70544 — Mri scan of blood vessels of head without contrast
44,303 observed fee-for-service (50%) · ~44,213 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 | 70544 svcs | Submitted charges | Avg charge | Medicare $ locked column | Share* | Phone |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | NEW YORK UNIVERSITY | NEW YORK | NY | DIAGNOSTIC RADIOLOGY | 5704 | 1,850 | $2,969,898 | $1,605 | premium | 12.8% | (212) 263-9700 |
| 2 | STANFORD HEALTH CARE | STANFORD | CA | DIAGNOSTIC RADIOLOGY | 3039 | 1,590 | $1,056,124 | $664 | premium | 11.5% | (650) 723-4000 |
| 3 | ZWANGER AND PESIRI RADIOLOGY GROUP LLP | LINDENHURST | NY | DIAGNOSTIC RADIOLOGY | 91 | 1,413 | $1,517,344 | $1,074 | premium | 9.8% | (631) 225-7200 |
| 4 | SUTTER VALLEY MEDICAL FOUNDATION | SACRAMENTO | CA | DIAGNOSTIC RADIOLOGY | 2420 | 831 | $981,402 | $1,181 | premium | 6.0% | (916) 681-8852 |
| 5 | MASSACHUSETTS GENERAL PHYSICIANS ORGANIZATION INC | BOSTON | MA | DIAGNOSTIC RADIOLOGY | 3532 | 815 | $855,771 | $1,050 | premium | 14.4% | (617) 724-0287 |
| 6 | CHARLOTTE RADIOLOGY PA | CHARLOTTE | NC | DIAGNOSTIC RADIOLOGY | 218 | 786 | $256,236 | $326 | premium | 17.7% | (704) 362-1945 |
| 7 | MORI BEAN AND BROOKS INC | ORANGE PARK | FL | DIAGNOSTIC RADIOLOGY | 947 | 717 | $340,652 | $475 | premium | 8.3% | (904) 399-5550 |
| 8 | BRIGHAM AND WOMENS PHYSICIANS ORGANIZATION INC | BOSTON | MA | PHYSICIAN ASSISTANT | 2942 | 708 | $181,687 | $257 | premium | 12.5% | (617) 732-5500 |
| 9 | HOUSTON RADIOLOGY ASSOCIATED | HOUSTON | TX | DIAGNOSTIC RADIOLOGY | 103 | 657 | $280,944 | $428 | premium | 10.2% | (281) 206-9020 |
| 10 | ADVANCED RADIOLOGY P A | BALTIMORE | MD | DIAGNOSTIC RADIOLOGY | 161 | 626 | $557,272 | $890 | premium | 11.2% | (888) 972-9700 |
| 11 | NORTHWESTERN MEDICAL FACULTY FOUNDATION | CHICAGO | IL | NURSE PRACTITIONER | 4339 | 487 | $182,987 | $376 | premium | 12.6% | — |
| 12 | MASS GENERAL BRIGHAM COMMUNITY PHYSICIANS INC | MEDFORD | MA | DIAGNOSTIC RADIOLOGY | 424 | 486 | $114,757 | $236 | premium | 8.6% | (781) 395-4909 |
| 13 | DIGNITY HEALTH MEDICAL FOUNDATION | FOLSOM | CA | DIAGNOSTIC RADIOLOGY | 1197 | 485 | $276,444 | $570 | premium | 3.5% | (916) 983-7476 |
| 14 | BEAUMONT MEDICAL GROUP HOSPITAL BASED SERVICES | TROY | MI | DIAGNOSTIC RADIOLOGY | 583 | 469 | $232,051 | $495 | premium | 20.1% | (248) 964-1187 |
| 15 | HAMPTON ROADS RADIOLOGY ASSOCIATES PC | VIRGINIA BEACH | VA | DIAGNOSTIC RADIOLOGY | 37 | 431 | $87,924 | $204 | premium | 10.4% | (757) 916-9630 |
| 16 | MAYO CLINIC ARIZONA | PHOENIX | AZ | PHYSICIAN ASSISTANT | 1635 | 415 | $285,410 | $688 | premium | 10.1% | (800) 603-0558 |
| 17 | STONY BROOK RADIOLOGY, UNIVERSITY FACULTY PRACTICE CORPORATION | STONY BROOK | NY | DIAGNOSTIC RADIOLOGY | 59 | 415 | $335,796 | $809 | premium | 2.9% | (631) 638-2121 |
| 18 | RADIOLOGY LTD LLC | TUCSON | AZ | DIAGNOSTIC RADIOLOGY | 102 | 396 | $511,469 | $1,292 | premium | 9.7% | (520) 290-4842 |
| 19 | JOHNS HOPKINS UNIVERSITY | BALTIMORE | NC | NURSE PRACTITIONER | 2900 | 387 | $116,100 | $300 | premium | 8.7% | (410) 502-4340 |
| 20 | UNIVERSITY HOSPITALS MEDICAL GROUP INC | CLEVELAND | OH | NURSE PRACTITIONER | 2232 | 370 | $83,990 | $227 | premium | 10.3% | — |
| 21 | NEW YORK UNIVERSITY | NEW YORK | PA | DIAGNOSTIC RADIOLOGY | 5704 | 365 | $693,239 | $1,899 | premium | 7.4% | (212) 263-9700 |
| 22 | NORTHSIDE RADIOLOGY ASSOCIATES LLC | ATLANTA | GA | DIAGNOSTIC RADIOLOGY | 370 | 343 | $266,168 | $776 | premium | 11.3% | (404) 851-6577 |
| 23 | COMMONWEALTH RADIOLOGY PC | RICHMOND | VA | DIAGNOSTIC RADIOLOGY | 49 | 338 | $52,390 | $155 | premium | 8.2% | (804) 288-8327 |
| 24 | REGENTS OF THE UNIVERSITY OF CALIFORNIA | SAN DIEGO | CA | DIAGNOSTIC RADIOLOGY | 2057 | 333 | $309,517 | $929 | premium | 2.4% | (800) 926-8273 |
| 25 | NEW YORK UNIVERSITY | NEW YORK | CO | DIAGNOSTIC RADIOLOGY | 5704 | 318 | $557,958 | $1,755 | premium | 26.0% | (212) 263-9700 |
| 26 | ENDEAVOR HEALTH MEDICAL GROUP | EVANSTON | IL | NURSE PRACTITIONER | 3380 | 298 | $62,112 | $208 | premium | 7.7% | — |
| 27 | MEDICAL CENTER RADIOLOGISTS INC | NORFOLK | VA | DIAGNOSTIC RADIOLOGY | 123 | 292 | $53,728 | $184 | premium | 7.1% | (757) 466-6870 |
| 28 | RUSH UNIVERSITY MEDICAL GROUP | CHICAGO | IL | PHYSICIAN ASSISTANT | 1496 | 284 | $54,812 | $193 | premium | 7.4% | (312) 563-2875 |
| 29 | SILICON VALLEY MEDICAL IMAGING INC A MEDICAL CORPORATION | FREMONT | CA | NUCLEAR MEDICINE | 3 | 278 | $332,600 | $1,196 | premium | 2.0% | (510) 792-9700 |
| 30 | NEURO INTERVENTIONAL AND DIAGNOSTIC ASSOCIATES, PC | LEES SUMMIT | MO | DIAGNOSTIC RADIOLOGY | 5 | 277 | $67,034 | $242 | premium | 18.8% | (816) 347-5000 |
| 31 | SDMI, LLC | LAS VEGAS | NV | DIAGNOSTIC RADIOLOGY | 36 | 265 | $318,487 | $1,202 | premium | 21.5% | (702) 732-6000 |
| 32 | ROPER RADIOLOGISTS PA | CHARLESTON | SC | DIAGNOSTIC RADIOLOGY | 40 | 257 | $201,891 | $786 | premium | 22.3% | (843) 724-2161 |
| 33 | NEW YORK UNIVERSITY | NEW YORK | WA | DIAGNOSTIC RADIOLOGY | 5704 | 253 | $488,897 | $1,932 | premium | 13.3% | (212) 263-9700 |
| 34 | SCOTT AND WHITE CLINIC | TEMPLE | TX | PHYSICIAN ASSISTANT | 2435 | 249 | $66,979 | $269 | premium | 3.9% | (254) 724-2663 |
| 35 | MONTEFIORE MEDICAL CENTER | BRONX | NY | PHYSICAL THERAPIST IN PRIVATE PRACTICE | 2796 | 246 | $185,430 | $754 | premium | 1.7% | (866) 633-8255 |
| 36 | RADIOLOGY ASSOCIATES OF NORTH TEXAS PA | FORT WORTH | TX | DIAGNOSTIC RADIOLOGY | 340 | 245 | $58,310 | $238 | premium | 3.8% | (817) 321-0470 |
| 37 | SOUTHWEST NEURO-IMAGING LTD | PHOENIX | AZ | DIAGNOSTIC RADIOLOGY | 8 | 242 | $64,188 | $265 | premium | 5.9% | (602) 954-6228 |
| 38 | LAKELAND RADIOLOGISTS P A | FLOWOOD | MS | DIAGNOSTIC RADIOLOGY | 29 | 238 | $69,020 | $290 | premium | 35.5% | (601) 936-2390 |
| 39 | NORTH METROPOLITAN RADIOLOGY ASSOCIATES LLP | LAWRENCEVILLE | GA | DIAGNOSTIC RADIOLOGY | 44 | 233 | $71,997 | $309 | premium | 7.6% | (678) 312-0900 |
| 40 | SUTTER BAY MEDICAL FOUNDATION | PALO ALTO | CA | INTERNAL MEDICINE | 3716 | 232 | $610,294 | $2,631 | premium | 1.7% | (415) 600-1020 |
| 41 | OPTUM MEDICAL CARE PC | MOUNT KISCO | NY | INTERNAL MEDICINE | 1040 | 231 | $244,093 | $1,057 | premium | 1.6% | (914) 241-1050 |
| 42 | PRISMA HEALTH UNIVERSITY MEDICAL GROUP | GREENVILLE | SC | NURSE PRACTITIONER | 2447 | 222 | $39,738 | $179 | premium | 19.2% | — |
| 43 | MECKLENBURG RADIOLOGY ASSOCIATES PA | CHARLOTTE | NC | DIAGNOSTIC RADIOLOGY | 94 | 222 | $59,940 | $270 | premium | 5.0% | (704) 332-1291 |
| 44 | SOUTHERN DELAWARE IMAGING ASSOC | LEWES | DE | DIAGNOSTIC RADIOLOGY | 40 | 220 | $41,140 | $187 | premium | 13.8% | (302) 645-3636 |
| 45 | MEDICAL SERVICES OF KIPS BAY PC | GREAT NECK | NY | DIAGNOSTIC RADIOLOGY | 14 | 219 | $681,522 | $3,112 | premium | 1.5% | (516) 487-4464 |
| 46 | NORTH COUNTRY NEUROLOGY PC | WATERTOWN | NY | NEUROLOGY | 5 | 215 | $483,750 | $2,250 | premium | 1.5% | (315) 782-9003 |
| 47 | ADVANCED RADIOLOGY SERVICES PC | GRAND RAPIDS | MI | DIAGNOSTIC RADIOLOGY | 249 | 214 | $60,629 | $283 | premium | 9.1% | (616) 363-7272 |
| 48 | LENOX HILL RADIOLOGY AND MEDICAL IMAGING ASSOCIATES PC | NEW YORK | AZ | DIAGNOSTIC RADIOLOGY | 244 | 213 | $53,262 | $250 | premium | 5.2% | (212) 772-3111 |
| 49 | SCRIPPS HEALTH | LA JOLLA | CA | PHYSICIAN ASSISTANT | 1431 | 205 | $105,869 | $516 | premium | 1.5% | (858) 455-9100 |
| 50 | COMMUNITY RADIOLOGY ASSOCIATES INC | FREDERICK | MD | DIAGNOSTIC RADIOLOGY | 62 | 205 | $247,845 | $1,209 | premium | 3.7% | (888) 601-0943 |
| 51 | SINAI HOSPITAL OF BALTIMORE, INC | BALTIMORE | MD | PHYSICIAN ASSISTANT | 386 | 200 | $57,000 | $285 | premium | 3.6% | — |
| 52 | MAYO CLINIC JACKSONVILLE | JACKSONVILLE | FL | NURSE PRACTITIONER | 1587 | 197 | $605,693 | $3,075 | premium | 2.3% | (904) 953-2000 |
| 53 | RADIOLOGY OF HUNSTVILLE PC | HUNTSVILLE | AL | DIAGNOSTIC RADIOLOGY | 63 | 190 | $39,123 | $206 | premium | 8.1% | 2565390457145 |
| 54 | RADIOLOGY ASSOCIATES OF RICHMOND INC | RICHMOND | VA | DIAGNOSTIC RADIOLOGY | 70 | 184 | $32,640 | $177 | premium | 4.4% | (804) 272-8806 |
| 55 | KERN RADIOLOGY MEDICAL GROUP INC | BAKERSFIELD | CA | DIAGNOSTIC RADIOLOGY | 87 | 183 | $125,934 | $688 | premium | 1.3% | (661) 616-1458 |
| 56 | RADIOLOGY REGIONAL CENTER P A | FORT MYERS | FL | DIAGNOSTIC RADIOLOGY | 52 | 177 | $194,285 | $1,098 | premium | 2.1% | (239) 936-2316 |
| 57 | BEVERLY RADIOLOGY MEDICAL GROUP III | GARDEN GROVE | CA | DIAGNOSTIC RADIOLOGY | 328 | 172 | $191,422 | $1,113 | premium | 1.2% | — |
| 58 | RADIOLOGY PHYSICIANS INC | DAYTON | OH | DIAGNOSTIC RADIOLOGY | 61 | 169 | $31,941 | $189 | premium | 4.7% | (937) 208-8000 |
| 59 | CLEVELAND CLINIC FLORIDA | WESTON | FL | NURSE PRACTITIONER | 720 | 168 | $145,351 | $865 | premium | 2.0% | (954) 659-5000 |
| 60 | MAYO CLINIC | ROCHESTER | MN | NURSE PRACTITIONER | 4896 | 168 | $442,671 | $2,635 | premium | 3.9% | (507) 284-2511 |
| 61 | NEURO IR OF EAST TEXAS | TYLER | TX | DIAGNOSTIC RADIOLOGY | 3 | 168 | $48,888 | $291 | premium | 2.6% | (903) 705-0072 |
| 62 | AMERICAN RADIOLOGY CONSULTANTS PLLC | DALLAS | TX | DIAGNOSTIC RADIOLOGY | 121 | 167 | $35,738 | $214 | premium | 2.6% | (214) 820-3216 |
| 63 | EASTERN RADIOLOGISTS INC | GREENVILLE | NC | DIAGNOSTIC RADIOLOGY | 93 | 167 | $78,674 | $471 | premium | 3.8% | (252) 752-5000 |
| 64 | RHODE ISLAND MEDICAL IMAGING INC | EAST PROVIDENCE | RI | DIAGNOSTIC RADIOLOGY | 109 | 166 | $85,424 | $515 | premium | 70.9% | (401) 626-3900 |
| 65 | FPA HOSPITAL BASED | NEW YORK | NY | DIAGNOSTIC RADIOLOGY | 427 | 163 | $96,243 | $590 | premium | 1.1% | (212) 252-6004 |
| 66 | MEDICAL IMAGING OF LEHIGH VALLEY PC | ALLENTOWN | PA | DIAGNOSTIC RADIOLOGY | 119 | 163 | $52,486 | $322 | premium | 3.3% | (610) 770-1606 |
| 67 | RADIOLOGY CONSULTANTS PC | OMAHA | NE | DIAGNOSTIC RADIOLOGY | 46 | 155 | $32,550 | $210 | premium | 42.0% | (402) 717-4760 |
| 68 | RADIOLOGY ASSOCIATES OF RIDGEWOOD P A | WALDWICK | NJ | DIAGNOSTIC RADIOLOGY | 20 | 155 | $81,720 | $527 | premium | 3.6% | (201) 445-8822 |
| 69 | VIRGINIA MASON MEDICAL CENTER | SEATTLE | WA | PHYSICIAN ASSISTANT | 879 | 148 | $50,047 | $338 | premium | 7.8% | (206) 223-6600 |
| 70 | REGENTS OF THE UNIV OF CA | SACRAMENTO | CA | DIAGNOSTIC RADIOLOGY | 1608 | 148 | $50,320 | $340 | premium | 1.1% | (877) 827-7463 |
| 71 | UMASS MEMORIAL MEDICAL GROUP INC | WORCESTER | MA | PHYSICIAN ASSISTANT | 2483 | 143 | $41,972 | $294 | premium | 2.5% | (508) 334-1000 |
| 72 | NEW YORK UNIVERSITY | NEW YORK | MA | DIAGNOSTIC RADIOLOGY | 5704 | 140 | $244,596 | $1,747 | premium | 2.5% | (212) 263-9700 |
| 73 | PACIFIC RADIOLOGY GROUP INC | KAILUA | HI | DIAGNOSTIC RADIOLOGY | 29 | 138 | $26,220 | $190 | premium | 21.8% | (808) 263-5500 |
| 74 | IHC HEALTH SERVICES INC | MURRAY | UT | PHYSICIAN ASSISTANT | 3944 | 134 | $76,114 | $568 | premium | 24.0% | (801) 261-8346 |
| 75 | YALE UNIVERSITY | NEW HAVEN | CT | PHYSICIAN ASSISTANT | 2649 | 132 | $34,056 | $258 | premium | 12.6% | (203) 688-4242 |
| 76 | UNIVERSITY HOSPITALS MEDICAL GROUP INC | CLEVELAND | MD | NURSE PRACTITIONER | 2232 | 132 | $29,964 | $227 | premium | 2.4% | — |
| 77 | ANCILLARY SERVICES OF PRACTICE ASSOCIATES PA | MORRISTOWN | NJ | DIAGNOSTIC RADIOLOGY | 97 | 131 | $26,069 | $199 | premium | 3.1% | (973) 971-6866 |
| 78 | DUKE HEALTH INTEGRATED PRACTICE INC | DURHAM | NC | PHYSICIAN ASSISTANT | 3051 | 130 | $51,870 | $399 | premium | 2.9% | (919) 684-8111 |
| 79 | COMMUNITY RADIOLOGY ASSOCIATES INC | FREDERICK | DC | DIAGNOSTIC RADIOLOGY | 62 | 124 | $149,916 | $1,209 | premium | 11.4% | (888) 601-0943 |
| 80 | PARLEE AND TATEM RADIOLOGIC ASSOCIATES LTD | DOYLESTOWN | PA | DIAGNOSTIC RADIOLOGY | 15 | 124 | $38,563 | $311 | premium | 2.5% | (215) 345-2290 |
| 81 | SMI IMAGING LLC | PHOENIX | AZ | DIAGNOSTIC RADIOLOGY | 364 | 124 | $202,740 | $1,635 | premium | 3.0% | (480) 753-6161 |
| 82 | EAST RIVER MEDICAL IMAGING PC | NEW YORK | NY | DIAGNOSTIC RADIOLOGY | 10 | 122 | $231,800 | $1,900 | premium | 0.8% | (212) 288-7615 |
| 83 | COLUMBUS RADIOLOGY CORP | COLUMBUS | NC | DIAGNOSTIC RADIOLOGY | 288 | 119 | $82,303 | $692 | premium | 2.7% | (614) 228-7231 |
| 84 | CALIFORNIA MANAGED IMAGING MEDICAL GROUP INC | SANTA BARBARA | CA | DIAGNOSTIC RADIOLOGY | 64 | 118 | $173,945 | $1,474 | premium | 0.9% | (800) 841-4236 |
| 85 | RED RIVER CONSULTANTS INC | SHREVEPORT | LA | DIAGNOSTIC RADIOLOGY | 60 | 118 | $27,612 | $234 | premium | 21.4% | (318) 212-4550 |
| 86 | SPRINGFIELD CLINIC, LLP | SPRINGFIELD | IL | NURSE PRACTITIONER | 686 | 115 | $137,931 | $1,199 | premium | 3.0% | (217) 544-6464 |
| 87 | RADIOLOGY SUBSPECIALISTS OF NORTHERN ILLINOIS LLC | GENEVA | IL | DIAGNOSTIC RADIOLOGY | 32 | 113 | $47,639 | $422 | premium | 2.9% | (630) 208-4412 |
| 88 | HOUSTON RADIOLOGY ASSOCIATED | HOUSTON | IN | DIAGNOSTIC RADIOLOGY | 103 | 110 | $46,894 | $426 | premium | 13.2% | (281) 206-9020 |
| 89 | COLUMBUS RADIOLOGY CORP | COLUMBUS | OH | DIAGNOSTIC RADIOLOGY | 288 | 109 | $84,584 | $776 | premium | 3.0% | (614) 228-7231 |
| 90 | HAMPTON ROADS RADIOLOGY ASSOCIATES PC | VIRGINIA BEACH | GA | DIAGNOSTIC RADIOLOGY | 37 | 109 | $22,236 | $204 | premium | 3.6% | (757) 916-9630 |
| 91 | RADIOLOGY CONSULTANTS OF TULSA, INC. | TULSA | OK | DIAGNOSTIC RADIOLOGY | 34 | 107 | $18,511 | $173 | premium | 28.6% | (918) 743-8838 |
| 92 | UNIVERSITY OF CINCINNATI PHYSICIANS COMPANY LLC | CINCINNATI | OH | NURSE PRACTITIONER | 1504 | 106 | $17,808 | $168 | premium | 2.9% | (513) 584-1000 |
| 93 | RIVERSIDE RADIOLOGY AND INTERVENTIONAL ASSOCIATES INC | COLUMBUS | KY | DIAGNOSTIC RADIOLOGY | 243 | 103 | $22,763 | $221 | premium | 20.8% | (614) 566-5600 |
| 94 | PROGRESSIVE PHYSICIAN ASSOC INC | PHILLIPSBURG | PA | DIAGNOSTIC RADIOLOGY | 160 | 102 | $23,154 | $227 | premium | 2.1% | (908) 859-6700 |
| 95 | WINCHESTER RADIOLOGISTS PC | WINCHESTER | VA | DIAGNOSTIC RADIOLOGY | 79 | 101 | $28,482 | $282 | premium | 2.4% | (540) 686-1600 |
| 96 | SARAH BUSH LINCOLN HEALTH CENTER | MATTOON | IL | NURSE PRACTITIONER | 405 | 100 | $46,830 | $468 | premium | 2.6% | — |
| 97 | MORI BEAN AND BROOKS INC | ORANGE PARK | DE | DIAGNOSTIC RADIOLOGY | 947 | 98 | $43,218 | $441 | premium | 6.1% | (904) 399-5550 |
| 98 | STRAUB CLINIC AND HOSPITAL | HONOLULU | HI | NURSE PRACTITIONER | 431 | 98 | $14,112 | $144 | premium | 15.5% | (808) 522-4000 |
| 99 | ALLEGANY IMAGING PC | CUMBERLAND | MD | DIAGNOSTIC RADIOLOGY | 10 | 98 | $22,932 | $234 | premium | 1.8% | (240) 964-1036 |
| 100 | TOLEDO RADIOLOGICAL ASSOCIATES INC | COLDWATER | OH | DIAGNOSTIC RADIOLOGY | 51 | 97 | $17,136 | $177 | premium | 2.7% | (517) 279-5400 |
Showing the top 100 of 427 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 →