83735 — Magnesium level
710,270 observed fee-for-service (49%) · ~739,383 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 | 83735 svcs | Submitted charges | Avg charge | Medicare $ locked column | Share* | Phone |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | NORTH SHORE HEMATOLOGY ONCOLOGY ASSOCIATES PC | SMITHTOWN | NY | NURSE PRACTITIONER | 462 | 77,396 | $5,699,445 | $74 | premium | 29.1% | (631) 751-3000 |
| 2 | YUMA KIDNEY AND DIALYSIS SPECIALISTS PC | YUMA | AZ | NURSE PRACTITIONER | 6 | 37,187 | $512,809 | $14 | premium | 22.0% | (928) 388-6138 |
| 3 | TEXAS ONCOLOGY PA | DALLAS | TX | PHYSICIAN ASSISTANT | 995 | 35,496 | $1,029,360 | $29 | premium | 12.4% | — |
| 4 | FLORIDA CANCER SPECIALISTS AND RESEARCH INSTITUTE, LLC | FORT MYERS | FL | HEMATOLOGY/ONCOLOGY | 437 | 33,390 | $835,664 | $25 | premium | 11.2% | (239) 561-9622 |
| 5 | HIGHLANDS ONCOLOGY GROUP PA | FAYETTEVILLE | AR | NURSE PRACTITIONER | 79 | 24,094 | $602,350 | $25 | premium | 49.4% | (479) 361-2585 |
| 6 | MILLENNIUM PHYSICIAN GROUP LLC | PORT CHARLOTTE | FL | PHYSICIAN ASSISTANT | 953 | 9,808 | $131,427 | $13 | premium | 3.3% | (941) 255-3535 |
| 7 | OKLAHOMA CANCER SPECIALISTS AND RESEARCH INSTITUTE, LLC | TULSA | OK | NURSE PRACTITIONER | 47 | 8,865 | $203,895 | $23 | premium | 16.3% | (918) 505-3200 |
| 8 | RAVI PATEL M D INC | BAKERSFIELD | CA | HEMATOLOGY/ONCOLOGY | 20 | 8,741 | $209,784 | $24 | premium | 2.6% | (661) 322-2206 |
| 9 | ONCOLOGY SPECIALTIES, P.C. | HUNTSVILLE | AL | NURSE PRACTITIONER | 93 | 8,703 | $175,700 | $20 | premium | 9.5% | (256) 705-4224 |
| 10 | AMERICAN ONCOLOGY PARTNERS PA | FORT WAYNE | FL | HEMATOLOGY/ONCOLOGY | 333 | 8,233 | $172,893 | $21 | premium | 2.8% | (260) 484-8830 |
| 11 | MAYO CLINIC ARIZONA | PHOENIX | AZ | PHYSICIAN ASSISTANT | 1635 | 8,073 | $444,015 | $55 | premium | 4.8% | (800) 603-0558 |
| 12 | CONSOLIDATED MEDICAL PRACTICES OF MEMPHIS,PLLC | MEMPHIS | TN | NURSE PRACTITIONER | 114 | 7,631 | $161,106 | $21 | premium | 7.4% | (901) 261-0700 |
| 13 | CANCER CARE SPECIALISTS OF CENTRAL ILLINOIS SC | DECATUR | IL | HEMATOLOGY/ONCOLOGY | 30 | 6,569 | $367,864 | $56 | premium | 3.7% | (217) 876-4700 |
| 14 | ONCOLOGY-HEMATOLOGY ASSOCIATES OF CENTRAL ILLINOIS P C | PEORIA | IL | NURSE PRACTITIONER | 62 | 5,258 | $251,477 | $48 | premium | 3.0% | (309) 243-3000 |
| 15 | CENLA FAMILY MEDICINE ASSOCIATES, LLC | ALEXANDRIA | LA | NURSE PRACTITIONER | 20 | 4,301 | $77,418 | $18 | premium | 16.2% | (318) 445-9823 |
| 16 | SUMMIT MEDICAL GROUP, PLLC | KNOXVILLE | TN | FAMILY PRACTICE | 622 | 4,264 | $68,599 | $16 | premium | 4.2% | (865) 938-3627 |
| 17 | THE NEPHROLOGY GROUP INC | FRESNO | CA | NEPHROLOGY | 51 | 4,199 | $84,400 | $20 | premium | 1.2% | (559) 228-9660 |
| 18 | MCFARLAND CLINIC PC | AMES | IA | PHYSICIAN ASSISTANT | 352 | 4,198 | $104,925 | $25 | premium | 24.3% | (515) 239-4400 |
| 19 | DUPAGE MEDICAL GROUP LTD | GLEN ELLYN | IL | PHYSICIAN ASSISTANT | 1323 | 4,129 | $140,386 | $34 | premium | 2.3% | (630) 469-9200 |
| 20 | ADVANCED INTERNAL MEDICINE GROUP PC | GREENVALE | NY | INTERNAL MEDICINE | 5 | 4,113 | $87,171 | $21 | premium | 1.5% | (516) 352-8100 |
| 21 | EASTERN NEPHROLOGY ASSOCIATES PLLC | GREENVILLE | NC | NEPHROLOGY | 77 | 4,109 | $82,591 | $20 | premium | 1.9% | (252) 752-8880 |
| 22 | CANCER SPECIALISTS LLC | JACKSONVILLE | FL | HEMATOLOGY/ONCOLOGY | 46 | 4,022 | $67,630 | $17 | premium | 1.3% | (904) 516-3737 |
| 23 | SCKE INC | LAGUNA HILLS | CA | ENDOCRINOLOGY | 20 | 4,007 | $152,266 | $38 | premium | 1.2% | (949) 916-9100 |
| 24 | TENNESSEE ONCOLOGY PLLC | NASHVILLE | TN | HEMATOLOGY/ONCOLOGY | 360 | 3,953 | $48,107 | $12 | premium | 3.9% | (615) 385-3751 |
| 25 | MUSC AFFILIATE PHYSICIANS | GREENVILLE | SC | PHYSICIAN ASSISTANT | 52 | 3,798 | $87,354 | $23 | premium | 9.8% | (864) 603-5600 |
| 26 | GENESIS HEALTHCARE, INC | DARLINGTON | SC | NURSE PRACTITIONER | 32 | 3,570 | $113,098 | $32 | premium | 9.2% | (843) 393-7452 |
| 27 | ATRIUS HEALTH INC | BOSTON | MA | NURSE PRACTITIONER | 1196 | 3,485 | $94,095 | $27 | premium | 4.3% | (617) 421-1000 |
| 28 | ENDOCRINE ASSOCIATES OF ROCKLAND LLP | POMONA | NY | ENDOCRINOLOGY | 4 | 3,378 | $50,670 | $15 | premium | 1.3% | (845) 362-3111 |
| 29 | MANALAPAN MEDICAL CENTER PA PC | MANALAPAN | NJ | ENDOCRINOLOGY | 13 | 3,344 | $36,823 | $11 | premium | 0.8% | (732) 845-2200 |
| 30 | NEW YORK ONCOLOGY HEMATOLOGY PC | ALBANY | NY | NURSE PRACTITIONER | 83 | 3,276 | $88,452 | $27 | premium | 1.2% | (518) 262-6696 |
| 31 | CENTRAL ARKANSAS RADIATION THERAPY INSTITUTE INC | LITTLE ROCK | AR | HEMATOLOGY/ONCOLOGY | 90 | 3,128 | $47,172 | $15 | premium | 6.4% | — |
| 32 | OMID S. SHAYE, M.D., A MEDICAL CORPORATION | WEST HILLS | CA | HEMATOLOGY/ONCOLOGY | 3 | 3,086 | $41,352 | $13 | premium | 0.9% | (818) 346-1773 |
| 33 | SOUTHWEST KIDNEY INSTITUTE PLC | PHOENIX | AZ | NEPHROLOGY | 97 | 3,065 | $42,910 | $14 | premium | 1.8% | (623) 247-9235 |
| 34 | MEDSTAR MEDICAL GROUP - SOUTHERN MARYLAND LLC | HOLLYWOOD | MD | INTERNAL MEDICINE | 236 | 3,057 | $76,425 | $25 | premium | 5.8% | — |
| 35 | SYNERGY HEMATOLOGY ONCOLOGY MEDICAL ASSOCIATES INC | WEST HOLLYWOOD | CA | INTERNAL MEDICINE | 8 | 2,882 | $57,665 | $20 | premium | 0.8% | (323) 525-1111 |
| 36 | CLAY PLATTE FAMILY MEDICINE CLINIC | KANSAS CITY | MO | FAMILY PRACTICE | 25 | 2,851 | $39,935 | $14 | premium | 12.9% | (816) 994-8787 |
| 37 | DIABETES AND ENDOCRINOLOGY CONSULTANTS, PC | WEST NYACK | NY | ENDOCRINOLOGY | 5 | 2,846 | $113,840 | $40 | premium | 1.1% | (845) 358-6266 |
| 38 | COLONIAL FAMILY PRACTICE LLC | SUMTER | SC | DIAGNOSTIC RADIOLOGY | 57 | 2,700 | $54,270 | $20 | premium | 7.0% | (803) 773-5227 |
| 39 | MACON MEDICAL GROUP PC | MACON | GA | NEPHROLOGY | 6 | 2,607 | $75,082 | $29 | premium | 3.6% | — |
| 40 | SAN JUAN ONCOLOGY ASSOCIATES PC | FARMINGTON | NM | HEMATOLOGY/ONCOLOGY | 3 | 2,579 | $79,563 | $31 | premium | 24.4% | (505) 564-6850 |
| 41 | CENTRAL OHIO PRIMARY CARE PHYSICIANS, INC. | COLUMBUS | OH | INTERNAL MEDICINE | 495 | 2,561 | $33,293 | $13 | premium | 2.0% | (614) 451-9612 |
| 42 | OPTUM MEDICAL CARE PC | MOUNT KISCO | NY | INTERNAL MEDICINE | 1040 | 2,538 | $39,205 | $15 | premium | 1.0% | (914) 241-1050 |
| 43 | CANCER CENTER OF KANSAS PA | WICHITA | KS | HEMATOLOGY/ONCOLOGY | 27 | 2,509 | $70,252 | $28 | premium | 4.3% | (316) 262-4467 |
| 44 | HASTINGS INTERNAL MEDICINE ASSOCIATES PC | HASTINGS | NE | INTERNAL MEDICINE | 6 | 2,444 | $16,412 | $7 | premium | 17.1% | (402) 463-2454 |
| 45 | ROCKY MOUNTAIN CANCER CENTERS LLP | COLORADO SPRINGS | CO | NURSE PRACTITIONER | 129 | 2,416 | $67,648 | $28 | premium | 13.3% | (719) 577-2555 |
| 46 | APEX CARDIOLOGY CONSULTANTS | INGLEWOOD | CA | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 8 | 2,358 | $37,822 | $16 | premium | 0.7% | (310) 672-3900 |
| 47 | MEDICAL ASSOCIATES OF THE SHOALS, P.C. | SHEFFIELD | AL | NURSE PRACTITIONER | 24 | 2,342 | $46,840 | $20 | premium | 2.6% | 2563834447104 |
| 48 | ROBERT WOOD JOHNSON MEDICAL ASSOCIATES AT HAMILTON PA | LINDEN | NJ | PHYSICIAN ASSISTANT | 47 | 2,327 | $46,773 | $20 | premium | 0.6% | — |
| 49 | BRYAN PHYSICIAN NETWORK | LINCOLN | NE | PHYSICIAN ASSISTANT | 229 | 2,317 | $32,438 | $14 | premium | 16.2% | (402) 481-1111 |
| 50 | RHEUMATIC DISEASE CENTER PHYSICIANS SC | DES PLAINES | IL | RHEUMATOLOGY | 4 | 2,298 | $20,829 | $9 | premium | 1.3% | (847) 800-0998 |
| 51 | FAMILY PHYSICIANS OF SPARTANBURG, PC | SPARTANBURG | SC | FAMILY PRACTICE | 10 | 2,285 | $66,265 | $29 | premium | 5.9% | (864) 576-9201 |
| 52 | CLEVELAND CLINIC | CLEVELAND | OH | PHYSICIAN ASSISTANT | 6828 | 2,282 | $39,483 | $17 | premium | 1.8% | — |
| 53 | CARDIOVASCULAR CARE INC | LOS ALAMITOS | CA | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 6 | 2,263 | $29,419 | $13 | premium | 0.7% | (562) 594-1772 |
| 54 | HORIZON INTERNAL MEDICINE PLLC | HIGH POINT | NC | NURSE PRACTITIONER | 15 | 2,260 | $31,640 | $14 | premium | 1.1% | (336) 610-1300 |
| 55 | TIDEWATER PHYSICIANS MULTISPECIALTY GROUP, PC | NEWPORT NEWS | VA | FAMILY PRACTICE | 274 | 2,258 | $54,192 | $24 | premium | 4.1% | (757) 595-9880 |
| 56 | MOUNTAIN COMPREHENSIVE HEALTH CORPORATION | WHITESBURG | KY | NURSE PRACTITIONER | 83 | 2,252 | $90,080 | $40 | premium | 12.9% | (606) 633-4871 |
| 57 | ST VINCENT MEDICAL GROUP | LITTLE ROCK | AR | FAMILY PRACTICE | 247 | 2,251 | $42,769 | $19 | premium | 4.6% | (501) 562-4838 |
| 58 | NEPHROLOGY HYPERTENSION ASSOCIATES OF CNY, PC | NORTH SYRACUSE | NY | NEPHROLOGY | 4 | 2,240 | $94,080 | $42 | premium | 0.8% | — |
| 59 | LEXINGTON HEALTH INC | WEST COLUMBIA | SC | NURSE PRACTITIONER | 909 | 2,180 | $50,140 | $23 | premium | 5.6% | (803) 744-4900 |
| 60 | CRYSTAL RUN HEALTHCARE PHYSICIANS LLP | MIDDLETOWN | NY | NURSE PRACTITIONER | 372 | 2,026 | $56,728 | $28 | premium | 0.8% | (845) 703-6999 |
| 61 | BAPTIST HEALTH | LITTLE ROCK | AR | NURSE PRACTITIONER | 106 | 1,959 | $48,975 | $25 | premium | 4.0% | (501) 227-7596 |
| 62 | SOUTHERN CLINIC PC | DOTHAN | AL | NURSE PRACTITIONER | 25 | 1,956 | $29,340 | $15 | premium | 2.1% | (334) 794-6611 |
| 63 | NORTHWEST CANCER CENTERS PC | DYER | IN | HEMATOLOGY/ONCOLOGY | 26 | 1,936 | $54,208 | $28 | premium | 8.8% | (812) 220-4476 |
| 64 | NICHOLAS R HALPER MD PC | ROCKVILLE CENTRE | NY | FAMILY PRACTICE | 7 | 1,905 | $30,499 | $16 | premium | 0.7% | (516) 536-2221 |
| 65 | HARBIN CLINIC LLC | ROME | GA | NURSE PRACTITIONER | 252 | 1,892 | $47,300 | $25 | premium | 2.6% | (762) 235-3340 |
| 66 | NORTHWEST LOUISIANA NEPHROLOGY, LLC | SHREVEPORT | LA | NEPHROLOGY | 22 | 1,886 | $20,135 | $11 | premium | 7.1% | (318) 227-8899 |
| 67 | TENNESSEE CANCER SPECIALISTS PLLC | KNOXVILLE | TN | NURSE PRACTITIONER | 65 | 1,885 | $66,580 | $35 | premium | 1.8% | (865) 934-5800 |
| 68 | N RAO BOORGU MD PC | FLORENCE | AL | NEPHROLOGY | 5 | 1,884 | $32,028 | $17 | premium | 2.1% | (256) 766-1401 |
| 69 | VMD PRIMARY PROVIDERS EASTERN MICHIGAN PC | NOVI | MI | PHYSICIAN ASSISTANT | 64 | 1,878 | $56,340 | $30 | premium | 4.2% | — |
| 70 | COMMUNITY MEDICAL ASSOCIATES INC | LOUISVILLE | KY | NURSE PRACTITIONER | 1377 | 1,873 | $54,825 | $29 | premium | 10.7% | (502) 937-2209 |
| 71 | INTERNAL MEDICINE ASSOCIATES OF PALESTINE, PA | PALESTINE | TX | ENDOCRINOLOGY | 3 | 1,867 | $33,606 | $18 | premium | 0.6% | (903) 729-3993 |
| 72 | BEACON MEDICAL GROUP INC | SOUTH BEND | IN | NURSE PRACTITIONER | 575 | 1,852 | $33,248 | $18 | premium | 8.4% | (574) 647-7275 |
| 73 | MAGNOLIA MEDICAL CLINIC P.A. | FORT WALTON BEACH | FL | FAMILY PRACTICE | 10 | 1,811 | $45,275 | $25 | premium | 0.6% | (850) 243-7681 |
| 74 | HUNTERDON HEMATOLOGY ONCOLOGY, LLC | FLEMINGTON | NJ | HEMATOLOGY/ONCOLOGY | 7 | 1,809 | $57,888 | $32 | premium | 0.4% | (908) 237-1201 |
| 75 | GALEN MEDICAL GROUP, PC | CHATTANOOGA | TN | NURSE PRACTITIONER | 123 | 1,794 | $77,142 | $43 | premium | 1.7% | (423) 643-2500 |
| 76 | CARDIOVASCULAR MEDICAL GROUP OF SOUTHERN CALIFORNIA | BEVERLY HILLS | CA | CARDIOVASCULAR DISEASE (CARDIOLOGY) | 11 | 1,781 | $28,498 | $16 | premium | 0.5% | (310) 278-3400 |
| 77 | PRINE HEALTH MEDICAL GROUP, PLLC | MANHASSET | NY | NEPHROLOGY | 75 | 1,777 | $29,765 | $17 | premium | 0.7% | (516) 407-2727 |
| 78 | YIUM, SHENOUDA AND MILLER PTRSHP | CHATTANOOGA | TN | NEPHROLOGY | 49 | 1,761 | $70,792 | $40 | premium | 1.7% | (423) 698-0927 |
| 79 | ADVOCATE HEALTH AND HOSPITALS CORPORATION | BUFFALO GROVE | IL | NURSE PRACTITIONER | 3045 | 1,739 | $69,536 | $40 | premium | 1.0% | (847) 459-1160 |
| 80 | RHEUMATOLOGY CONSULTANTS, LLP | HEWLETT | NY | RHEUMATOLOGY | 10 | 1,697 | $42,450 | $25 | premium | 0.6% | (516) 295-4481 |
| 81 | PAIN TREATMENT CENTERS OF AMERICA PLLC | LITTLE ROCK | AR | NURSE PRACTITIONER | 69 | 1,694 | $23,304 | $14 | premium | 3.5% | — |
| 82 | CHRISTIE CLINIC, PLLC | CHAMPAIGN | IL | INTERNAL MEDICINE | 220 | 1,688 | $84,400 | $50 | premium | 1.0% | (217) 366-1200 |
| 83 | ISLAND PRIMARY MEDICAL CARE ASSOCIATES PC | MASSAPEQUA | NY | INTERNAL MEDICINE | 5 | 1,667 | $38,341 | $23 | premium | 0.6% | (516) 798-1116 |
| 84 | ENDOCRINE AND DIABETES PA | LIVINGSTON | NJ | ENDOCRINOLOGY | 2 | 1,661 | $16,245 | $10 | premium | 0.4% | (973) 322-7200 |
| 85 | BEAUMONT INTERNAL MEDICINE AND GERIATRIC ASSOC. | BEAUMONT | TX | NURSE PRACTITIONER | 17 | 1,606 | $27,302 | $17 | premium | 0.6% | (409) 898-2994 |
| 86 | INTEGRATED MEDICAL GROUP, P.C. | POTTSVILLE | PA | PHYSICIAN ASSISTANT | 107 | 1,592 | $30,248 | $19 | premium | 2.3% | — |
| 87 | WASHINGTON UNIVERSITY | SAINT LOUIS | MO | NURSE PRACTITIONER | 3070 | 1,566 | $57,942 | $37 | premium | 7.1% | (314) 747-3000 |
| 88 | NORTH MISSISSIPPI MEDICAL CLINICS INC | TUPELO | MS | FAMILY PRACTICE | 121 | 1,563 | $39,075 | $25 | premium | 7.4% | (662) 377-5300 |
| 89 | THE SOUTH BEND CLINIC LLC | SOUTH BEND | IN | NURSE PRACTITIONER | 166 | 1,556 | $31,120 | $20 | premium | 7.1% | (574) 234-8161 |
| 90 | NOVANT HEALTH MEDICAL GROUP COASTAL REGION LLC | WILMINGTON | NC | PHYSICIAN ASSISTANT | 560 | 1,542 | $53,970 | $35 | premium | 0.7% | (910) 662-6000 |
| 91 | BARNABAS HEALTH MEDICAL GROUP PC | LIVINGSTON | NJ | NURSE PRACTITIONER | 990 | 1,502 | $42,056 | $28 | premium | 0.4% | — |
| 92 | NAUSHIN SIDDIQUI PHYSICIAN PC | EAST MEADOW | NY | INTERNAL MEDICINE | 2 | 1,502 | $45,060 | $30 | premium | 0.6% | (516) 481-2000 |
| 93 | CANCER AND HEMATOLOGY CENTERS OF WESTERN MI, P.C. | GRAND RAPIDS | MI | HEMATOLOGY/ONCOLOGY | 112 | 1,501 | $34,193 | $23 | premium | 3.4% | (616) 954-9800 |
| 94 | INTERNAL MEDICINE ASSOCIATES OF WAYCROSS P.C. | WAYCROSS | GA | INTERNAL MEDICINE | 5 | 1,494 | $143,424 | $96 | premium | 2.1% | (912) 283-9423 |
| 95 | COASTAL CAROLINA HEALTH CARE PA | NEW BERN | NC | PHYSICIAN ASSISTANT | 122 | 1,481 | $31,101 | $21 | premium | 0.7% | (252) 634-3278 |
| 96 | SOUTH TEXAS ONCOLOGY AND HEMATOLOGY, PLLC | SAN ANTONIO | TX | HEMATOLOGY/ONCOLOGY | 39 | 1,481 | $29,768 | $20 | premium | 0.5% | (210) 593-5700 |
| 97 | ANDERSON ONCOLOGY-HEMATOLOGY CLINIC PA | ANDERSON | SC | HEMATOLOGY/ONCOLOGY | 4 | 1,466 | $69,276 | $47 | premium | 3.8% | (864) 512-1658 |
| 98 | NORTHWEST ONCOLOGY AND HEMATOLOGY SC | ROLLING MEADOWS | IL | HEMATOLOGY/ONCOLOGY | 22 | 1,450 | $79,655 | $55 | premium | 0.8% | (847) 870-4100 |
| 99 | MICHIGAN HEALTHCARE PROFESSIONALS PC | FARMINGTON HILLS | MI | INTERNAL MEDICINE | 518 | 1,406 | $19,684 | $14 | premium | 3.1% | (248) 477-0552 |
| 100 | THE FAMILY PRACTICE/AFTER HOURS CLINIC, PLLC | HATTIESBURG | MS | FAMILY PRACTICE | 7 | 1,404 | $28,080 | $20 | premium | 6.6% | (601) 261-5710 |
Showing the top 100 of 824 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 →