $253,998 | $206 | premium | 6.0% | (937) 208-8000 |
| 20 | WEST COUNTY RADIOLOGICAL GROUP INC | SAINT LOUIS | MO | DIAGNOSTIC RADIOLOGY | 104 | 1,143 | $304,239 | $266 | premium | 7.5% | (314) 941-5600 |
| 21 | SINGLETON ASSOCIATES PA | HOUSTON | TX | DIAGNOSTIC RADIOLOGY | 769 | 1,138 | $738,562 | $649 | premium | 2.4% | (855) 504-4544 |
| 22 | RADIOLOGY ASSOCIATES OF RICHMOND INC | RICHMOND | VA | DIAGNOSTIC RADIOLOGY | 70 | 1,132 | $181,460 | $160 | premium | 8.3% | (804) 272-8806 |
| 23 | SCRIPPS HEALTH | LA JOLLA | CA | PHYSICIAN ASSISTANT | 1431 | 1,118 | $436,895 | $391 | premium | 2.4% | (858) 455-9100 |
| 24 | ENDEAVOR HEALTH MEDICAL GROUP | EVANSTON | IL | NURSE PRACTITIONER | 3380 | 1,115 | $212,785 | $191 | premium | 5.4% | — |
| 25 | TEXAS RADIOLOGY ASSOCIATES LLP | PLANO | TX | DIAGNOSTIC RADIOLOGY | 153 | 1,002 | $452,800 | $452 | premium | 2.1% | (469) 814-2000 |
| 26 | NORTH BROWARD RADIOLOGISTS, P.A. | FORT LAUDERDALE | FL | DIAGNOSTIC RADIOLOGY | 23 | 1,001 | $192,886 | $193 | premium | 2.2% | (954) 262-1140 |
| 27 | COMMONWEALTH RADIOLOGY PC | RICHMOND | VA | DIAGNOSTIC RADIOLOGY | 49 | 994 | $154,070 | $155 | premium | 7.3% | (804) 288-8327 |
| 28 | ANCILLARY SERVICES OF PRACTICE ASSOCIATES PA | MORRISTOWN | NJ | DIAGNOSTIC RADIOLOGY | 97 | 964 | $178,441 | $185 | premium | 8.6% | (973) 971-6866 |
| 29 | OSU RADIOLOGY LLC | COLUMBUS | OH | DIAGNOSTIC RADIOLOGY | 174 | 940 | $179,315 | $191 | premium | 4.6% | (614) 293-8315 |
| 30 | UNIVERSITY HOSPITALS MEDICAL GROUP INC | CLEVELAND | OH | NURSE PRACTITIONER | 2232 | 926 | $143,641 | $155 | premium | 4.5% | — |
| 31 | NORTHWESTERN MEDICAL FACULTY FOUNDATION | CHICAGO | IL | NURSE PRACTITIONER | 4339 | 917 | $328,065 | $358 | premium | 4.4% | — |
| 32 | MAYO CLINIC ARIZONA | PHOENIX | AZ | PHYSICIAN ASSISTANT | 1635 | 912 | $487,380 | $534 | premium | 7.8% | (800) 603-0558 |
| 33 | KETTERING NETWORK RADIOLOGISTS INC | DAYTON | OH | DIAGNOSTIC RADIOLOGY | 74 | 898 | $206,540 | $230 | premium | 4.4% | (937) 558-3800 |
| 34 | CENTRAL ILLINOIS RADIOLOGICAL ASSOCIATES LTD | PEORIA | IL | DIAGNOSTIC RADIOLOGY | 196 | 877 | $314,257 | $358 | premium | 4.2% | (309) 655-2000 |
| 35 | BEAUMONT MEDICAL GROUP HOSPITAL BASED SERVICES | TROY | MI | DIAGNOSTIC RADIOLOGY | 583 | 779 | $222,251 | $285 | premium | 5.4% | (248) 964-1187 |
| 36 | RIVERSIDE RADIOLOGY AND INTERVENTIONAL ASSOCIATES INC | COLUMBUS | OH | DIAGNOSTIC RADIOLOGY | 243 | 767 | $197,119 | $257 | premium | 3.7% | (614) 566-5600 |
| 37 | KENTUCKY MEDICAL SERVICES FOUNDATION, INC | LEXINGTON | KY | DIAGNOSTIC RADIOLOGY | 989 | 761 | $134,570 | $177 | premium | 11.5% | (859) 257-1412 |
| 38 | REGENTS OF THE UNIVERSITY OF CALIFORNIA | SAN DIEGO | CA | DIAGNOSTIC RADIOLOGY | 2057 | 727 | $247,649 | $341 | premium | 1.5% | (800) 926-8273 |
| 39 | UNIVERSITY OF CINCINNATI PHYSICIANS COMPANY LLC | CINCINNATI | OH | NURSE PRACTITIONER | 1504 | 715 | $99,385 | $139 | premium | 3.5% | (513) 584-1000 |
| 40 | TOLEDO RADIOLOGICAL ASSOCIATES INC | COLDWATER | OH | DIAGNOSTIC RADIOLOGY | 51 | 713 | $104,421 | $146 | premium | 3.5% | (517) 279-5400 |
| 41 | RADIOLOGY ASSOCIATES OF ABILENE PA | ABILENE | TX | DIAGNOSTIC RADIOLOGY | 25 | 707 | $210,842 | $298 | premium | 1.5% | (325) 670-2000 |
| 42 | MECKLENBURG RADIOLOGY ASSOCIATES PA | CHARLOTTE | NC | DIAGNOSTIC RADIOLOGY | 94 | 699 | $160,018 | $229 | premium | 4.7% | (704) 332-1291 |
| 43 | MAYO CLINIC JACKSONVILLE | JACKSONVILLE | FL | NURSE PRACTITIONER | 1587 | 699 | $945,830 | $1,353 | premium | 1.6% | (904) 953-2000 |
| 44 | NEURO INTERVENTIONAL AND DIAGNOSTIC ASSOCIATES, PC | LEES SUMMIT | MO | DIAGNOSTIC RADIOLOGY | 5 | 685 | $137,685 | $201 | premium | 4.5% | (816) 347-5000 |
| 45 | UMASS MEMORIAL MEDICAL GROUP INC | WORCESTER | MA | PHYSICIAN ASSISTANT | 2483 | 666 | $179,360 | $269 | premium | 6.1% | (508) 334-1000 |
| 46 | LAKELAND RADIOLOGISTS P A | FLOWOOD | MS | DIAGNOSTIC RADIOLOGY | 29 | 664 | $185,840 | $280 | premium | 13.8% | (601) 936-2390 |
| 47 | LAHEY CLINIC INC | BURLINGTON | MA | NURSE PRACTITIONER | 1400 | 658 | $142,899 | $217 | premium | 6.0% | — |
| 48 | MASSACHUSETTS GENERAL PHYSICIANS ORGANIZATION INC | BOSTON | MA | DIAGNOSTIC RADIOLOGY | 3532 | 651 | $295,949 | $455 | premium | 5.9% | (617) 724-0287 |
| 49 | DRS HARRIS BIRKHILL WANG SONGE AND ASSOC PC | DEARBORN | MI | DIAGNOSTIC RADIOLOGY | 62 | 629 | $110,275 | $175 | premium | 4.3% | (313) 593-7301 |
| 50 | DRS. MCCLOW, CLARK AND BERK PA | JACKSONVILLE | FL | DIAGNOSTIC RADIOLOGY | 22 | 624 | $209,664 | $336 | premium | 1.4% | (904) 381-9994 |
| 51 | PRISMA HEALTH UNIVERSITY MEDICAL GROUP | GREENVILLE | SC | NURSE PRACTITIONER | 2447 | 623 | $105,158 | $169 | premium | 11.0% | — |
| 52 | SMI IMAGING LLC | PHOENIX | AZ | DIAGNOSTIC RADIOLOGY | 364 | 623 | $432,948 | $695 | premium | 5.4% | (480) 753-6161 |
| 53 | CLEVELAND CLINIC FLORIDA | WESTON | FL | NURSE PRACTITIONER | 720 | 614 | $325,687 | $530 | premium | 1.4% | (954) 659-5000 |
| 54 | STATE UNIVERSITY OF IOWA | IOWA CITY | IA | PHYSICIAN ASSISTANT | 1902 | 612 | $211,638 | $346 | premium | 19.7% | (319) 678-8201 |
| 55 | BANNER-UNIVERSITY MEDICAL GROUP | TUCSON | AZ | INTERNAL MEDICINE | 1068 | 610 | $78,800 | $129 | premium | 5.2% | (520) 694-0111 |
| 56 | INTELLIRAD IMAGING LLC | MIAMI | FL | DIAGNOSTIC RADIOLOGY | 61 | 607 | $111,903 | $184 | premium | 1.4% | (305) 854-4400 |
| 57 | RADIOLOGY LTD LLC | TUCSON | AZ | DIAGNOSTIC RADIOLOGY | 102 | 607 | $386,979 | $638 | premium | 5.2% | (520) 290-4842 |
| 58 | RADIOLOGY CONSULTANTS OF TULSA, INC. | TULSA | OK | DIAGNOSTIC RADIOLOGY | 34 | 606 | $87,416 | $144 | premium | 8.7% | (918) 743-8838 |
| 59 | RADIOLOGY ASSOCIATES LLC | BATON ROUGE | LA | DIAGNOSTIC RADIOLOGY | 79 | 603 | $133,542 | $221 | premium | 9.2% | (225) 757-0552 |
| 60 | SPRINGFIELD CLINIC, LLP | SPRINGFIELD | IL | NURSE PRACTITIONER | 686 | 597 | $259,233 | $434 | premium | 2.9% | (217) 544-6464 |
| 61 | MEDICAL SCANNING CONSULTANTS PA | ST LOUIS PARK | MN | DIAGNOSTIC RADIOLOGY | 81 | 596 | $660,528 | $1,108 | premium | 2.9% | (952) 541-1840 |
| 62 | MORAN ROWEN AND DORSEY INC | ORANGE | CA | DIAGNOSTIC RADIOLOGY | 35 | 558 | $126,406 | $227 | premium | 1.2% | (714) 628-3305 |
| 63 | REGENTS OF THE UNIV OF CA | SACRAMENTO | CA | DIAGNOSTIC RADIOLOGY | 1608 | 557 | $157,074 | $282 | premium | 1.2% | (877) 827-7463 |
| 64 | RADIOLOGY INC | HUNTINGTON | WV | DIAGNOSTIC RADIOLOGY | 28 | 556 | $117,288 | $211 | premium | 18.9% | (304) 526-1140 |
| 65 | ROPER RADIOLOGISTS PA | CHARLESTON | SC | DIAGNOSTIC RADIOLOGY | 40 | 552 | $251,764 | $456 | premium | 9.7% | (843) 724-2161 |
| 66 | UNIVERSITY OF ALABAMA HEALTH SERVICES FOUNDATION, PC | BIRMINGHAM | AL | NURSE PRACTITIONER | 2788 | 549 | $142,020 | $259 | premium | 6.2% | (205) 934-3460 |
| 67 | VISTA RADIOLOGY, PC | KNOXVILLE | TN | DIAGNOSTIC RADIOLOGY | 68 | 536 | $139,585 | $260 | premium | 5.1% | (865) 546-9484 |
| 68 | RADIOLOGY CONSULTANTS PC | OMAHA | NE | DIAGNOSTIC RADIOLOGY | 46 | 534 | $90,780 | $170 | premium | 12.3% | (402) 717-4760 |
| 69 | WINCHESTER RADIOLOGISTS PC | WINCHESTER | VA | DIAGNOSTIC RADIOLOGY | 79 | 531 | $127,440 | $240 | premium | 3.9% | (540) 686-1600 |
| 70 | TRISTATE IMG (IMAGING MEDICAL GROUP) INC | CINCINNATI | OH | DIAGNOSTIC RADIOLOGY | 44 | 528 | $98,252 | $186 | premium | 2.6% | (513) 865-1331 |
| 71 | STANFORD HEALTH CARE | STANFORD | CA | DIAGNOSTIC RADIOLOGY | 3039 | 526 | $349,075 | $664 | premium | 1.1% | (650) 723-4000 |
| 72 | DARTMOUTH-HITCHCOCK CLINIC | LEBANON | NH | PHYSICIAN ASSISTANT | 1441 | 524 | $451,170 | $861 | premium | 24.0% | (603) 650-5000 |
| 73 | LAKE MEDICAL IMAGING AND BREAST CENTER AT THE VILLAGES LLC | LEESBURG | FL | DIAGNOSTIC RADIOLOGY | 22 | 522 | $172,479 | $330 | premium | 1.2% | (352) 787-5858 |
| 74 | BLUE RIDGE RADIOLOGY PC | LYNCHBURG | TN | DIAGNOSTIC RADIOLOGY | 76 | 514 | $93,106 | $181 | premium | 4.9% | (423) 968-1144 |
| 75 | FPA HOSPITAL BASED | NEW YORK | NY | DIAGNOSTIC RADIOLOGY | 427 | 506 | $153,748 | $304 | premium | 1.8% | (212) 252-6004 |
| 76 | RADIOLOGY ASSOCIATES OF RIDGEWOOD P A | WALDWICK | NJ | DIAGNOSTIC RADIOLOGY | 20 | 486 | $144,494 | $297 | premium | 4.3% | (201) 445-8822 |
| 77 | UNIVERSITY OF MIAMI | MIAMI | FL | NURSE PRACTITIONER | 2331 | 484 | $90,269 | $187 | premium | 1.1% | (305) 689-5437 |
| 78 | AMERICAN RADIOLOGY CONSULTANTS PLLC | DALLAS | TX | DIAGNOSTIC RADIOLOGY | 121 | 476 | $99,008 | $208 | premium | 1.0% | (214) 820-3216 |
| 79 | EASTERN RADIOLOGISTS INC | GREENVILLE | NC | DIAGNOSTIC RADIOLOGY | 93 | 476 | $83,776 | $176 | premium | 3.2% | (252) 752-5000 |
| 80 | PROGRESSIVE PHYSICIAN ASSOC INC | PHILLIPSBURG | PA | DIAGNOSTIC RADIOLOGY | 160 | 476 | $89,488 | $188 | premium | 2.8% | (908) 859-6700 |
| 81 | NORTHSIDE RADIOLOGY ASSOCIATES LLC | ATLANTA | GA | DIAGNOSTIC RADIOLOGY | 370 | 472 | $306,328 | $649 | premium | 3.7% | (404) 851-6577 |
| 82 | SANFORD MEDICAL CENTER FARGO | FARGO | ND | NURSE PRACTITIONER | 1198 | 471 | $88,130 | $187 | premium | 39.9% | (701) 234-2000 |
| 83 | UNIVERSITY OF TEXAS SOUTHWESTERN MEDICAL CENTER AT DALLAS | DALLAS | TX | PHYSICIAN ASSISTANT | 3200 | 471 | $90,388 | $192 | premium | 1.0% | (214) 633-5555 |
| 84 | STEPHEN W BROWN AND RADIOLOGY ASSOCIATES OF AUGUSTA LLP | AUGUSTA | GA | DIAGNOSTIC RADIOLOGY | 19 | 458 | $116,180 | $254 | premium | 3.6% | (706) 774-5035 |
| 85 | WELLSPAN MEDICAL GROUP | YORK | PA | PHYSICIAN ASSISTANT | 2312 | 456 | $61,013 | $134 | premium | 2.6% | — |
| 86 | DUKE HEALTH INTEGRATED PRACTICE INC | DURHAM | NC | PHYSICIAN ASSISTANT | 3051 | 455 | $150,195 | $330 | premium | 3.1% | (919) 684-8111 |
| 87 | SOUTH GEORGIA RADIOLOGY ASSOCIATES LLC | BAXLEY | GA | DIAGNOSTIC RADIOLOGY | 35 | 450 | $105,218 | $234 | premium | 3.6% | (912) 367-9841 |
| 88 | PENINSULA RADIOLOGICAL ASSOCIATES LIMITED | NEWPORT NEWS | VA | DIAGNOSTIC RADIOLOGY | 65 | 435 | $103,530 | $238 | premium | 3.2% | (757) 594-3900 |
| 89 | RADIOLOGY OF HUNSTVILLE PC | HUNTSVILLE | AL | DIAGNOSTIC RADIOLOGY | 63 | 435 | $70,155 | $161 | premium | 4.9% | 2565390457145 |
| 90 | QUANTUM RADIOLOGY PC | MARIETTA | GA | DIAGNOSTIC RADIOLOGY | 104 | 434 | $121,086 | $279 | premium | 3.4% | (770) 732-4000 |
| 91 | SOUTHWEST NEURO-IMAGING LTD | PHOENIX | AZ | DIAGNOSTIC RADIOLOGY | 8 | 429 | $94,132 | $219 | premium | 3.7% | (602) 954-6228 |
| 92 | ENGLEWOOD RADIOLOGIC GROUP P A | ENGLEWOOD | NJ | DIAGNOSTIC RADIOLOGY | 125 | 428 | $90,308 | $211 | premium | 3.8% | (201) 894-3480 |
| 93 | ARKANSAS HEALTH GROUP | LITTLE ROCK | AR | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 666 | 423 | $73,983 | $175 | premium | 8.5% | (501) 202-2093 |
| 94 | PALM DESERT RADIOLOGY MEDICAL GROUP INC | RANCHO MIRAGE | CA | DIAGNOSTIC RADIOLOGY | 125 | 422 | $63,251 | $150 | premium | 0.9% | (760) 773-1251 |
| 95 | RADIOLOGY OF MSMC, LLC | MIAMI | FL | DIAGNOSTIC RADIOLOGY | 23 | 405 | $108,894 | $269 | premium | 0.9% | (305) 674-3905 |
| 96 | UC REGENTS | ORANGE | CA | DIAGNOSTIC RADIOLOGY | 99 | 403 | $93,905 | $233 | premium | 0.9% | (714) 456-7004 |
| 97 | SDMI, LLC | LAS VEGAS | NV | DIAGNOSTIC RADIOLOGY | 36 | 397 | $256,534 | $646 | premium | 9.3% | (702) 732-6000 |
| 98 | UTMB FACULTY GROUP PRACTICE | GALVESTON | TX | NURSE PRACTITIONER | 1068 | 394 | $48,462 | $123 | premium | 0.8% | (409) 772-2222 |
| 99 | SUBURBAN RADIOLOGISTS, S.C. | HINSDALE | IL | DIAGNOSTIC RADIOLOGY | 22 | 394 | $103,090 | $262 | premium | 1.9% | (630) 856-9000 |
| 100 | OKLAHOMA RADIOLOGY GROUP P C | OKLAHOMA CITY | OK | DIAGNOSTIC RADIOLOGY | 61 | 386 | $82,833 | $215 | premium | 5.5% | (405) 272-7000 |
Showing the top 100 of 847 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 →