J3475 — Injection, magnesium sulfate, per 500 mg
180,613 observed fee-for-service (50%) · ~182,666 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 | J3475 svcs | Submitted charges | Avg charge | Medicare $ locked column | Share* | Phone |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | TEXAS ONCOLOGY PA | DALLAS | TX | PHYSICIAN ASSISTANT | 995 | 23,942 | $143,652 | $6 | premium | 74.9% | — |
| 2 | ONCOLOGY-HEMATOLOGY ASSOCIATES OF CENTRAL ILLINOIS P C | PEORIA | IL | NURSE PRACTITIONER | 62 | 12,199 | $45,803 | $4 | premium | 46.7% | (309) 243-3000 |
| 3 | FLORIDA CANCER SPECIALISTS AND RESEARCH INSTITUTE, LLC | FORT MYERS | FL | HEMATOLOGY/ONCOLOGY | 437 | 11,800 | $24,124 | $2 | premium | 42.4% | (239) 561-9622 |
| 4 | ONCOLOGY SPECIALTIES, P.C. | HUNTSVILLE | AL | NURSE PRACTITIONER | 93 | 5,762 | $11,524 | $2 | premium | 79.7% | (256) 705-4224 |
| 5 | SOLANO HEMATOLOGY - ONCOLOGY | VALLEJO | CA | HEMATOLOGY/ONCOLOGY | 3 | 5,532 | $16,596 | $3 | premium | 13.1% | (707) 551-3300 |
| 6 | NORTH SHORE HEMATOLOGY ONCOLOGY ASSOCIATES PC | SMITHTOWN | NY | NURSE PRACTITIONER | 462 | 5,196 | $51,719 | $10 | premium | 25.9% | (631) 751-3000 |
| 7 | TENNESSEE CANCER SPECIALISTS PLLC | KNOXVILLE | TN | NURSE PRACTITIONER | 65 | 4,216 | $14,896 | $4 | premium | 61.2% | (865) 934-5800 |
| 8 | HIGHLANDS ONCOLOGY GROUP PA | FAYETTEVILLE | AR | NURSE PRACTITIONER | 79 | 3,956 | $19,780 | $5 | premium | 44.0% | (479) 361-2585 |
| 9 | CENTRAL ARKANSAS RADIATION THERAPY INSTITUTE INC | LITTLE ROCK | AR | HEMATOLOGY/ONCOLOGY | 90 | 3,746 | $11,238 | $3 | premium | 41.6% | — |
| 10 | CANCER CARE SPECIALISTS OF CENTRAL ILLINOIS SC | DECATUR | IL | HEMATOLOGY/ONCOLOGY | 30 | 3,500 | $3,317 | $1 | premium | 13.4% | (217) 876-4700 |
| 11 | USC CARE MEDICAL GROUP INC | LOS ANGELES | CA | DIAGNOSTIC RADIOLOGY | 1374 | 3,440 | $27,520 | $8 | premium | 8.1% | (800) 872-2273 |
| 12 | SYNERGY HEMATOLOGY ONCOLOGY MEDICAL ASSOCIATES INC | WEST HOLLYWOOD | CA | INTERNAL MEDICINE | 8 | 3,082 | $15,410 | $5 | premium | 7.3% | (323) 525-1111 |
| 13 | HEALTHONE CLINIC SERVICES - ONCOLOGY HEMATOLOGY LLC | DENVER | CO | NURSE PRACTITIONER | 47 | 3,008 | $10,528 | $4 | premium | 54.2% | (720) 754-4800 |
| 14 | ONCOLOGY HEMATOLOGY WEST PC | OMAHA | NE | PHYSICIAN ASSISTANT | 55 | 2,615 | $5,238 | $2 | premium | 75.3% | (402) 393-3110 |
| 15 | AFFILIATED ONCOLOGISTS LLC | OAK LAWN | IL | PHYSICIAN ASSISTANT | 40 | 2,292 | $13,752 | $6 | premium | 8.8% | (708) 684-5475 |
| 16 | SOUTHEASTERN MEDICAL ONCOLOGY CENTER | GOLDSBORO | NC | HEMATOLOGY/ONCOLOGY | 11 | 2,068 | $1,901 | $1 | premium | 61.9% | (919) 580-0000 |
| 17 | BRYN MAWR MEDICAL SPECIALISTS ASSOCIATION | BRYN MAWR | PA | NURSE PRACTITIONER | 134 | 2,054 | $34,850 | $17 | premium | 34.6% | (610) 527-3800 |
| 18 | MEDICAL ONCOLOGY HEMATOLOGY CONSULTANTS PA | NEWARK | DE | HEMATOLOGY/ONCOLOGY | 33 | 1,992 | $11,952 | $6 | premium | 97.1% | (302) 366-1200 |
| 19 | CALIFORNIA CANCER ASSOCIATES FOR RESEARCH AND EXCELLENCE INC | FRESNO | CA | HEMATOLOGY/ONCOLOGY | 62 | 1,844 | $16,596 | $9 | premium | 4.4% | (559) 326-1222 |
| 20 | MCFARLAND CLINIC PC | AMES | IA | PHYSICIAN ASSISTANT | 352 | 1,840 | $5,520 | $3 | premium | 45.2% | (515) 239-4400 |
| 21 | ILLINOIS CANCER SPECIALISTS | ARLINGTON HEIGHTS | IL | HEMATOLOGY/ONCOLOGY | 29 | 1,836 | $11,016 | $6 | premium | 7.0% | (847) 259-4482 |
| 22 | ONCOLOGY AND HEMATOLOGY ASSOCIATES OF SOUTHWEST VIRGINIA INC | ROANOKE | VA | NURSE PRACTITIONER | 52 | 1,828 | $10,968 | $6 | premium | 22.9% | (540) 982-0237 |
| 23 | SOUTHWEST CANCER CARE LLC | SIERRA VISTA | AZ | NURSE PRACTITIONER | 6 | 1,815 | $4,538 | $2 | premium | 31.4% | (520) 220-5020 |
| 24 | NORTHWEST CANCER CENTERS PC | DYER | IN | HEMATOLOGY/ONCOLOGY | 26 | 1,802 | $10,812 | $6 | premium | 45.3% | (812) 220-4476 |
| 25 | MAYO CLINIC JACKSONVILLE | JACKSONVILLE | FL | NURSE PRACTITIONER | 1587 | 1,792 | $32,154 | $18 | premium | 6.4% | (904) 953-2000 |
| 26 | ERIK LUNDQUIST MD INC | TEMECULA | CA | FAMILY PRACTICE | 3 | 1,730 | $43,250 | $25 | premium | 4.1% | 9513834333826 |
| 27 | WILLIAM NOYES MD PC | GRAND FORKS | ND | MEDICAL ONCOLOGY | 4 | 1,712 | $2,226 | $1 | premium | 100.0% | (701) 787-5800 |
| 28 | ADVANCED MEDICAL CARE PLLC | FOREST HILLS | NY | NEUROLOGY | 8 | 1,628 | $47,919 | $29 | premium | 8.1% | (718) 261-8881 |
| 29 | ROCKY MOUNTAIN CANCER CENTERS LLP | COLORADO SPRINGS | CO | NURSE PRACTITIONER | 129 | 1,510 | $9,060 | $6 | premium | 27.2% | (719) 577-2555 |
| 30 | AMERICAN ONCOLOGY PARTNERS PA | FORT WAYNE | GA | HEMATOLOGY/ONCOLOGY | 333 | 1,404 | $2,310 | $2 | premium | 100.0% | (260) 484-8830 |
| 31 | THE WEST CLINIC P.C. | GERMANTOWN | TN | NURSE PRACTITIONER | 113 | 1,346 | $3,213 | $2 | premium | 19.5% | (901) 683-0055 |
| 32 | NEW YORK ONCOLOGY HEMATOLOGY PC | ALBANY | NY | NURSE PRACTITIONER | 83 | 1,303 | $7,818 | $6 | premium | 6.5% | (518) 262-6696 |
| 33 | SANT P CHAWLA M D INC | SANTA MONICA | CA | HEMATOLOGY | 4 | 1,280 | $38,893 | $30 | premium | 3.0% | (310) 552-9999 |
| 34 | CANCER CENTER OF KANSAS PA | WICHITA | KS | HEMATOLOGY/ONCOLOGY | 27 | 1,234 | $7,404 | $6 | premium | 49.6% | (316) 262-4467 |
| 35 | MICHIGAN HEALTHCARE PROFESSIONALS PC | FARMINGTON HILLS | MI | INTERNAL MEDICINE | 518 | 1,197 | $2,704 | $2 | premium | 71.8% | (248) 477-0552 |
| 36 | LAKE CITY CANCER CARE LLC | LAKE CITY | FL | NUCLEAR MEDICINE | 7 | 1,190 | $3,696 | $3 | premium | 4.3% | (386) 755-0601 |
| 37 | BRAIN AND SPINE MEDICAL SERVICES PLLC | WILLIAMSVILLE | NY | PHYSICIAN ASSISTANT | 56 | 1,155 | $26,565 | $23 | premium | 5.8% | (716) 631-3555 |
| 38 | AMERICAN ONCOLOGY PARTNERS PA | FORT WAYNE | IN | HEMATOLOGY/ONCOLOGY | 333 | 1,148 | $2,296 | $2 | premium | 28.9% | (260) 484-8830 |
| 39 | NORTHWEST ONCOLOGY AND HEMATOLOGY SC | ROLLING MEADOWS | IL | HEMATOLOGY/ONCOLOGY | 22 | 1,138 | $6,828 | $6 | premium | 4.4% | (847) 870-4100 |
| 40 | WOODLANDS MEDICAL SPECIALISTS P A | PENSACOLA | FL | PHYSICIAN ASSISTANT | 51 | 1,114 | $6,684 | $6 | premium | 4.0% | (850) 696-4000 |
| 41 | BIRMINGHAM HEMATOLOGY ONCOLOGY ASSOC LLC | BIRMINGHAM | AL | MEDICAL ONCOLOGY | 31 | 1,074 | $6,444 | $6 | premium | 14.8% | (205) 592-5077 |
| 42 | STATE UNIVERSITY OF IOWA | IOWA CITY | IA | PHYSICIAN ASSISTANT | 1902 | 1,072 | $1,270 | $1 | premium | 26.3% | (319) 678-8201 |
| 43 | FOOTHILLS NEUROLOGY P C | PHOENIX | AZ | NEUROLOGY | 10 | 983 | $1,966 | $2 | premium | 17.0% | (480) 961-2365 |
| 44 | SOUTH TEXAS ONCOLOGY AND HEMATOLOGY, PLLC | SAN ANTONIO | TX | HEMATOLOGY/ONCOLOGY | 39 | 962 | $1,679 | $2 | premium | 3.0% | (210) 593-5700 |
| 45 | AMERICAN ONCOLOGY PARTNERS PA | FORT WAYNE | WA | HEMATOLOGY/ONCOLOGY | 333 | 934 | $1,868 | $2 | premium | 16.2% | (260) 484-8830 |
| 46 | NORTHWEST MEDICAL SPECIALTIES PLLC | TACOMA | WA | HEMATOLOGY/ONCOLOGY | 39 | 908 | $1,800 | $2 | premium | 15.8% | (253) 428-8700 |
| 47 | SPINECARE ASSOCIATES, LLC | CLEARWATER | FL | PHYSICAL MEDICINE AND REHABILITATION | 12 | 885 | $442 | $0 | premium | 3.2% | (727) 797-7463 |
| 48 | OGDEN CLINIC SPECIALTY SERVICES LLC | OGDEN | UT | PHYSICIAN ASSISTANT | 133 | 870 | $4,350 | $5 | premium | 42.3% | (801) 475-3800 |
| 49 | HUNTERDON HEMATOLOGY ONCOLOGY, LLC | FLEMINGTON | NJ | HEMATOLOGY/ONCOLOGY | 7 | 865 | $4,717 | $5 | premium | 43.8% | (908) 237-1201 |
| 50 | VIRGINIA CANCER INSTITUTE INCORPORATED | NORTH CHESTERFIELD | VA | HEMATOLOGY/ONCOLOGY | 50 | 860 | $1,344 | $2 | premium | 10.8% | (804) 330-7990 |
| 51 | SACRED HEART HEALTH SYSTEM INC | PENSACOLA | FL | NURSE PRACTITIONER | 371 | 844 | $5,064 | $6 | premium | 3.0% | (850) 416-2400 |
| 52 | NORTH HOUSTON CANCER CLINICS PA | THE WOODLANDS | TX | HEMATOLOGY/ONCOLOGY | 2 | 826 | $5,208 | $6 | premium | 2.6% | (936) 439-5213 |
| 53 | OCALA ONCOLOGY CENTER PL | OCALA | FL | NURSE PRACTITIONER | 23 | 826 | $4,956 | $6 | premium | 3.0% | (352) 732-4032 |
| 54 | ADVANCED MEDICAL CARE PLLC | FOREST HILLS | FL | NEUROLOGY | 8 | 783 | $27,138 | $35 | premium | 2.8% | (718) 261-8881 |
| 55 | LEXINGTON HEALTH INC | WEST COLUMBIA | SC | NURSE PRACTITIONER | 909 | 778 | $941 | $1 | premium | 60.6% | (803) 744-4900 |
| 56 | MANDL MEDICAL SERVICES. P.C. | FAR ROCKAWAY | NY | INTERNAL MEDICINE | 2 | 769 | $9,228 | $12 | premium | 3.8% | (718) 868-8668 |
| 57 | NOVACARE OUTPATIENT REHABILITATION EAST, INC. | COLLEGEVILLE | PA | ORTHOPEDIC SURGERY | 483 | 766 | $2,156 | $3 | premium | 12.9% | (610) 489-7703 |
| 58 | REVERE HEALTH PC | PROVO | UT | PHYSICIAN ASSISTANT | 410 | 762 | $1,524 | $2 | premium | 37.0% | — |
| 59 | MAYO CLINIC ARIZONA | PHOENIX | AZ | PHYSICIAN ASSISTANT | 1635 | 760 | $14,040 | $18 | premium | 13.2% | (800) 603-0558 |
| 60 | CENTRAL CARE PA | BOLIVAR | KS | NURSE PRACTITIONER | 15 | 758 | $1,531 | $2 | premium | 30.5% | (417) 326-7200 |
| 61 | THE REGENTS OF THE UNIVERSITY OF CALIFORNIA | LOS ANGELES | CA | INTERNAL MEDICINE | 1424 | 756 | $3,780 | $5 | premium | 1.8% | (310) 825-7922 |
| 62 | VIRGINIA ONCOLOGY ASSOCIATES | NORFOLK | VA | PHYSICIAN ASSISTANT | 123 | 705 | $4,230 | $6 | premium | 8.9% | — |
| 63 | MONUMENT HEALTH RAPID CITY HOSPITAL INC | RAPID CITY | AR | PHYSICIAN ASSISTANT | 559 | 700 | $3,500 | $5 | premium | 7.8% | (605) 755-7200 |
| 64 | REGENERATIVE MEDICAL CLINICS OF SO CAL INC. | WEST COVINA | CA | NURSE PRACTITIONER | 2 | 700 | $3,500 | $5 | premium | 1.7% | (626) 965-2334 |
| 65 | UNIVERSITY OF MARYLAND COMMUNITY MEDICAL GROUP INC | GLEN BURNIE | MD | NURSE PRACTITIONER | 458 | 700 | $1,540 | $2 | premium | 13.6% | (410) 761-1222 |
| 66 | HEM ONC ASSOCIATES OF THE TREASURE COAST, PA | PORT SAINT LUCIE | FL | HEMATOLOGY/ONCOLOGY | 6 | 665 | $1,330 | $2 | premium | 2.4% | (772) 335-5666 |
| 67 | UNIVERSITY OF TEXAS HEALTH SCIENCE CENTER AT SAN ANTONIO | SAN ANTONIO | TX | PHYSICIAN ASSISTANT | 1326 | 618 | $1,301 | $2 | premium | 1.9% | (210) 450-7044 |
| 68 | NORTHWESTERN MEDICAL FACULTY FOUNDATION | CHICAGO | IL | NURSE PRACTITIONER | 4339 | 606 | $1,818 | $3 | premium | 2.3% | — |
| 69 | JOHN A SHIELDS MD AND STEVEN A SCHIFF MD A PROFESSIONAL CORPORATION | RENO | NV | HEMATOLOGY/ONCOLOGY | 19 | 604 | $1,208 | $2 | premium | 10.3% | (775) 329-0873 |
| 70 | HEALTH FIRST MEDICAL GROUP, LLC | MELBOURNE | FL | NURSE PRACTITIONER | 669 | 570 | $1,140 | $2 | premium | 2.0% | (321) 434-8878 |
| 71 | TRUE NORTH MEDICAL AT NORTH SUFFOLK, PLLC | COMMACK | NY | NEUROLOGY | 20 | 529 | $1,058 | $2 | premium | 2.6% | (631) 364-9119 |
| 72 | LANCASTER CANCER CENTER LTD | LANCASTER | PA | HEMATOLOGY | 4 | 526 | $983 | $2 | premium | 8.9% | (717) 291-1313 |
| 73 | AMERICAN ONCOLOGY PARTNERS PA | FORT WAYNE | NC | HEMATOLOGY/ONCOLOGY | 333 | 519 | $1,038 | $2 | premium | 15.5% | (260) 484-8830 |
| 74 | OKLAHOMA CANCER SPECIALISTS AND RESEARCH INSTITUTE, LLC | TULSA | OK | NURSE PRACTITIONER | 47 | 498 | $1,992 | $4 | premium | 82.5% | (918) 505-3200 |
| 75 | CANCER CARE CENTERS OF BREVARD INC | MELBOURNE | FL | NURSE PRACTITIONER | 17 | 488 | $2,928 | $6 | premium | 1.8% | (321) 434-9000 |
| 76 | MEDICAL HEALING CENTER, LLC | TALLAHASSEE | FL | NURSE PRACTITIONER | 3 | 466 | $9,320 | $20 | premium | 1.7% | (850) 309-1665 |
| 77 | STUART ONCOLOGY ASSOCIATES PA | STUART | FL | PHYSICIAN ASSISTANT | 9 | 462 | $1,386 | $3 | premium | 1.7% | (772) 276-7242 |
| 78 | HEMATOLOGY-ONCOLOGY ASSOCIATES OF CNY, PC | EAST SYRACUSE | NY | NURSE PRACTITIONER | 61 | 438 | $876 | $2 | premium | 2.2% | (315) 472-7504 |
| 79 | NORTHSTAR ANESTHESIA III PA | FORT WORTH | TX | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 396 | 435 | $4,350 | $10 | premium | 1.4% | (817) 926-2544 |
| 80 | ONCOLOGY AND HEMATOLOGY ASSOCIATES OF SOUTHWEST VIRGINIA INC | ROANOKE | NC | NURSE PRACTITIONER | 52 | 428 | $2,568 | $6 | premium | 12.8% | (540) 982-0237 |
| 81 | PHYSICIANS CLINIC OF IOWA PC | CEDAR RAPIDS | IA | NURSE PRACTITIONER | 132 | 412 | $1,957 | $5 | premium | 10.1% | (319) 247-3010 |
| 82 | ADULT MEDICINE SPECIALISTS OF EASLEY PA | EASLEY | SC | PHYSICIAN ASSISTANT | 5 | 411 | $1,233 | $3 | premium | 32.0% | (864) 855-5525 |
| 83 | MARYLAND ONCOLOGY HEMATOLOGY PA | LAUREL | MD | HEMATOLOGY/ONCOLOGY | 99 | 400 | $2,400 | $6 | premium | 7.8% | (301) 982-9800 |
| 84 | SLOCUM DICKSON MEDICAL GROUP PLLC | NEW HARTFORD | NY | PHYSICIAN ASSISTANT | 93 | 380 | $931 | $2 | premium | 1.9% | (315) 798-1500 |
| 85 | ALLERGY AND ASTHMA CENTER, PC | FORT WAYNE | IN | INTERNAL MEDICINE | 5 | 380 | $7,600 | $20 | premium | 9.6% | (260) 432-5005 |
| 86 | SCRIPPS HEALTH | LA JOLLA | CA | PHYSICIAN ASSISTANT | 1431 | 378 | $529 | $1 | premium | 0.9% | (858) 455-9100 |
| 87 | NORTH TEXAS INSTITUTE OF NEUROLOGY AND HEADACHE, PA | FRISCO | TX | NEUROLOGY | 5 | 367 | $5,505 | $15 | premium | 1.1% | (942) 403-8184 |
| 88 | IRONWOOD PHYSICIANS PC | MESA | AZ | HEMATOLOGY/ONCOLOGY | 114 | 354 | $354 | $1 | premium | 6.1% | (480) 981-1326 |
| 89 | MAINE CENTER FOR CANCER MEDICINE AND BLOOD DISORDERS PA | WESTBROOK | ME | HEMATOLOGY/ONCOLOGY | 69 | 354 | $885 | $2 | premium | 100.0% | (207) 303-3300 |
| 90 | HEMATOLOGY AND ONCOLOGY CONSULTANTS PC | OMAHA | NE | HEMATOLOGY/ONCOLOGY | 4 | 348 | $696 | $2 | premium | 10.0% | 40257235353575 |
| 91 | SHENANDOAH ONCOLOGY PC | WINCHESTER | VA | NURSE PRACTITIONER | 22 | 340 | $2,040 | $6 | premium | 4.3% | (540) 662-1108 |
| 92 | ROCKY MOUNTAIN ONCOLOGY CENTER LLC | CASPER | WY | PHYSICIAN ASSISTANT | 8 | 338 | $1,049 | $3 | premium | 100.0% | — |
| 93 | EXECUTIVE MEDICAL CARE PC | BROOKLYN | NY | PHYSICIAN ASSISTANT | 9 | 311 | $1,866 | $6 | premium | 1.6% | (718) 934-0322 |
| 94 | NEBRASKA HEMATOLOGY-ONCOLOGY PC | LINCOLN | NE | PHYSICIAN ASSISTANT | 19 | 310 | $609 | $2 | premium | 8.9% | (402) 484-4900 |
| 95 | KERN RURAL WELLNESS CENTER INC | ARVIN | CA | NURSE PRACTITIONER | 9 | 306 | $7,650 | $25 | premium | 0.7% | — |
| 96 | UNIVERSITY OF PENN - MEDICAL GROUP | PHILADELPHIA | PA | PHYSICIAN ASSISTANT | 3505 | 300 | $1,500 | $5 | premium | 5.1% | (215) 662-2777 |
| 97 | INTEGRATED NEUROLOGY AND PAIN MANAGEMENT PC | VALLEJO | CA | NEUROLOGY | 2 | 300 | $6,000 | $20 | premium | 0.7% | (707) 980-6636 |
| 98 | BRAINFLOW SYSTEMS INC | WEST HOLLYWOOD | CA | NEUROLOGY | 2 | 297 | $2,970 | $10 | premium | 0.7% | (310) 801-5405 |
| 99 | ONCOLOGY-HEMATOLOGY ASSOCIATES OF CENTRAL ILLINOIS P C | PEORIA | KY | NURSE PRACTITIONER | 62 | 294 | $1,500 | $5 | premium | 100.0% | (309) 243-3000 |
| 100 | XBODY HEALTH AND WELLNESS PA | WAYNE | NJ | NURSE PRACTITIONER | 8 | 290 | $72,500 | $250 | premium | 14.7% | (973) 692-9780 |
Showing the top 100 of 164 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 →