73720 — Mri scan of leg before and after contrast
13,196 observed fee-for-service (49%) · ~13,863 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 | 73720 svcs | Submitted charges | Avg charge | Medicare $ locked column | Share* | Phone |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | PHYSICIANS REFERRAL SERVICE | HOUSTON | TX | NURSE PRACTITIONER | 2696 | 364 | $393,807 | $1,082 | premium | 18.7% | (713) 592-5433 |
| 2 | MAYO CLINIC | ROCHESTER | MN | NURSE PRACTITIONER | 4896 | 323 | $1,116,757 | $3,457 | premium | 23.5% | (507) 284-2511 |
| 3 | ADVANCED RADIOLOGY SERVICES PC | GRAND RAPIDS | MI | DIAGNOSTIC RADIOLOGY | 249 | 316 | $81,796 | $259 | premium | 26.5% | (616) 363-7272 |
| 4 | ZWANGER AND PESIRI RADIOLOGY GROUP LLP | LINDENHURST | NY | DIAGNOSTIC RADIOLOGY | 91 | 305 | $546,893 | $1,793 | premium | 14.2% | (631) 225-7200 |
| 5 | PRISMA HEALTH UNIVERSITY MEDICAL GROUP | GREENVILLE | SC | NURSE PRACTITIONER | 2447 | 280 | $78,316 | $280 | premium | 40.2% | — |
| 6 | OSU RADIOLOGY LLC | COLUMBUS | OH | DIAGNOSTIC RADIOLOGY | 174 | 223 | $96,750 | $434 | premium | 18.7% | (614) 293-8315 |
| 7 | CHARLOTTE RADIOLOGY PA | CHARLOTTE | NC | DIAGNOSTIC RADIOLOGY | 218 | 220 | $113,372 | $515 | premium | 16.8% | (704) 362-1945 |
| 8 | H LEE MOFFITT CANCER CTR AND RES INST LIFE TIME CANCER SCRN CTR INC | TAMPA | FL | PHYSICIAN ASSISTANT | 1103 | 214 | $80,302 | $375 | premium | 8.9% | (813) 745-4673 |
| 9 | SUTTER VALLEY MEDICAL FOUNDATION | SACRAMENTO | CA | DIAGNOSTIC RADIOLOGY | 2420 | 201 | $341,818 | $1,701 | premium | 7.8% | (916) 681-8852 |
| 10 | BRIGHAM AND WOMENS PHYSICIANS ORGANIZATION INC | BOSTON | MA | PHYSICIAN ASSISTANT | 2942 | 199 | $92,577 | $465 | premium | 12.8% | (617) 732-5500 |
| 11 | MASSACHUSETTS GENERAL PHYSICIANS ORGANIZATION INC | BOSTON | MA | DIAGNOSTIC RADIOLOGY | 3532 | 195 | $435,369 | $2,233 | premium | 12.5% | (617) 724-0287 |
| 12 | SCRIPPS HEALTH | LA JOLLA | CA | PHYSICIAN ASSISTANT | 1431 | 187 | $169,787 | $908 | premium | 7.2% | (858) 455-9100 |
| 13 | NORTHWESTERN MEDICAL FACULTY FOUNDATION | CHICAGO | IL | NURSE PRACTITIONER | 4339 | 185 | $101,206 | $547 | premium | 14.7% | — |
| 14 | REGENTS OF THE UNIVERSITY OF CALIFORNIA | SAN DIEGO | CA | DIAGNOSTIC RADIOLOGY | 2057 | 172 | $167,654 | $975 | premium | 6.7% | (800) 926-8273 |
| 15 | MAYO CLINIC ARIZONA | PHOENIX | AZ | PHYSICIAN ASSISTANT | 1635 | 169 | $142,661 | $844 | premium | 25.8% | (800) 603-0558 |
| 16 | STANFORD HEALTH CARE | STANFORD | CA | DIAGNOSTIC RADIOLOGY | 3039 | 159 | $219,269 | $1,379 | premium | 6.2% | (650) 723-4000 |
| 17 | REGENTS OF THE UNIVERSITY OF MICHIGAN | ANN ARBOR | MI | INTERNAL MEDICINE | 3330 | 148 | $102,696 | $694 | premium | 12.4% | (734) 763-5459 |
| 18 | THE ASSOCIATION OF UNIVERSITY PHYSICIANS | SEATTLE | WA | PHYSICIAN ASSISTANT | 3612 | 148 | $46,687 | $315 | premium | 15.1% | (206) 364-0500 |
| 19 | MAYO CLINIC JACKSONVILLE | JACKSONVILLE | FL | NURSE PRACTITIONER | 1587 | 134 | $614,224 | $4,584 | premium | 5.6% | (904) 953-2000 |
| 20 | UNIVERSITY OF TEXAS SOUTHWESTERN MEDICAL CENTER AT DALLAS | DALLAS | TX | PHYSICIAN ASSISTANT | 3200 | 129 | $50,362 | $390 | premium | 6.6% | (214) 633-5555 |
| 21 | TOLEDO RADIOLOGICAL ASSOCIATES INC | COLDWATER | OH | DIAGNOSTIC RADIOLOGY | 51 | 122 | $38,262 | $314 | premium | 10.2% | (517) 279-5400 |
| 22 | SDMI, LLC | LAS VEGAS | NV | DIAGNOSTIC RADIOLOGY | 36 | 107 | $118,734 | $1,110 | premium | 43.3% | (702) 732-6000 |
| 23 | YALE UNIVERSITY | NEW HAVEN | CT | PHYSICIAN ASSISTANT | 2649 | 105 | $49,875 | $475 | premium | 22.9% | (203) 688-4242 |
| 24 | EVANSVILLE RADIOLOGY PC | EVANSVILLE | IN | DIAGNOSTIC RADIOLOGY | 29 | 100 | $44,800 | $448 | premium | 20.1% | (812) 422-3254 |
| 25 | ENDEAVOR HEALTH MEDICAL GROUP | EVANSTON | IL | NURSE PRACTITIONER | 3380 | 98 | $34,202 | $349 | premium | 7.8% | — |
| 26 | RHODE ISLAND MEDICAL IMAGING INC | EAST PROVIDENCE | RI | DIAGNOSTIC RADIOLOGY | 109 | 96 | $66,420 | $692 | premium | 68.6% | (401) 626-3900 |
| 27 | MASS GENERAL BRIGHAM COMMUNITY PHYSICIANS INC | MEDFORD | MA | DIAGNOSTIC RADIOLOGY | 424 | 96 | $44,028 | $459 | premium | 6.2% | (781) 395-4909 |
| 28 | KANSAS UNIVERSITY PHYSICIANS INC | KANSAS CITY | KS | NURSE PRACTITIONER | 1815 | 94 | $24,030 | $256 | premium | 27.0% | (913) 588-1227 |
| 29 | SPARTANBURG MEDICAL CENTER | SPARTANBURG | SC | NURSE PRACTITIONER | 1070 | 90 | $31,122 | $346 | premium | 12.9% | (864) 587-3000 |
| 30 | HURON VALLEY RADIOLOGY PC | YPSILANTI | MI | DIAGNOSTIC RADIOLOGY | 77 | 88 | $30,840 | $350 | premium | 7.4% | (734) 712-8350 |
| 31 | WEST COUNTY RADIOLOGICAL GROUP INC | SAINT LOUIS | MO | DIAGNOSTIC RADIOLOGY | 104 | 87 | $30,450 | $350 | premium | 7.1% | (314) 941-5600 |
| 32 | UNIVERSITY OF ARKANSAS FOR MEDICAL SCIENCES | LITTLE ROCK | AR | NURSE PRACTITIONER | 1241 | 87 | $33,147 | $381 | premium | 31.8% | (501) 686-8000 |
| 33 | SANFORD CLINIC | SIOUX FALLS | SD | DIAGNOSTIC RADIOLOGY | 276 | 85 | $53,040 | $624 | premium | 30.4% | (605) 328-8700 |
| 34 | SCOTT AND WHITE CLINIC | TEMPLE | TX | PHYSICIAN ASSISTANT | 2435 | 83 | $40,034 | $482 | premium | 4.3% | (254) 724-2663 |
| 35 | HARVARD MEDICAL FACULTY PHYS AT BETH ISRAEL DEACONESS MED CTR INC | BOSTON | MA | INTERNAL MEDICINE | 1689 | 83 | $29,155 | $351 | premium | 5.3% | (781) 983-9088 |
| 36 | FLORIDA CLINICAL PRACTICE ASSOCIATION INC | GAINESVILLE | FL | NURSE PRACTITIONER | 1912 | 83 | $48,425 | $583 | premium | 3.5% | (352) 265-8990 |
| 37 | RUSH UNIVERSITY MEDICAL GROUP | CHICAGO | IL | PHYSICIAN ASSISTANT | 1496 | 82 | $28,044 | $342 | premium | 6.5% | (312) 563-2875 |
| 38 | BRIGHAM AND WOMENS PHYSICIANS ORGANIZATION INC | BOSTON | NY | PHYSICIAN ASSISTANT | 2942 | 81 | $38,151 | $471 | premium | 3.8% | (617) 732-5500 |
| 39 | ASSOCIATES IN MEDICINE AND SURGERY LLC | FORT MYERS | FL | PODIATRY | 17 | 79 | $37,768 | $478 | premium | 3.3% | (239) 481-7000 |
| 40 | UC REGENTS | ORANGE | CA | DIAGNOSTIC RADIOLOGY | 99 | 79 | $37,367 | $473 | premium | 3.1% | (714) 456-7004 |
| 41 | COMMONWEALTH RADIOLOGY PC | RICHMOND | VA | DIAGNOSTIC RADIOLOGY | 49 | 78 | $15,990 | $205 | premium | 6.7% | (804) 288-8327 |
| 42 | RADIOLOGY CONSULTANTS PC | OMAHA | NE | DIAGNOSTIC RADIOLOGY | 46 | 77 | $26,873 | $349 | premium | 26.0% | (402) 717-4760 |
| 43 | STATE UNIVERSITY OF IOWA | IOWA CITY | IA | PHYSICIAN ASSISTANT | 1902 | 76 | $39,656 | $522 | premium | 10.8% | (319) 678-8201 |
| 44 | ROPER RADIOLOGISTS PA | CHARLESTON | SC | DIAGNOSTIC RADIOLOGY | 40 | 76 | $78,408 | $1,032 | premium | 10.9% | (843) 724-2161 |
| 45 | RADIOLOGY REGIONAL CENTER P A | FORT MYERS | FL | DIAGNOSTIC RADIOLOGY | 52 | 75 | $129,029 | $1,720 | premium | 3.1% | (239) 936-2316 |
| 46 | NEW YORK UNIVERSITY | NEW YORK | NY | DIAGNOSTIC RADIOLOGY | 5704 | 75 | $166,632 | $2,222 | premium | 3.5% | (212) 263-9700 |
| 47 | MECKLENBURG RADIOLOGY ASSOCIATES PA | CHARLOTTE | NC | DIAGNOSTIC RADIOLOGY | 94 | 73 | $25,550 | $350 | premium | 5.6% | (704) 332-1291 |
| 48 | DARTMOUTH-HITCHCOCK CLINIC | LEBANON | NH | PHYSICIAN ASSISTANT | 1441 | 72 | $116,098 | $1,612 | premium | 32.7% | (603) 650-5000 |
| 49 | UNIVERSITY HOSPITALS MEDICAL GROUP INC | CLEVELAND | OH | NURSE PRACTITIONER | 2232 | 69 | $24,740 | $359 | premium | 5.8% | — |
| 50 | UMASS MEMORIAL MEDICAL GROUP INC | WORCESTER | MA | PHYSICIAN ASSISTANT | 2483 | 69 | $27,548 | $399 | premium | 4.4% | (508) 334-1000 |
| 51 | DIGNITY HEALTH MEDICAL FOUNDATION | FOLSOM | CA | DIAGNOSTIC RADIOLOGY | 1197 | 68 | $43,575 | $641 | premium | 2.6% | (916) 983-7476 |
| 52 | RADIOLOGY PHYSICIANS INC | DAYTON | OH | DIAGNOSTIC RADIOLOGY | 61 | 67 | $19,162 | $286 | premium | 5.6% | (937) 208-8000 |
| 53 | RADIOLOGY CONSULTANTS OF TULSA, INC. | TULSA | OK | DIAGNOSTIC RADIOLOGY | 34 | 65 | $20,150 | $310 | premium | 20.7% | (918) 743-8838 |
| 54 | TOWER HEALTH MEDICAL GROUP | WEST READING | PA | INTERNAL MEDICINE | 590 | 64 | $20,736 | $324 | premium | 5.6% | (484) 628-5455 |
| 55 | DRS HARRIS BIRKHILL WANG SONGE AND ASSOC PC | DEARBORN | MI | DIAGNOSTIC RADIOLOGY | 62 | 63 | $17,388 | $276 | premium | 5.3% | (313) 593-7301 |
| 56 | LAKE MEDICAL IMAGING AND BREAST CENTER AT THE VILLAGES LLC | LEESBURG | FL | DIAGNOSTIC RADIOLOGY | 22 | 63 | $65,016 | $1,032 | premium | 2.6% | (352) 787-5858 |
| 57 | DUKE HEALTH INTEGRATED PRACTICE INC | DURHAM | NC | PHYSICIAN ASSISTANT | 3051 | 61 | $38,723 | $635 | premium | 4.7% | (919) 684-8111 |
| 58 | MEDICAL CENTER RADIOLOGISTS INC | NORFOLK | VA | DIAGNOSTIC RADIOLOGY | 123 | 61 | $39,894 | $654 | premium | 5.2% | (757) 466-6870 |
| 59 | UNIVERSITY OF MIAMI | MIAMI | FL | NURSE PRACTITIONER | 2331 | 61 | $38,138 | $625 | premium | 2.5% | (305) 689-5437 |
| 60 | COOPER UNIVERSITY RADIOLOGY PC | CAMDEN | NJ | DIAGNOSTIC RADIOLOGY | 68 | 59 | $54,575 | $925 | premium | 9.8% | — |
| 61 | ASSOCIATION OF UNIVERSITY RADIOLOGISTS, PC | KNOXVILLE | TN | DIAGNOSTIC RADIOLOGY | 35 | 59 | $22,656 | $384 | premium | 8.7% | (865) 305-9661 |
| 62 | RADIOLOGY LTD LLC | TUCSON | AZ | DIAGNOSTIC RADIOLOGY | 102 | 58 | $129,168 | $2,227 | premium | 8.9% | (520) 290-4842 |
| 63 | UNMC PHYSICIANS | OMAHA | NE | PHYSICIAN ASSISTANT | 1514 | 58 | $19,065 | $329 | premium | 19.6% | (402) 559-4000 |
| 64 | VANTAGE RADIOLOGY AND DIAGNOSTIC SERVICES, A PROFESSIONAL SERVICES COR | RENTON | WA | DIAGNOSTIC RADIOLOGY | 43 | 57 | $16,815 | $295 | premium | 5.8% | (425) 277-8346 |
| 65 | MERCY CLINIC SPRINGFIELD COMMUNITIES | SPRINGFIELD | MO | PHYSICIAN ASSISTANT | 1128 | 57 | $22,800 | $400 | premium | 4.6% | — |
| 66 | STONY BROOK RADIOLOGY, UNIVERSITY FACULTY PRACTICE CORPORATION | STONY BROOK | NY | DIAGNOSTIC RADIOLOGY | 59 | 57 | $91,917 | $1,613 | premium | 2.6% | (631) 638-2121 |
| 67 | STATE OF MISSISSIPPI - UNIVERSITY OF MISSISSIPPI MEDICAL CENTER | JACKSON | MS | NURSE PRACTITIONER | 951 | 55 | $24,200 | $440 | premium | 17.1% | (601) 815-4775 |
| 68 | ADVANCED BERKSHIRE MEDICAL IMAGING PC | PITTSFIELD | NY | DIAGNOSTIC RADIOLOGY | 11 | 54 | $19,440 | $360 | premium | 2.5% | (413) 447-2451 |
| 69 | RADIOLOGY CONSULTANTS OF IOWA PLC | CEDAR RAPIDS | IA | DIAGNOSTIC RADIOLOGY | 72 | 54 | $19,062 | $353 | premium | 7.7% | (319) 364-0121 |
| 70 | LAHEY CLINIC INC | BURLINGTON | MA | NURSE PRACTITIONER | 1400 | 54 | $26,024 | $482 | premium | 3.5% | — |
| 71 | IHC HEALTH SERVICES INC | MURRAY | UT | PHYSICIAN ASSISTANT | 3944 | 54 | $37,541 | $695 | premium | 30.2% | (801) 261-8346 |
| 72 | ROCKINGHAM RADIOLOGISTS | ROCKINGHAM | VA | DIAGNOSTIC RADIOLOGY | 11 | 52 | $16,744 | $322 | premium | 4.5% | (540) 432-8951 |
| 73 | JOHNS HOPKINS UNIVERSITY | BALTIMORE | MD | NURSE PRACTITIONER | 2900 | 51 | $77,216 | $1,514 | premium | 10.6% | (410) 502-4340 |
| 74 | NORTHLAND RADIOLOGY INC | N KANSAS CITY | MO | DIAGNOSTIC RADIOLOGY | 15 | 51 | $15,351 | $301 | premium | 4.1% | (913) 642-4900 |
| 75 | LENOX HILL RADIOLOGY AND MEDICAL IMAGING ASSOCIATES PC | NEW YORK | MI | DIAGNOSTIC RADIOLOGY | 244 | 51 | $18,213 | $357 | premium | 4.3% | (212) 772-3111 |
| 76 | DIAGNOSTIC IMAGING ASSOCIATES, P.C. | DES MOINES | IA | DIAGNOSTIC RADIOLOGY | 21 | 50 | $22,350 | $447 | premium | 7.1% | (515) 643-2667 |
| 77 | SOUTH SHORE RADIOLOGICAL ASSOCIATES INC | SOUTH WEYMOUTH | MA | DIAGNOSTIC RADIOLOGY | 36 | 49 | $17,297 | $353 | premium | 3.1% | (781) 340-8000 |
| 78 | RADIOLOGY CONSULTANTS OF IOWA PLC | CEDAR RAPIDS | OH | DIAGNOSTIC RADIOLOGY | 72 | 49 | $57,977 | $1,183 | premium | 4.1% | (319) 364-0121 |
| 79 | RADIOLOGY REGIONAL CENTER P A | FORT MYERS | PR | DIAGNOSTIC RADIOLOGY | 52 | 48 | $12,996 | $271 | premium | 100.0% | (239) 936-2316 |
| 80 | UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL | CHAPEL HILL | MI | NURSE PRACTITIONER | 2120 | 48 | $16,611 | $346 | premium | 4.0% | (984) 215-5556 |
| 81 | RADIOLOGY ASSOCIATES OF NORTH TEXAS PA | FORT WORTH | TX | DIAGNOSTIC RADIOLOGY | 340 | 47 | $19,975 | $425 | premium | 2.4% | (817) 321-0470 |
| 82 | WINCHESTER RADIOLOGISTS PC | WINCHESTER | VA | DIAGNOSTIC RADIOLOGY | 79 | 47 | $23,688 | $504 | premium | 4.0% | (540) 686-1600 |
| 83 | COMMUNITY RADIOLOGY ASSOCIATES INC | FREDERICK | NJ | DIAGNOSTIC RADIOLOGY | 62 | 47 | $79,242 | $1,686 | premium | 7.8% | (888) 601-0943 |
| 84 | PROGRESSIVE PHYSICIAN ASSOC INC | PHILLIPSBURG | PA | DIAGNOSTIC RADIOLOGY | 160 | 47 | $19,129 | $407 | premium | 4.1% | (908) 859-6700 |
| 85 | ADVANCED RADIOLOGY P A | BALTIMORE | MD | DIAGNOSTIC RADIOLOGY | 161 | 47 | $77,869 | $1,657 | premium | 9.8% | (888) 972-9700 |
| 86 | KETTERING NETWORK RADIOLOGISTS INC | DAYTON | OH | DIAGNOSTIC RADIOLOGY | 74 | 46 | $14,214 | $309 | premium | 3.8% | (937) 558-3800 |
| 87 | TEMPLE FACULTY PRACTICE PLAN INC | PHILADELPHIA | PA | PHYSICIAN ASSISTANT | 1330 | 46 | $16,100 | $350 | premium | 4.0% | — |
| 88 | MEMPHIS RADIOLOGICAL PC | MEMPHIS | TN | DIAGNOSTIC RADIOLOGY | 51 | 45 | $16,290 | $362 | premium | 6.7% | (901) 561-6000 |
| 89 | CHAMBERSBURG IMAGING ASSOCIATES P.C. | CHAMBERSBURG | PA | DIAGNOSTIC RADIOLOGY | 13 | 43 | $12,900 | $300 | premium | 3.7% | (717) 263-1383 |
| 90 | SOUTHERN NEW ENGLAND RADIOLOGY INC | FALL RIVER | MA | DIAGNOSTIC RADIOLOGY | 22 | 42 | $13,650 | $325 | premium | 2.7% | (508) 679-7136 |
| 91 | WASHINGTON UNIVERSITY | SAINT LOUIS | MO | NURSE PRACTITIONER | 3070 | 42 | $34,188 | $814 | premium | 3.4% | (314) 747-3000 |
| 92 | OU HEALTH PARTNERS INC | OKLAHOMA CITY | OK | PHYSICIAN ASSISTANT | 1160 | 42 | $16,573 | $395 | premium | 13.4% | (405) 271-4311 |
| 93 | CITY OF HOPE MEDICAL FOUNDATION | DUARTE | CA | NURSE PRACTITIONER | 942 | 42 | $11,340 | $270 | premium | 1.6% | (626) 256-4673 |
| 94 | NEW YORK UNIVERSITY | NEW YORK | TN | DIAGNOSTIC RADIOLOGY | 5704 | 42 | $87,626 | $2,086 | premium | 6.2% | (212) 263-9700 |
| 95 | WEST VIRGINIA UNIVERSITY MEDICAL CORPORATION | MORGANTOWN | WV | PHYSICIAN ASSISTANT | 1996 | 41 | $14,760 | $360 | premium | 44.6% | (304) 598-4865 |
| 96 | SVMHS CLINICS | SALINAS | CA | PHYSICIAN ASSISTANT | 245 | 40 | $11,076 | $277 | premium | 1.5% | (831) 422-3636 |
| 97 | UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL | CHAPEL HILL | NC | NURSE PRACTITIONER | 2120 | 40 | $13,855 | $346 | premium | 3.1% | (984) 215-5556 |
| 98 | BIRMINGHAM PHYSICIANS RADIOLOGY PLLC | BIRMINGHAM | AL | NEUROLOGY | 3 | 39 | $93,600 | $2,400 | premium | 17.6% | (205) 823-3366 |
| 99 | UNIVERSITY OF CHICAGO | CHICAGO | IL | NURSE PRACTITIONER | 1662 | 39 | $33,870 | $868 | premium | 3.1% | (888) 824-0200 |
| 100 | UNIVERSITY OF UTAH ADULT SERVICES | SALT LAKE CITY | CO | PHYSICIAN ASSISTANT | 1783 | 39 | $20,499 | $526 | premium | 5.6% | (801) 581-2121 |
Showing the top 100 of 238 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 →