90960 — Dialysis services, 4 or more physician visits per month (20 years or older)
782,857 observed fee-for-service (49%) · ~807,281 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.
Chronic kidney disease prevalence:
0.8–5.0% of adults
across 54 reporting states
(CDC BRFSS 2023–2024, age-adjusted state estimates).
Highest:
GU 5.0% · KY 4.6% · WV 4.6% · LA 4.4% · SC 4.4%
CDC-published US estimate: 3.9% (BRFSS 2024, crude prevalence — not age-adjusted, so not directly comparable to the state figures above).
CDC BRFSS prevalence is survey data covering all-payer adults 18 and older; Nevvi utilization counts Medicare fee-for-service only, largely 65 and older. The two appear side by side as context — Nevvi never combines them into a score, rating, or ranking. See Methods.
- 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 | 90960 svcs | Submitted charges | Avg charge | Medicare $ locked column | Share* | Phone |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | FLORIDA KIDNEY PHYSICIANS LLC | TAMPA | FL | NEPHROLOGY | 165 | 11,469 | $7,908,544 | $690 | premium | 16.8% | (813) 910-8708 |
| 2 | DALLAS NEPHROLOGY ASSOCIATES | DALLAS | TX | NEPHROLOGY | 154 | 9,480 | $8,053,828 | $850 | premium | 9.0% | (214) 358-2300 |
| 3 | MID-ATLANTIC NEPHROLOGY ASSOCIATES PA | OWINGS MILLS | MD | NEPHROLOGY | 57 | 8,912 | $8,288,741 | $930 | premium | 23.9% | (410) 602-7792 |
| 4 | NEPHROLOGY ASSOCIATES OF NORTHERN ILLINOIS LTD | ELK GROVE VILLAGE | IL | NEPHROLOGY | 115 | 7,749 | $5,799,759 | $748 | premium | 16.0% | (847) 981-3680 |
| 5 | NEPHROLOGY ASSOCIATES MEDICAL GROUP INC | RIVERSIDE | CA | NEPHROLOGY | 63 | 7,491 | $6,666,990 | $890 | premium | 4.9% | (951) 687-2800 |
| 6 | WEST COAST KIDNEY | WALNUT CREEK | CA | NEPHROLOGY | 55 | 7,248 | $5,881,322 | $811 | premium | 4.7% | (925) 944-0351 |
| 7 | THE NEPHROLOGY GROUP INC | FRESNO | CA | NEPHROLOGY | 51 | 6,347 | $6,860,730 | $1,081 | premium | 4.1% | (559) 228-9660 |
| 8 | RENAL ASSOCIATES, P.A. | SAN ANTONIO | TX | NEPHROLOGY | 39 | 6,295 | $4,091,046 | $650 | premium | 6.0% | (210) 403-7978 |
| 9 | NORTHEAST KIDNEY CARE LLC | FLORHAM PARK | NJ | NEPHROLOGY | 66 | 6,251 | $5,351,803 | $856 | premium | 15.9% | (973) 736-2212 |
| 10 | BALBOA NEPHROLOGY MEDICAL GROUP INC | SAN DIEGO | CA | NEPHROLOGY | 80 | 5,943 | $4,338,390 | $730 | premium | 3.9% | (619) 582-4490 |
| 11 | METROLINA NEPHROLOGY ASSOCIATES PA | CHARLOTTE | NC | NEPHROLOGY | 87 | 5,247 | $5,430,645 | $1,035 | premium | 13.5% | (704) 731-6451 |
| 12 | AKDHC LLC | PHOENIX | AZ | NEPHROLOGY | 129 | 5,184 | $3,642,404 | $703 | premium | 29.7% | (602) 200-8288 |
| 13 | SOUTHWEST KIDNEY INSTITUTE PLC | PHOENIX | AZ | NEPHROLOGY | 97 | 4,883 | $3,392,575 | $695 | premium | 28.0% | (623) 247-9235 |
| 14 | NATIONAL KIDNEY PARTNERS LLP | HUDSON | FL | NEPHROLOGY | 61 | 4,810 | $3,424,263 | $712 | premium | 7.0% | (727) 863-5418 |
| 15 | ASSOCIATES IN NEPHROLOGY SC | CHICAGO | IL | NEPHROLOGY | 52 | 4,581 | $4,140,879 | $904 | premium | 9.5% | (312) 654-2721 |
| 16 | NEPHROLOGY ASSOCIATES, PC | COLUMBIA | TN | NEPHROLOGY | 40 | 4,556 | $4,328,200 | $950 | premium | 21.9% | (931) 388-3209 |
| 17 | EASTERN NEPHROLOGY ASSOCIATES PLLC | GREENVILLE | NC | NEPHROLOGY | 77 | 4,458 | $2,376,435 | $533 | premium | 11.4% | (252) 752-8880 |
| 18 | NORTH CAROLINA NEPHROLOGY PA | RALEIGH | NC | NEPHROLOGY | 58 | 4,448 | $2,802,030 | $630 | premium | 11.4% | (919) 231-3966 |
| 19 | KIDNEY CARE SPECIALISTS LLC | ALLENTOWN | PA | NEPHROLOGY | 75 | 4,108 | $2,423,720 | $590 | premium | 10.3% | (610) 432-4529 |
| 20 | WASHINGTON NEPHROLOGY ASSOCIATES LLP | ALEXANDRIA | MD | NEPHROLOGY | 30 | 4,080 | $3,697,908 | $906 | premium | 11.0% | (703) 461-3556 |
| 21 | NEPHROLOGY ASSOCIATES PA | NEWARK | DE | NEPHROLOGY | 53 | 4,046 | $2,670,360 | $660 | premium | 65.4% | (302) 225-0451 |
| 22 | NEPHROLOGY ASSOCIATES OF NORTHERN INDIANA PC | FORT WAYNE | IN | NEPHROLOGY | 68 | 3,921 | $2,649,386 | $676 | premium | 20.5% | (260) 494-3484 |
| 23 | NKDHC RUDNITSKY PLLC | LAS VEGAS | NV | NEPHROLOGY | 45 | 3,711 | $3,205,074 | $864 | premium | 29.9% | (702) 732-2438 |
| 24 | EAST BAY NEPHROLOGY MEDICAL GROUP INC | BERKELEY | CA | NEPHROLOGY | 31 | 3,696 | $3,000,791 | $812 | premium | 2.4% | (510) 841-0411 |
| 25 | NEPHROLOGY AND ENDOCRINE ASSOCIATES INC | LAS VEGAS | NV | NEPHROLOGY | 63 | 3,328 | $3,612,013 | $1,085 | premium | 26.8% | (702) 877-1887 |
| 26 | SOUTHERN CALIFORNIA KIDNEY CONSULTANTS INC | GARDEN GROVE | CA | NEPHROLOGY | 21 | 3,322 | $1,548,052 | $466 | premium | 2.2% | (714) 636-2890 |
| 27 | NEPHROLOGY ASSOCIATES OF KENTUCKIANA PSC | LOUISVILLE | KY | NEPHROLOGY | 38 | 3,313 | $1,809,960 | $546 | premium | 26.7% | (502) 587-9660 |
| 28 | NEPHROLOGY ASSOCIATES OF CENTRAL FLORIDA, P.A. | ORLANDO | FL | NEPHROLOGY | 34 | 3,278 | $3,933,000 | $1,200 | premium | 4.8% | (407) 894-4693 |
| 29 | KIDNEY DISEASE MEDICAL GROUP INC | GLENDALE | CA | NEPHROLOGY | 8 | 3,090 | $2,121,216 | $686 | premium | 2.0% | (818) 500-4055 |
| 30 | NEPHROLOGY AND HYPERTENSION ASSOCIATES LTD | TUPELO | MS | NEPHROLOGY | 19 | 2,961 | $3,020,220 | $1,020 | premium | 15.5% | (662) 844-4711 |
| 31 | MICHIGAN KIDNEY CONSULTANTS PC | TROY | MI | NEPHROLOGY | 45 | 2,947 | $3,344,400 | $1,135 | premium | 9.2% | (248) 267-5010 |
| 32 | NORTH SHORE-LIJ MEDICAL PC | MANHASSET | NY | PHYSICIAN ASSISTANT | 6294 | 2,908 | $4,744,803 | $1,632 | premium | 4.0% | — |
| 33 | RENAL SPECIALISTS OF HOUSTON, PA | HOUSTON | TX | NEPHROLOGY | 24 | 2,901 | $2,068,545 | $713 | premium | 2.8% | — |
| 34 | PRINE HEALTH MEDICAL GROUP, PLLC | MANHASSET | NY | NEPHROLOGY | 75 | 2,899 | $3,065,375 | $1,057 | premium | 4.0% | (516) 407-2727 |
| 35 | CENTRAL NEPHROLOGY CLINIC PLLC | FLOWOOD | MS | NEPHROLOGY | 16 | 2,889 | $2,618,445 | $906 | premium | 15.1% | (601) 981-1610 |
| 36 | AUSTIN KIDNEY ASSOCIATES PA | AUSTIN | TX | NEPHROLOGY | 32 | 2,864 | $5,155,200 | $1,800 | premium | 2.7% | (512) 320-1500 |
| 37 | TIDEWATER KIDNEY SPECIALISTS INC | NORFOLK | VA | NEPHROLOGY | 21 | 2,843 | $2,482,735 | $873 | premium | 9.7% | (757) 623-0005 |
| 38 | CLINICAL RENAL ASSOCIATES LLC | CHESTER | PA | NEPHROLOGY | 33 | 2,785 | $2,010,822 | $722 | premium | 7.0% | (610) 872-8501 |
| 39 | COLUMBIA NEPHROLOGY ASSOCIATES PA | COLUMBIA | SC | NEPHROLOGY | 33 | 2,762 | $2,389,130 | $865 | premium | 11.9% | 80325299071124 |
| 40 | SAN ANTONIO KIDNEY DISEASE CENTER PHYSICIANS GROUP, P.L.L.C. | SAN ANTONIO | TX | NEPHROLOGY | 35 | 2,701 | $2,740,713 | $1,015 | premium | 2.6% | (210) 549-3524 |
| 41 | HAWAII KIDNEY SPECIALISTS LLP | HONOLULU | HI | NEPHROLOGY | 27 | 2,661 | $2,411,797 | $906 | premium | 32.5% | (808) 523-0445 |
| 42 | YIUM, SHENOUDA AND MILLER PTRSHP | CHATTANOOGA | TN | NEPHROLOGY | 49 | 2,655 | $5,201,413 | $1,959 | premium | 12.7% | (423) 698-0927 |
| 43 | INDIANA NEPHROLOGY AND INTERNAL MEDICINE PC | INDIANAPOLIS | IN | NEPHROLOGY | 34 | 2,643 | $1,453,350 | $550 | premium | 13.8% | (317) 574-4747 |
| 44 | HATTIESBURG CLINIC PA | HATTIESBURG | MS | FAMILY PRACTICE | 530 | 2,579 | $2,455,208 | $952 | premium | 13.5% | (601) 264-6000 |
| 45 | CAROLINA KIDNEY CARE PA | FAYETTEVILLE | NC | NURSE PRACTITIONER | 24 | 2,558 | $1,568,054 | $613 | premium | 6.6% | (910) 484-8114 |
| 46 | KERN NEPHROLOGY MEDICAL GROUP | BAKERSFIELD | CA | NEPHROLOGY | 6 | 2,552 | $1,531,138 | $600 | premium | 1.7% | (661) 324-4721 |
| 47 | NORTHWEST RENAL CLINIC INC | PORTLAND | OR | NEPHROLOGY | 41 | 2,496 | $2,267,903 | $909 | premium | 31.8% | (503) 292-7704 |
| 48 | CENTRAL FLORIDA KIDNEY SPECIALISTS INC | ORLANDO | FL | NEPHROLOGY | 38 | 2,493 | $2,990,480 | $1,200 | premium | 3.7% | (407) 816-5700 |
| 49 | PARAGON HEALTH PC | KALAMAZOO | MI | NEPHROLOGY | 51 | 2,452 | $2,205,001 | $899 | premium | 7.6% | (269) 382-3012 |
| 50 | PROHEALTH PARTNERS, A MEDICAL GROUP | LONG BEACH | CA | INTERNAL MEDICINE | 228 | 2,441 | $1,862,620 | $763 | premium | 1.6% | (562) 495-4952 |
| 51 | ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI | NEW YORK | NY | PHYSICIAN ASSISTANT | 2818 | 2,430 | $2,721,600 | $1,120 | premium | 3.3% | (212) 241-4812 |
| 52 | PENSACOLA NEPHROLOGY PA | PENSACOLA | FL | NEPHROLOGY | 37 | 2,420 | $1,353,432 | $559 | premium | 3.5% | (850) 444-4700 |
| 53 | WICHITA NEPHROLOGY GROUP PA | WICHITA | KS | NEPHROLOGY | 12 | 2,332 | $2,309,100 | $990 | premium | 31.3% | (316) 268-5000 |
| 54 | PACIFIC MED AND NEPHROLOGY | SINAJANA | HI | NEPHROLOGY | 13 | 2,179 | $781,912 | $359 | premium | 26.6% | 6716497232201 |
| 55 | DIALYSIS ASSOCIATES | FORT WORTH | TX | NEPHROLOGY | 27 | 2,147 | $1,945,933 | $906 | premium | 2.0% | (817) 336-5060 |
| 56 | NEPHROLOGY AND INTERNAL MEDICINE PC | FLINT | MI | NEPHROLOGY | 9 | 2,141 | $1,498,700 | $700 | premium | 6.7% | (810) 238-4172 |
| 57 | ONEILL CLARK NARVARTE AND VICKS A PROFESSIONAL CORPORATION | RENO | NV | NEPHROLOGY | 21 | 2,122 | $1,488,155 | $701 | premium | 17.1% | (775) 322-4550 |
| 58 | DENVER NEPHROLOGISTS PC | DENVER | CO | NEPHROLOGY | 43 | 2,120 | $1,846,520 | $871 | premium | 25.9% | (303) 991-0993 |
| 59 | INTERNAL MEDICINE AND NEPHROLOGY MED. GROUP INC. | TORRANCE | CA | NEPHROLOGY | 8 | 2,043 | $1,225,700 | $600 | premium | 1.3% | (310) 325-4517 |
| 60 | CENTRAL VALLEY GENERAL HOSPITAL | HANFORD | CA | FAMILY PRACTICE | 92 | 2,023 | $881,584 | $436 | premium | 1.3% | — |
| 61 | NEPHROLOGY ASSOCIATES OF UPLAND AND POMONA | POMONA | CA | NEPHROLOGY | 6 | 2,012 | $1,800,740 | $895 | premium | 1.3% | (909) 981-5882 |
| 62 | GEORGIA NEPHROLOGY, LLC | LAWRENCEVILLE | GA | NEPHROLOGY | 32 | 2,009 | $1,814,127 | $903 | premium | 5.0% | (404) 645-7150 |
| 63 | NEPHROLOGY ASSOCIATES | SANTA ROSA | CA | NEPHROLOGY | 7 | 1,985 | $1,053,099 | $531 | premium | 1.3% | (707) 526-2027 |
| 64 | M REZA MIZANI MD PA | SAN ANTONIO | TX | NEPHROLOGY | 29 | 1,972 | $2,078,488 | $1,054 | premium | 1.9% | (210) 265-8155 |
| 65 | NEPHROLOGY ASSOCIATES OF UTAH LLC | S SALT LAKE | UT | NEPHROLOGY | 28 | 1,969 | $1,714,005 | $870 | premium | 40.5% | (801) 288-2634 |
| 66 | NEPHROLOGY ASSOCIATES OF NORTHERN VIRGINIA INC | FAIRFAX | VA | NEPHROLOGY | 15 | 1,966 | $983,393 | $500 | premium | 6.7% | (703) 476-1740 |
| 67 | RENAL CONSULTANTS MEDICAL GROUP | NEWHALL | CA | NEPHROLOGY | 8 | 1,953 | $1,335,713 | $684 | premium | 1.3% | (661) 254-0193 |
| 68 | NEPHROLOGY ASSOCIATES OF TIDEWATER LTD | NORFOLK | VA | NEPHROLOGY | 25 | 1,950 | $975,000 | $500 | premium | 6.6% | (757) 466-9288 |
| 69 | NEPHROLOGY ASSOCIATES OF MOBILE, P.A. | MOBILE | AL | NEPHROLOGY | 40 | 1,944 | $1,549,368 | $797 | premium | 12.3% | (251) 343-5004 |
| 70 | RNA OF ROCKFORD, PLLC | ROCKFORD | IL | NEPHROLOGY | 18 | 1,929 | $1,315,914 | $682 | premium | 4.0% | (815) 227-8300 |
| 71 | CHARLESTON NEPHROLOGY ASSOCIATES, LLC | NORTH CHARLESTON | SC | NEPHROLOGY | 17 | 1,907 | $1,552,298 | $814 | premium | 8.2% | (843) 767-9260 |
| 72 | NEPHROLOGY ASSOCIATES OF MICHIGAN PC | YPSILANTI | MI | NURSE PRACTITIONER | 21 | 1,903 | $1,495,800 | $786 | premium | 5.9% | (734) 715-1706 |
| 73 | CALIFORNIA KIDNEY SPECIALISTS | SAN DIMAS | CA | NEPHROLOGY | 17 | 1,891 | $1,323,700 | $700 | premium | 1.2% | 90954227772770 |
| 74 | RENALCARE ASSOCIATES, S.C. | PEORIA | IL | NEPHROLOGY | 48 | 1,882 | $1,126,100 | $598 | premium | 3.9% | (309) 676-8123 |
| 75 | CAROLINA NEPHROLOGY PA | GREENVILLE | SC | NURSE PRACTITIONER | 37 | 1,870 | $1,232,045 | $659 | premium | 8.0% | — |
| 76 | KIDNEY CARE CENTERS | JACKSON | NJ | NEPHROLOGY | 24 | 1,856 | $1,200,743 | $647 | premium | 4.7% | (732) 460-1200 |
| 77 | ARKANSAS RENAL GROUP PA | HOT SPRINGS | AR | NEPHROLOGY | 16 | 1,854 | $1,390,500 | $750 | premium | 20.2% | (501) 624-6000 |
| 78 | HENRY FORD HEALTH SYSTEM | DETROIT | MI | PHYSICIAN ASSISTANT | 2536 | 1,849 | $2,146,815 | $1,161 | premium | 5.8% | (313) 916-2600 |
| 79 | ST CLAIR SPECIALTY PHYSICIANS PC | ROSEVILLE | MI | NEPHROLOGY | 35 | 1,825 | $1,092,600 | $599 | premium | 5.7% | (586) 871-3686 |
| 80 | NEPHROLOGY ASSOCIATES INC | EAST PROVIDENCE | RI | NEPHROLOGY | 9 | 1,780 | $1,265,500 | $711 | premium | 48.2% | (401) 438-5950 |
| 81 | RICHMOND NEPHROLOGY ASSOCIATES INC | RICHMOND | VA | PHYSICIAN ASSISTANT | 24 | 1,761 | $1,437,744 | $816 | premium | 6.0% | (804) 323-6903 |
| 82 | CAPITAL AREA RENAL ASSOCIATES, PC | WASHINGTON | DC | NEPHROLOGY | 8 | 1,753 | $1,051,800 | $600 | premium | 33.2% | (202) 877-0698 |
| 83 | JAMES D BAKER III MD PA | JACKSONVILLE | FL | NEPHROLOGY | 19 | 1,747 | $1,008,019 | $577 | premium | 2.6% | (904) 389-5333 |
| 84 | NEW YORK NEPHROLOGY AND DIALYSIS ACCESS SURGERY, P.C. | ALBANY | NY | NEPHROLOGY | 18 | 1,744 | $985,360 | $565 | premium | 2.4% | (518) 434-2244 |
| 85 | RENAL MEDICINE ASSOCIATES LTD. | ALBUQUERQUE | NM | NURSE PRACTITIONER | 36 | 1,738 | $1,683,099 | $968 | premium | 21.1% | (505) 994-7400 |
| 86 | KIDNEY MEDICAL ASSOCIATES PLLC | BRONX | NY | INTERNAL MEDICINE | 11 | 1,696 | $1,102,400 | $650 | premium | 2.3% | (718) 655-4956 |
| 87 | DALLAS RENAL GROUP, P.A. | DALLAS | TX | NEPHROLOGY | 50 | 1,694 | $1,465,147 | $865 | premium | 1.6% | (888) 616-6322 |
| 88 | ISLAND NEPHROLOGY SERVICES PC | STATEN ISLAND | NY | NEPHROLOGY | 13 | 1,679 | $1,010,200 | $602 | premium | 2.3% | (718) 226-2000 |
| 89 | MOUNTAIN KIDNEY AND HYPERTENSION ASSOCIATES PA | ASHEVILLE | NC | NURSE PRACTITIONER | 18 | 1,679 | $1,163,547 | $693 | premium | 4.3% | (828) 258-8545 |
| 90 | NORTH TEXAS KIDNEY DISEASE ASSOCIATES | LEWISVILLE | TX | NEPHROLOGY | 25 | 1,665 | $1,162,637 | $698 | premium | 1.6% | (972) 219-0558 |
| 91 | NORTHWEST LOUISIANA NEPHROLOGY, LLC | SHREVEPORT | LA | NEPHROLOGY | 22 | 1,628 | $589,520 | $362 | premium | 10.2% | (318) 227-8899 |
| 92 | W SCOTT MOORE ET AL PTR | WINSTON SALEM | NC | NEPHROLOGY | 12 | 1,607 | $803,137 | $500 | premium | 4.1% | (336) 768-2425 |
| 93 | SCOTT AND WHITE CLINIC | TEMPLE | TX | PHYSICIAN ASSISTANT | 2435 | 1,590 | $1,510,500 | $950 | premium | 1.5% | (254) 724-2663 |
| 94 | PHYSICIANS CARE OF VIRGINIA PC | ROANOKE | VA | NEPHROLOGY | 20 | 1,586 | $1,397,266 | $881 | premium | 5.4% | (540) 527-2737 |
| 95 | KIDNEY AND HYPERTENSION CENTER INC | CINCINNATI | OH | NEPHROLOGY | 47 | 1,579 | $908,918 | $576 | premium | 6.9% | (513) 241-5630 |
| 96 | NORTHEAST LOUISIANA KIDNEY SPECIALISTS,LLC | MONROE | LA | NEPHROLOGY | 8 | 1,568 | $1,087,918 | $694 | premium | 9.8% | (318) 323-8847 |
| 97 | ADVANCED KIDNEY CARE OF HUDSON VALLEY, PC | NEWBURGH | NY | NEPHROLOGY | 8 | 1,551 | $955,819 | $616 | premium | 2.1% | (845) 454-1399 |
| 98 | VIRTUA MEDICAL GROUP, PA | VOORHEES | NJ | PHYSICIAN ASSISTANT | 1662 | 1,526 | $1,388,660 | $910 | premium | 3.9% | (856) 247-7260 |
| 99 | NEPHROLOGY ASSOCIATES PC | TRUMBULL | CT | NEPHROLOGY | 11 | 1,525 | $1,756,150 | $1,152 | premium | 15.1% | (203) 335-0195 |
| 100 | STARLING PHYSICIANS, PLLC | WETHERSFIELD | CT | NURSE PRACTITIONER | 273 | 1,521 | $1,190,245 | $783 | premium | 15.0% | (860) 832-4666 |
Showing the top 100 of 1,157 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 →