10,086 observed fee-for-service (50%) · ~10,218 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 payer split, and this market total scaled to all of Medicare, labeled as an estimate.
Or just look at it: nuclear heart imaging (78452) in Arizona is open as a live example — the full paid view, real data.
View the live example →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 activate to sort | City activate to sort | St activate to sort | Specialty activate to sort | Providers activate to sort | 57288 svcs sorted descending — activate to reverse | Submitted charges activate to sort | Avg charge activate to sort | Medicare $ locked column | Share* activate to sort | Phone |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | SUTTER BAY MEDICAL FOUNDATION | PALO ALTO | CA | INTERNAL MEDICINE | 3716 | 268 | $613,326 | $2,289 | premium | 18.5% | (415) 600-1020 |
| 2 | UROGYNECOLOGY CONSULTANTS MEDICAL CORPORATION | ROSEVILLE | CA | UNDEFINED PHYSICIAN TYPE (SPECIFY) | 4 | 255 | $312,987 | $1,227 | premium | 17.6% | (916) 772-5533 |
| 3 | PRIVIA MEDICAL GROUP GULF COAST PLLC | HOUSTON | TX | NURSE PRACTITIONER | 515 | 228 | $366,137 | $1,606 | premium | 16.5% | (713) 512-7500 |
| 4 | FLORIDA HOSPITAL MEDICAL GROUP INC | MAITLAND | FL | PHYSICIAN ASSISTANT | 1634 | 212 | $328,114 | $1,548 | premium | 13.7% | (407) 200-2700 |
| 5 | HEALTHTEXAS PROVIDER NETWORK | DALLAS | TX | PHYSICIAN ASSISTANT | 2482 | 195 | $628,875 | $3,225 | premium | 14.1% | — |
| 6 | HACKENSACK MERIDIAN HEALTH MEDICAL GROUP - SPECIALTY CARE PC | NEPTUNE | NJ | NURSE PRACTITIONER | 1878 | 158 | $332,601 | $2,105 | premium | 31.7% | (732) 362-3663 |
| 7 | REGIONAL WOMENS HEALTH GROUP LLC | VOORHEES | PA | OBSTETRICS/GYNECOLOGY | 352 | 155 | $841,650 | $5,430 | premium | 25.8% | (856) 424-3323 |
| 8 | ILLINOIS UROGYNECOLOGY LTD | PARK RIDGE | IL | OBSTETRICS/GYNECOLOGY | 6 | 148 | $247,752 | $1,674 | premium | 17.2% | (847) 825-1590 |
| 9 | NORTH SHORE-LIJ MEDICAL PC | MANHASSET | NY | PHYSICIAN ASSISTANT | 6294 | 133 | $468,668 | $3,524 | premium | 23.4% | — |
| 10 | UROLOGY OF INDIANA LLC | GREENWOOD | IN | PHYSICIAN ASSISTANT | 83 | 129 | $454,080 | $3,520 | premium | 35.3% | (317) 859-7222 |
| 11 | INSTITUTE FOR WOMEN'S HEALTH AND BODY LLC | WEST PALM BEACH | FL | OBSTETRICS/GYNECOLOGY | 49 | 115 | $407,370 | $3,542 | premium | 7.4% | (561) 616-9988 |
| 12 | BAYSTATE MEDICAL PRACTICES INC | SPRINGFIELD | MA | PHYSICIAN ASSISTANT | 1326 | 109 | $174,967 | $1,605 | premium | 26.5% | — |
| 13 | COMMUNITY FOUNDATION MEDICAL GROUP | FRESNO | CA | PHYSICIAN ASSISTANT | 292 | 106 | $232,354 | $2,192 | premium | 7.3% | — |
| 14 | HEALTH FIRST MEDICAL GROUP, LLC | MELBOURNE | FL | NURSE PRACTITIONER | 669 | 99 | $98,785 | $998 | premium | 6.4% | (321) 434-8878 |
| 15 | VIRGINIA PHYSICIANS FOR WOMEN, LTD | NORTH CHESTERFIELD | VA | OBSTETRICS/GYNECOLOGY | 45 | 93 | $84,455 | $908 | premium | 22.7% | (804) 897-2100 |
| 16 | MASSACHUSETTS GENERAL PHYSICIANS ORGANIZATION INC | BOSTON | MA | DIAGNOSTIC RADIOLOGY | 3532 | 91 | $291,909 | $3,208 | premium | 22.1% | (617) 724-0287 |
| 17 | WOMAN'S CENTER FOR ADVANCED PELVIC SURGERY PLLP | MESA | AZ | NURSE PRACTITIONER | 9 | 85 | $140,063 | $1,648 | premium | 14.7% | (480) 834-5111 |
| 18 | BASINSKI LLC | NEWBURGH | IN | OBSTETRICS/GYNECOLOGY | 3 | 78 | $176,125 | $2,258 | premium | 21.4% | (812) 853-3500 |
| 19 | ENDEAVOR HEALTH MEDICAL GROUP | EVANSTON | IL | NURSE PRACTITIONER | 3380 | 78 | $194,922 | $2,499 | premium | 9.0% | — |
| 20 | PRIVIA MEDICAL GROUP, LLC | ARLINGTON | VA | NURSE PRACTITIONER | 1477 | 77 | $153,494 | $1,993 | premium | 18.8% | — |
| 21 | VALLEY UROGYNECOLOGY ASSOCIATES LTD | PHOENIX | AZ | OBSTETRICS/GYNECOLOGY | 4 | 74 | $133,200 | $1,800 | premium | 12.8% | (602) 788-1521 |
| 22 | TEXAS HEALTH CARE PLLC | FORT WORTH | TX | NURSE PRACTITIONER | 364 | 73 | $245,457 | $3,362 | premium | 5.3% | (817) 920-0484 |
| 23 | SEVEN HILLS OB-GYN ASSOCIATES LLC | INDIANAPOLIS | IN | OBSTETRICS/GYNECOLOGY | 92 | 70 | $190,013 | $2,714 | premium | 19.2% | (317) 865-3600 |
| 24 | SCOTT AND WHITE CLINIC | TEMPLE | TX | PHYSICIAN ASSISTANT | 2435 | 69 | $143,658 | $2,082 | premium | 5.0% | (254) 724-2663 |
| 25 | PROVIDENCE HEALTH AND SERVICES OREGON | MEDFORD | OR | PHYSICIAN ASSISTANT | 164 | 68 | $101,319 | $1,490 | premium | 28.5% | — |
| 26 | STAMFORD HEALTH MEDICAL GROUP INC | STAMFORD | CT | PHYSICIAN ASSISTANT | 419 | 67 | $182,240 | $2,720 | premium | 44.7% | (203) 276-4644 |
| 27 | UROLOGIC SPECIALISTS OF OKLAHOMA INC | TULSA | OK | UROLOGY | 44 | 66 | $137,965 | $2,090 | premium | 35.9% | (918) 749-8765 |
| 28 | SAINT LUKES PHYSICIAN GROUP INC | KANSAS CITY | MO | NURSE PRACTITIONER | 1228 | 65 | $118,300 | $1,820 | premium | 25.9% | — |
| 29 | GEORGETOWN PHYSICIAN ASSOCIATES, LLC | MURRELLS INLET | SC | FAMILY PRACTICE | 230 | 65 | $81,070 | $1,247 | premium | 17.5% | (843) 652-8450 |
| 30 | SOUTHERN SHORES UROGYNECOLOGY AND PELVIC RECONSTRUCTIVE SURGERY PC | MYRTLE BEACH | SC | NURSE PRACTITIONER | 2 | 64 | $136,896 | $2,139 | premium | 17.2% | (843) 895-2120 |
| 31 | IHC HEALTH SERVICES INC | MURRAY | UT | PHYSICIAN ASSISTANT | 3944 | 60 | $89,953 | $1,499 | premium | 70.6% | (801) 261-8346 |
| 32 | JOSEPH GAUTA MD PA | NAPLES | FL | OBSTETRICS/GYNECOLOGY | 4 | 58 | $290,000 | $5,000 | premium | 3.7% | (239) 449-7979 |
| 33 | PREMIER HEALTH SPECIALISTS INC | DAYTON | OH | PHYSICIAN ASSISTANT | 574 | 58 | $173,710 | $2,995 | premium | 13.6% | — |
| 34 | SOUTHEASTERN UROGYNECOLOGY AND PELVIC SURGERY LLC | MOULTRIE | GA | NURSE PRACTITIONER | 3 | 58 | $131,254 | $2,263 | premium | 14.7% | (229) 502-1020 |
| 35 | HOLY CROSS HOSPITAL INC | FT LAUDERDALE | FL | PHYSICIAN ASSISTANT | 303 | 58 | $158,764 | $2,737 | premium | 3.7% | (954) 772-2136 |
| 36 | SUBURBAN GYNECOLOGY LLC | PLAINFIELD | IL | NURSE PRACTITIONER | 5 | 57 | $132,810 | $2,330 | premium | 6.6% | (815) 717-8727 |
| 37 | GREATER BALTIMORE MEDICAL CENTER INC | BALTIMORE | MD | HOSPITALIST | 348 | 55 | $86,625 | $1,575 | premium | 14.8% | — |
| 38 | SVMHS CLINICS | SALINAS | CA | PHYSICIAN ASSISTANT | 245 | 54 | $73,465 | $1,360 | premium | 3.7% | (831) 422-3636 |
| 39 | BILLINGS CLINIC | BILLINGS | MT | PHYSICIAN ASSISTANT | 811 | 53 | $160,454 | $3,027 | premium | 77.9% | (406) 657-4000 |
| 40 | INOVA HEALTH CARE SERVICES | FALLS CHURCH | VA | NURSE PRACTITIONER | 1818 | 53 | $111,883 | $2,111 | premium | 13.0% | — |
| 41 | FLORIDA PRACTITIONERS, LLC | FORT LAUDERDALE | FL | PHYSICIAN ASSISTANT | 57 | 53 | $131,983 | $2,490 | premium | 3.4% | (954) 229-8635 |
| 42 | PORTERCARE ADVENTIST HEALTH SYSTEM | DENVER | CO | PHYSICIAN ASSISTANT | 748 | 53 | $94,858 | $1,790 | premium | 27.6% | (303) 778-5797 |
| 43 | VALLEY PHYSICIAN SERVICES PC | HOBOKEN | NJ | NURSE PRACTITIONER | 606 | 52 | $139,360 | $2,680 | premium | 10.4% | (800) 825-5391 |
| 44 | CLINICAL HEALTH CARE ASSOCIATES OF NEW JERSEY PC | CHERRY HILL | NJ | DIAGNOSTIC RADIOLOGY | 825 | 52 | $83,196 | $1,600 | premium | 10.4% | (856) 433-2535 |
| 45 | UROLOGY OF ST LOUIS INC | SAINT LOUIS | MO | UROLOGY | 112 | 51 | $113,258 | $2,221 | premium | 20.3% | (314) 567-6071 |
| 46 | UNIVERSITY OF PENN - MEDICAL GROUP | PHILADELPHIA | PA | PHYSICIAN ASSISTANT | 3505 | 50 | $161,105 | $3,222 | premium | 8.3% | (215) 662-2777 |
| 47 | BAYHEALTH MEDICAL CENTER, INC | DOVER | DE | NURSE PRACTITIONER | 394 | 49 | $44,415 | $906 | premium | 52.7% | (302) 744-4700 |
| 48 | UROGYNECOLOGY OF SAN ANTONIO PLLC | BOERNE | TX | OBSTETRICS/GYNECOLOGY | 2 | 49 | $68,773 | $1,404 | premium | 3.5% | (830) 355-2343 |
| 49 | ARIZONA DIGESTIVE HEALTH PC | GLENDALE | AZ | GASTROENTEROLOGY | 132 | 48 | $69,360 | $1,445 | premium | 8.3% | (602) 843-1265 |
| 50 | YALE UNIVERSITY | NEW HAVEN | CT | PHYSICIAN ASSISTANT | 2649 | 46 | $198,198 | $4,309 | premium | 30.7% | (203) 688-4242 |
| 51 | PRACTICE ASSOCIATES MEDICAL GROUP | MORRISTOWN | NJ | NURSE PRACTITIONER | 1404 | 46 | $120,520 | $2,620 | premium | 9.2% | (973) 971-5596 |
| 52 | NORTHWESTERN MEDICAL FACULTY FOUNDATION | CHICAGO | IL | NURSE PRACTITIONER | 4339 | 46 | $191,084 | $4,154 | premium | 5.3% | — |
| 53 | CHRISTUS TRINITY CLINIC | TYLER | TX | NURSE PRACTITIONER | 1495 | 46 | $116,426 | $2,531 | premium | 3.3% | (903) 606-5560 |
| 54 | WELLSTAR MEDICAL GROUP LLC | MARIETTA | GA | NURSE PRACTITIONER | 3060 | 45 | $110,625 | $2,458 | premium | 11.4% | (770) 422-2004 |
| 55 | PELVIC MEDICINE AND RECONSTRUCTIVE SURGERY LLC | SCOTTSDALE | AZ | OBSTETRICS/GYNECOLOGY | 2 | 45 | $36,451 | $810 | premium | 7.8% | (480) 656-0207 |
| 56 | GOOD SAMARITAN HOSPITAL CORVALLIS | CORVALLIS | OR | PHYSICIAN ASSISTANT | 388 | 45 | $136,032 | $3,023 | premium | 18.8% | (541) 768-7700 |
| 57 | CHRISTIANA CARE HEALTH SERVICES INC | NEWARK | DE | PHYSICIAN ASSISTANT | 1537 | 44 | $86,826 | $1,973 | premium | 47.3% | — |
| 58 | OHIOHEALTH CORPORATION | COLUMBUS | OH | PHYSICIAN ASSISTANT | 2282 | 43 | $91,640 | $2,131 | premium | 10.1% | — |
| 59 | LEHIGH VALLEY PHYSICIAN GROUP | ALLENTOWN | PA | PHYSICIAN ASSISTANT | 2389 | 43 | $110,601 | $2,572 | premium | 7.2% | — |
| 60 | LEXINGTON HEALTH INC | WEST COLUMBIA | SC | NURSE PRACTITIONER | 909 | 43 | $126,463 | $2,941 | premium | 11.6% | (803) 744-4900 |
| 61 | NEW YORK UNIVERSITY | NEW YORK | NY | DIAGNOSTIC RADIOLOGY | 5704 | 43 | $376,895 | $8,765 | premium | 7.6% | (212) 263-9700 |
| 62 | PROVIDENCE HEALTH AND SERVICES WASHINGTON | SPOKANE | WA | PHYSICIAN ASSISTANT | 771 | 43 | $98,384 | $2,288 | premium | 31.6% | — |
| 63 | UROLOGY SPECIALISTS CHARTERED | SIOUX FALLS | SD | DIAGNOSTIC RADIOLOGY | 45 | 42 | $103,808 | $2,472 | premium | 39.6% | (605) 336-0635 |
| 64 | UNIVERSITY OF MARYLAND COMMUNITY MEDICAL GROUP INC | GLEN BURNIE | MD | NURSE PRACTITIONER | 458 | 42 | $99,203 | $2,362 | premium | 11.3% | (410) 761-1222 |
| 65 | UNIVERSITY OF ALABAMA HEALTH SERVICES FOUNDATION, PC | BIRMINGHAM | AL | NURSE PRACTITIONER | 2788 | 42 | $130,536 | $3,108 | premium | 17.6% | (205) 934-3460 |
| 66 | ADVANCED GYNECOLOGY PC | WATKINSVILLE | GA | OBSTETRICS/GYNECOLOGY | 13 | 41 | $112,184 | $2,736 | premium | 10.4% | (678) 344-8900 |
| 67 | PACIFIC CENTRAL COAST HEALTH CENTERS | SANTA MARIA | CA | PHYSICIAN ASSISTANT | 249 | 40 | $60,048 | $1,501 | premium | 2.8% | (805) 349-8514 |
| 68 | VITALMD GROUP HOLDING LLC | MIAMI | FL | OBSTETRICS/GYNECOLOGY | 531 | 40 | $73,338 | $1,833 | premium | 2.6% | (305) 273-4641 |
| 69 | BERT E GEER DO PC | COOKEVILLE | TN | NURSE PRACTITIONER | 6 | 40 | $52,720 | $1,318 | premium | 9.9% | (931) 528-9047 |
| 70 | LUMINIS HEALTH MEDICAL GROUP, LLC | ANNAPOLIS | MD | PHYSICIAN ASSISTANT | 544 | 40 | $54,920 | $1,373 | premium | 10.8% | (443) 481-1000 |
| 71 | SUMMIT MEDICAL GROUP INC | EDGEWOOD | KY | NURSE PRACTITIONER | 806 | 40 | $71,040 | $1,776 | premium | 35.4% | (859) 578-5880 |
| 72 | HACKENSACK MERIDIAN HEALTH MEDICAL GROUP - SPECIALTY CARE PC | NEPTUNE | PA | NURSE PRACTITIONER | 1878 | 39 | $75,582 | $1,938 | premium | 6.5% | (732) 362-3663 |
| 73 | BOCACARE INC | BOCA RATON | FL | PHYSICIAN ASSISTANT | 199 | 39 | $121,714 | $3,121 | premium | 2.5% | (561) 955-7100 |
| 74 | REGIONAL WOMENS HEALTH GROUP LLC | VOORHEES | IL | OBSTETRICS/GYNECOLOGY | 352 | 39 | $211,770 | $5,430 | premium | 4.5% | (856) 424-3323 |
| 75 | SUMMA PHYSICIANS LLC | AKRON | OH | NURSE PRACTITIONER | 677 | 39 | $57,876 | $1,484 | premium | 9.1% | — |
| 76 | AUSTIN UROGYNECOLOGY, PLLC | AUSTIN | TX | NURSE PRACTITIONER | 3 | 38 | $49,350 | $1,299 | premium | 2.7% | (512) 973-8276 |
| 77 | COMMUNITY MEDICAL ASSOCIATES INC | LOUISVILLE | KY | NURSE PRACTITIONER | 1377 | 38 | $47,434 | $1,248 | premium | 33.6% | (502) 937-2209 |
| 78 | MODOCUROGYN, PLLC | MESA | AZ | NURSE PRACTITIONER | 2 | 38 | $57,722 | $1,519 | premium | 6.6% | (480) 889-2654 |
| 79 | VALLEY PHYSICIAN SERVICES PC | HOBOKEN | NY | NURSE PRACTITIONER | 606 | 38 | $14,060 | $370 | premium | 6.7% | (800) 825-5391 |
| 80 | FEMALE PELVIC MEDICINE INSTITUTE OF VIRGINIA PC | MIDLOTHIAN | VA | NURSE PRACTITIONER | 2 | 37 | $39,967 | $1,080 | premium | 9.0% | (804) 523-2533 |
| 81 | SUMMIT MEDICAL GROUP PA | BERKELEY HEIGHTS | NJ | PHYSICIAN ASSISTANT | 1183 | 37 | $191,216 | $5,168 | premium | 7.4% | (908) 273-4300 |
| 82 | BON SECOURS MEDICAL GROUP GREENVILLE SPECIALTY CARE LLC | GREENVILLE | SC | NURSE PRACTITIONER | 288 | 37 | $58,201 | $1,573 | premium | 9.9% | (864) 255-1901 |
| 83 | UROGYNECOLOGY OF OKLAHOMA, PLLC | OKLAHOMA CITY | OK | PHYSICIAN ASSISTANT | 4 | 36 | $54,650 | $1,518 | premium | 19.6% | (405) 400-8188 |
| 84 | GUTHRIE MEDICAL GROUP PC | SAYRE | MA | PHYSICIAN ASSISTANT | 804 | 36 | $116,466 | $3,235 | premium | 8.7% | (570) 888-5858 |
| 85 | WAKEMED SPECIALISTS GROUP LLC | RALEIGH | NC | PHYSICIAN ASSISTANT | 860 | 36 | $93,708 | $2,603 | premium | 12.0% | (919) 350-7270 |
| 86 | WOMENS HEALTHCARE ASSOCIATES LLC | PORTLAND | OR | OBSTETRICS/GYNECOLOGY | 105 | 35 | $50,531 | $1,444 | premium | 14.6% | (503) 734-3700 |
| 87 | LAKELAND REGIONAL HEALTH SYSTEMS INC | LAKELAND | FL | PHYSICIAN ASSISTANT | 493 | 35 | $65,275 | $1,865 | premium | 2.3% | (863) 603-6565 |
| 88 | ELIZABETH A. HUTSON M.D. LTD | SPARKS | NV | NURSE PRACTITIONER | 9 | 35 | $91,000 | $2,600 | premium | 24.1% | (775) 432-1343 |
| 89 | ADVOCATE HEALTH AND HOSPITALS CORPORATION | BUFFALO GROVE | IL | NURSE PRACTITIONER | 3045 | 35 | $85,290 | $2,437 | premium | 4.1% | (847) 459-1160 |
| 90 | THE OREGON CLINIC, PC | PORTLAND | OR | PHYSICIAN ASSISTANT | 347 | 35 | $58,473 | $1,671 | premium | 14.6% | (503) 239-6673 |
| 91 | ADVANCED UROLOGY INSTITUTE LLC | INVERNESS | FL | UROLOGY | 147 | 35 | $66,724 | $1,906 | premium | 2.3% | (352) 726-9707 |
| 92 | IU HEALTH MEDICAL GROUP, LLC | INDIANAPOLIS | IN | NURSE PRACTITIONER | 4250 | 34 | $55,352 | $1,628 | premium | 9.3% | (888) 484-3258 |
| 93 | NORTH SHORE MEDICAL GROUP OF THE MOUNT SINAI SCHOOL OF MEDICINE | GREENLAWN | NY | DIAGNOSTIC RADIOLOGY | 315 | 34 | $98,940 | $2,910 | premium | 6.0% | (631) 628-5000 |
| 94 | PREMIER MEDICAL GROUP OF THE HUDSON VALLEY PC | POUGHKEEPSIE | NY | NURSE PRACTITIONER | 131 | 34 | $67,864 | $1,996 | premium | 6.0% | — |
| 95 | COMMUNITY CARE SERVICES LLC | RENO | NV | NURSE PRACTITIONER | 601 | 34 | $49,605 | $1,459 | premium | 23.4% | — |
| 96 | UROLOGY CENTERS OF ALABAMA, PC | HOMEWOOD | AL | UROLOGY | 61 | 34 | $57,000 | $1,676 | premium | 14.3% | (205) 930-0920 |
| 97 | SCRIPPS HEALTH | LA JOLLA | CA | PHYSICIAN ASSISTANT | 1431 | 33 | $61,152 | $1,853 | premium | 2.3% | (858) 455-9100 |
| 98 | FLORIDA HOSPITAL HEALTHCARE PARTNERS, INC | DAYTONA BEACH | FL | PHYSICIAN ASSISTANT | 588 | 33 | $75,702 | $2,294 | premium | 2.1% | (386) 231-6000 |
| 99 | GREAT LAKES PHYSICIAN PC | CHEEKTOWAGA | NY | PHYSICIAN ASSISTANT | 69 | 32 | $57,920 | $1,810 | premium | 5.6% | (716) 844-5000 |
| 100 | UROLOGY AUSTIN PLLC | AUSTIN | TX | PHYSICIAN ASSISTANT | 57 | 32 | $53,056 | $1,658 | premium | 2.3% | (512) 788-9688 |
Showing the top 100 of 284 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 →