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Counts on this page are exact Medicare fee-for-service claims — a floor,
not a market estimate. FAQ
86431 — Rheumatoid factor level
Billing groups
203
Named-group FFS services
35,833
FFS of Medicare
49%
Services YoY
-1.7%
FFS enrollment -2.2%
Estimated all-Medicare volume
FFS + estimated MA
estimate
~73,460
services
35,833 observed fee-for-service (49%) · ~37,627 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
Top states — 86431 (CY2024)
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.
Named-group submitted charges
$918K
Named-group allowed amount
$198K
Named-group Medicare payments
$198K
Avg charge / svc
$26
Avg allowed / svc
$6
Avg payment / svc
$6
$6
203 groups · avg submitted charge / service
$223
Market analyticsPlatform
a taste of the twelve-year trend layer
- 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 | 86431 svcs | Submitted charges | Avg charge | Medicare $ locked column | Share* | Phone |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | TEXAS ARTHRITIS AND RHEUMATOLOGY | TYLER | TX | PHYSICIAN ASSISTANT | 5 | 2,080 | $41,600 | $20 | premium | 4.0% | (903) 561-9255 |
| 2 | NORTH SHORE HEMATOLOGY ONCOLOGY ASSOCIATES PC | SMITHTOWN | NY | NURSE PRACTITIONER | 462 | 1,226 | $35,445 | $29 | premium | 5.4% | (631) 751-3000 |
| 3 | RHEUMATOLOGY ASSOCIATES AND SUBSIDIARY | DALLAS | TX | RHEUMATOLOGY | 23 | 1,040 | $17,690 | $17 | premium | 2.0% | (214) 540-0700 |
| 4 | OKLAHOMA ARTHRITIS CENTER, P.C. | EDMOND | OK | PHYSICIAN ASSISTANT | 45 | 1,012 | $20,240 | $20 | premium | 17.9% | — |
| 5 | FLORIDA CANCER SPECIALISTS AND RESEARCH INSTITUTE, LLC | FORT MYERS | FL | HEMATOLOGY/ONCOLOGY | 437 | 1,007 | $20,140 | $20 | premium | 2.4% | (239) 561-9622 |
| 6 | EMERALD COAST RHEUMATOLOGY LLC | LYNN HAVEN | FL | NURSE PRACTITIONER | 10 | 844 | $14,205 | $17 | premium | 2.0% | (850) 215-6400 |
| 7 | ARIZONA ARTHRITIS AND RHEUMATOLOGY ASSOCIATES P C | PHOENIX | AZ | RHEUMATOLOGY | 41 | 777 | $14,763 | $19 | premium | 4.6% | (480) 443-8400 |
| 8 | RHEUMATOLOGY ASSOCIATES OF SOUTH TEXAS, PLLC | SAN ANTONIO | TX | NURSE PRACTITIONER | 17 | 729 | $10,920 | $15 | premium | 1.4% | (210) 265-8851 |
| 9 | BORIS D RATINER, MD, INC | TARZANA | CA | RHEUMATOLOGY | 6 | 712 | $24,920 | $35 | premium | 0.7% | (818) 996-4077 |
| 10 | NAUSHIN SIDDIQUI PHYSICIAN PC | EAST MEADOW | NY | INTERNAL MEDICINE | 2 | 700 | $70,000 | $100 | premium | 3.1% | (516) 481-2000 |
| 11 | GRAVES GILBERT CLINIC PLLC | BOWLING GREEN | KY | NURSE PRACTITIONER | 221 | 651 | $16,854 | $26 | premium | 27.1% | (270) 781-4043 |
| 12 | RHEUMATOLOGY ASSOCIATES OF NORTH ALABAMA, PC | HUNTSVILLE | AL | RHEUMATOLOGY | 10 | 640 | $10,880 | $17 | premium | 4.3% | (256) 551-6510 |
| 13 | CONSOLIDATED MEDICAL PRACTICES OF MEMPHIS,PLLC | MEMPHIS | TN | NURSE PRACTITIONER | 114 | 515 | $8,180 | $16 | premium | 4.2% | (901) 261-0700 |
| 14 | OPTUM MEDICAL CARE PC | MOUNT KISCO | NY | INTERNAL MEDICINE | 1040 | 485 | $8,740 | $18 | premium | 2.2% | (914) 241-1050 |
| 15 | ARTHRITIS AND RHEUMATOLOGY CENTER PC | ROSWELL | GA | RHEUMATOLOGY | 22 | 476 | $22,487 | $47 | premium | 3.8% | (770) 284-3150 |
| 16 | WEST SUBURBAN CTR FOR ARTHRITIS | WAUKESHA | WI | RHEUMATOLOGY | 5 | 472 | $19,352 | $41 | premium | 12.5% | (262) 785-0777 |
| 17 | CENTER FOR RHEUMATOLOGY MEDICAL CORPORATION | LOS ANGELES | CA | RHEUMATOLOGY | 9 | 458 | $6,412 | $14 | premium | 0.4% | (310) 659-7878 |
| 18 | ARTHRITIS ASSOCIATES, P.A. | SAN ANTONIO | TX | RHEUMATOLOGY | 6 | 448 | $7,168 | $16 | premium | 0.9% | 2104772626242 |
| 19 | CAREMED PRIMARY AND URGENT CARE PC | PATCHOGUE | NY | NURSE PRACTITIONER | 21 | 443 | $8,860 | $20 | premium | 2.0% | (631) 475-3900 |
| 20 | ARTICULARIS HEALTHCARE GROUP INC | SUMMERVILLE | SC | RHEUMATOLOGY | 47 | 441 | $8,820 | $20 | premium | 17.6% | (843) 572-4840 |
| 21 | SAMY METYAS M.D. INC | COVINA | CA | RHEUMATOLOGY | 3 | 427 | $6,405 | $15 | premium | 0.4% | (626) 966-1909 |
| 22 | ILLINOIS BONE AND JOINT INSTITUTE, LLC | BANNOCKBURN | IL | ORTHOPEDIC SURGERY | 595 | 406 | $18,270 | $45 | premium | 3.6% | — |
| 23 | DUPAGE MEDICAL GROUP LTD | GLEN ELLYN | IL | PHYSICIAN ASSISTANT | 1323 | 397 | $11,513 | $29 | premium | 3.6% | (630) 469-9200 |
| 24 | THE ARTHRITIS AND DIABETES CLINIC INC | MONROE | LA | NURSE PRACTITIONER | 4 | 380 | $11,400 | $30 | premium | 21.1% | (318) 388-5830 |
| 25 | RHEUMATIC DISEASE CENTER PHYSICIANS SC | DES PLAINES | IL | RHEUMATOLOGY | 4 | 368 | $2,987 | $8 | premium | 3.3% | (847) 800-0998 |
| 26 | WEITZNER YONKER AND KAINE MD PA | SARASOTA | FL | RHEUMATOLOGY | 17 | 355 | $3,540 | $10 | premium | 0.8% | 94136507701028 |
| 27 | LAKE CUMBERLAND RHEUMATOLOGY PLLC | BOWLING GREEN | KY | RHEUMATOLOGY | 20 | 346 | $6,920 | $20 | premium | 14.4% | (606) 802-2300 |
| 28 | NASSERI CLINIC OF ARTHRITIC AND RHEUMATIC DISEASES LLC | CATONSVILLE | MD | NURSE PRACTITIONER | 8 | 341 | $4,433 | $13 | premium | 5.6% | (410) 744-0661 |
| 29 | ARTHRITIS HEALTH ASSOCIATES PLLC | SYRACUSE | NY | RHEUMATOLOGY | 5 | 318 | $11,130 | $35 | premium | 1.4% | (315) 475-7669 |
| 30 | ARTHRITIS AND RHEUMATISM ASSOCIATES PC | ROCKVILLE | MD | RHEUMATOLOGY | 56 | 313 | $6,260 | $20 | premium | 5.2% | (301) 942-7600 |
| 31 | CAROLINA ARTHRITIS CENTER PA | GREENVILLE | NC | NURSE PRACTITIONER | 5 | 295 | $5,900 | $20 | premium | 0.7% | (252) 321-8474 |
| 32 | INLAND RHEUMATOLOGY AND OSTEOPOROSIS MEDICAL GROUP INC | UPLAND | CA | RHEUMATOLOGY | 4 | 293 | $10,548 | $36 | premium | 0.3% | (909) 982-0099 |
| 33 | KANSAS CITY PHYSICIAN PARTNERS INC | KANSAS CITY | MO | RHEUMATOLOGY | 16 | 284 | $16,660 | $59 | premium | 27.4% | (913) 258-2116 |
| 34 | CRYSTAL RUN HEALTHCARE PHYSICIANS LLP | MIDDLETOWN | NY | NURSE PRACTITIONER | 372 | 280 | $4,480 | $16 | premium | 1.2% | (845) 703-6999 |
| 35 | RHEUMATOLOGY ASSOCIATES OF NORTH JERSEY | TEANECK | NJ | RHEUMATOLOGY | 7 | 269 | $6,698 | $25 | premium | 0.4% | (201) 837-7788 |
| 36 | CENTRAL ARKANSAS RADIATION THERAPY INSTITUTE INC | LITTLE ROCK | AR | HEMATOLOGY/ONCOLOGY | 90 | 246 | $3,198 | $13 | premium | 19.9% | — |
| 37 | RHEUMATOLOGY SPECIALISTS OF PADUCAH PLLC | PADUCAH | KY | PHYSICIAN ASSISTANT | 3 | 246 | $2,790 | $11 | premium | 10.3% | (270) 408-6100 |
| 38 | ARTHRITIS SPECIALTY CENTER,INC | POCATELLO | ID | PHYSICIAN ASSISTANT | 6 | 244 | $8,784 | $36 | premium | 53.9% | (208) 234-1300 |
| 39 | RHEUMATOLOGY ASSOCIATES, P.C. | INDIANAPOLIS | IN | RHEUMATOLOGY | 7 | 244 | $6,100 | $25 | premium | 15.8% | (317) 844-6444 |
| 40 | RHEUMATOLOGY CONSULTANTS, LLP | HEWLETT | NY | RHEUMATOLOGY | 10 | 241 | $6,025 | $25 | premium | 1.1% | (516) 295-4481 |
| 41 | INTERVENTIONAL PAIN CONSULTANTS | CLEVELAND | TN | NURSE PRACTITIONER | 16 | 240 | $3,840 | $16 | premium | 2.0% | (423) 339-9581 |
| 42 | BETHANY MEDICAL CENTER | HIGH POINT | NC | PHYSICIAN ASSISTANT | 63 | 234 | $2,808 | $12 | premium | 0.6% | (336) 883-0029 |
| 43 | AUSTIN REGIONAL CLINIC PA | AUSTIN | TX | FAMILY PRACTICE | 389 | 226 | $3,842 | $17 | premium | 0.4% | (512) 346-6611 |
| 44 | ARTHRITIS ASSOCIATES OF S FLORIDA | DELRAY BEACH | FL | RHEUMATOLOGY | 6 | 226 | $5,650 | $25 | premium | 0.5% | (561) 495-0600 |
| 45 | ST VINCENT MEDICAL GROUP | LITTLE ROCK | AR | FAMILY PRACTICE | 247 | 220 | $3,520 | $16 | premium | 17.8% | (501) 562-4838 |
| 46 | THE CAROLINA CENTER FOR RHEUMATOLOGY AND ARTHRITIS CARE, PA | ROCK HILL | SC | RHEUMATOLOGY | 2 | 219 | $14,454 | $66 | premium | 8.7% | (803) 329-1660 |
| 47 | BAPTIST MEMORIAL MEDICAL GROUP, INC. | MEMPHIS | TN | NURSE PRACTITIONER | 549 | 216 | $5,832 | $27 | premium | 1.8% | (901) 226-3882 |
| 48 | PRIMARY CARE GROUP, LLC | MEMPHIS | TN | NURSE PRACTITIONER | 109 | 203 | $4,266 | $21 | premium | 1.7% | (901) 387-2900 |
| 49 | CONSULTANTS IN PAIN MANAGEMENT, P.C. | CHATTANOOGA | TN | NURSE PRACTITIONER | 11 | 203 | $3,248 | $16 | premium | 1.7% | (423) 648-8480 |
| 50 | CLEVELAND CLINIC | CLEVELAND | OH | PHYSICIAN ASSISTANT | 6828 | 202 | $8,939 | $44 | premium | 1.3% | — |
| 51 | ARTHRITIS AND RHEUMATOLOGY CLINICS OF KANSAS LLC | WICHITA | KS | RHEUMATOLOGY | 11 | 199 | $4,975 | $25 | premium | 1.9% | 31661248151280 |
| 52 | TEAMWORK HEALTH PLLC | FAYETTEVILLE | NC | NURSE PRACTITIONER | 7 | 193 | $8,878 | $46 | premium | 0.5% | (910) 491-6793 |
| 53 | ARTHRITIS AND RHEUMATOLOGY CONSULTANTS PA | EDINA | MN | RHEUMATOLOGY | 12 | 190 | $3,610 | $19 | premium | 7.3% | (952) 893-1959 |
| 54 | FACULTY PHYSICIANS AND SURGEONS OF LLUSM | LOMA LINDA | CA | DIAGNOSTIC RADIOLOGY | 1317 | 190 | $12,160 | $64 | premium | 0.2% | — |
| 55 | STRAND PHYSICIAN SPECIALISTS PA | MYRTLE BEACH | SC | PHYSICIAN ASSISTANT | 55 | 189 | $8,694 | $46 | premium | 7.5% | (843) 497-5929 |
| 56 | MIDDLETOWN MEDICAL PC | MIDDLETOWN | NY | NURSE PRACTITIONER | 172 | 188 | $1,145 | $6 | premium | 0.8% | (845) 342-4774 |
| 57 | CHRISTIE CLINIC, PLLC | CHAMPAIGN | IL | INTERNAL MEDICINE | 220 | 180 | $11,520 | $64 | premium | 1.6% | (217) 366-1200 |
| 58 | BEACON MEDICAL GROUP INC | SOUTH BEND | IN | NURSE PRACTITIONER | 575 | 180 | $2,520 | $14 | premium | 11.7% | (574) 647-7275 |
| 59 | ARTHRITIS AND OSTEOPOROSIS CLINIC OF BRAZOS VALLEY | COLLEGE STATION | TX | PHYSICIAN ASSISTANT | 3 | 180 | $4,201 | $23 | premium | 0.3% | (979) 696-8000 |
| 60 | MILLENNIUM PHYSICIAN GROUP LLC | PORT CHARLOTTE | FL | PHYSICIAN ASSISTANT | 953 | 179 | $2,030 | $11 | premium | 0.4% | (941) 255-3535 |
| 61 | PHYSICIANS CLINIC OF IOWA PC | CEDAR RAPIDS | IA | NURSE PRACTITIONER | 132 | 179 | $4,296 | $24 | premium | 13.6% | (319) 247-3010 |
| 62 | ASSOCIATED PAIN SPECIALISTS, PC | KNOXVILLE | TN | PHYSICIAN ASSISTANT | 12 | 176 | $2,496 | $14 | premium | 1.4% | (865) 558-3476 |
| 63 | CRYSTAL ARTHRITIS CENTER, INC. | AKRON | OH | RHEUMATOLOGY | 5 | 176 | $6,336 | $36 | premium | 1.1% | (330) 670-4026 |
| 64 | PREMIER HEALTHCARE ASSOCIATES, INC. | RICHMOND | VA | RHEUMATOLOGY | 6 | 175 | $2,100 | $12 | premium | 4.8% | (804) 288-7901 |
| 65 | CAROLINA ARTHRITIS ASSOCIATES PA | WILMINGTON | NC | RHEUMATOLOGY | 5 | 174 | $2,088 | $12 | premium | 0.4% | (910) 762-1182 |
| 66 | IDAHO ARTHRITIS AND OSTEOPOROSIS CENTER PC | MERIDIAN | ID | RHEUMATOLOGY | 6 | 174 | $2,610 | $15 | premium | 38.4% | (208) 887-9500 |
| 67 | SUMMIT MEDICAL GROUP PA | BERKELEY HEIGHTS | NJ | PHYSICIAN ASSISTANT | 1183 | 168 | $4,032 | $24 | premium | 0.2% | (908) 273-4300 |
| 68 | ARTHRITIS AND OSTEOPOROSIS ASSOCIATES, LLP | LUBBOCK | TX | PHYSICIAN ASSISTANT | 6 | 165 | $3,300 | $20 | premium | 0.3% | (806) 771-2400 |
| 69 | RONALD C FAGAN MD PC | FARMINGDALE | NY | INTERNAL MEDICINE | 4 | 165 | $2,475 | $15 | premium | 0.7% | (516) 752-7000 |
| 70 | MEDICAL ASSOCIATES OF NORTHWEST ARKANSAS, PA | FAYETTEVILLE | AR | FAMILY PRACTICE | 106 | 162 | $3,888 | $24 | premium | 13.1% | (479) 521-0200 |
| 71 | ARTHRITIS ASSOCIATES | HIXSON | TN | RHEUMATOLOGY | 4 | 161 | $8,050 | $50 | premium | 1.3% | (423) 826-0800 |
| 72 | AMERICAN ONCOLOGY PARTNERS PA | FORT WAYNE | FL | HEMATOLOGY/ONCOLOGY | 333 | 160 | $2,880 | $18 | premium | 0.4% | (260) 484-8830 |
| 73 | SUMMIT MEDICAL GROUP, PLLC | KNOXVILLE | TN | FAMILY PRACTICE | 622 | 156 | $2,184 | $14 | premium | 1.3% | (865) 938-3627 |
| 74 | CAROLINAEAST PHYSICIANS | NEW BERN | NC | NURSE PRACTITIONER | 203 | 154 | $6,776 | $44 | premium | 0.4% | (252) 635-6777 |
| 75 | IMC-DIAGNOSTIC AND MEDICAL CLINIC LLC | MOBILE | AL | INTERNAL MEDICINE | 167 | 149 | $1,639 | $11 | premium | 1.0% | — |
| 76 | HERITAGE MEDICAL ASSOCIATES PC | NASHVILLE | TN | INTERNAL MEDICINE | 166 | 143 | $1,287 | $9 | premium | 1.2% | (629) 255-2115 |
| 77 | COMMUNITY CARE PHYSICIANS PLLC | LATHAM | NY | DIAGNOSTIC RADIOLOGY | 370 | 140 | $2,240 | $16 | premium | 0.6% | (518) 782-3700 |
| 78 | SOUTHEASTERN RHEUMATOLOGY ALLIANCE | GAINESVILLE | GA | RHEUMATOLOGY | 23 | 139 | $2,780 | $20 | premium | 1.1% | (770) 531-3711 |
| 79 | WILMINGTON HEALTH PLLC | WILMINGTON | NC | PHYSICIAN ASSISTANT | 393 | 138 | $6,486 | $47 | premium | 0.3% | (910) 341-1540 |
| 80 | RHEUMATOLOGY ASSOCIATES PC | SPRINGFIELD | MA | RHEUMATOLOGY | 4 | 137 | $4,384 | $32 | premium | 1.7% | — |
| 81 | OPTUM MEDICAL CARE PC | MOUNT KISCO | ME | INTERNAL MEDICINE | 1040 | 133 | $1,046 | $8 | premium | 34.3% | (914) 241-1050 |
| 82 | SUTTER BAY MEDICAL FOUNDATION | PALO ALTO | CA | INTERNAL MEDICINE | 3716 | 133 | $5,054 | $38 | premium | 0.1% | (415) 600-1020 |
| 83 | IOWA ARTHRITIS AND OSTEOPOROSIS CENTER PC | URBANDALE | IA | RHEUMATOLOGY | 15 | 133 | $3,857 | $29 | premium | 10.1% | (515) 270-7222 |
| 84 | ARTHRITIS CLINIC, PLLC | JACKSON | TN | RHEUMATOLOGY | 2 | 132 | $3,168 | $24 | premium | 1.1% | (731) 664-0002 |
| 85 | NORTHEAST GEORGIA DIAGNOSTIC ASSOCIATES AND CLINIC, LLC | GAINESVILLE | GA | PHYSICIAN ASSISTANT | 83 | 128 | $2,432 | $19 | premium | 1.0% | (770) 536-9864 |
| 86 | BEND MEMORIAL CLINIC PC | BEND | OR | PHYSICIAN ASSISTANT | 233 | 127 | $1,905 | $15 | premium | 5.9% | (541) 382-2811 |
| 87 | SOLAIMAN CHOWDHURY MEDICAL CARE PC | EAST ISLIP | NY | NURSE PRACTITIONER | 4 | 126 | $4,410 | $35 | premium | 0.6% | (631) 581-0090 |
| 88 | WHITE-WILSON MEDICAL CENTER PA | FORT WALTON BEACH | FL | NURSE PRACTITIONER | 45 | 124 | $1,984 | $16 | premium | 0.3% | (850) 863-8150 |
| 89 | RHEUMATOLOGY ASSOCIATES OF NORTH JERSEY | TEANECK | NY | RHEUMATOLOGY | 7 | 124 | $3,088 | $25 | premium | 0.6% | (201) 837-7788 |
| 90 | PRIVIA MEDICAL GROUP INDIANA LLC | ELKHART | IN | NURSE PRACTITIONER | 40 | 124 | $2,728 | $22 | premium | 8.0% | 57429632003973 |
| 91 | HARBIN CLINIC LLC | ROME | GA | NURSE PRACTITIONER | 252 | 124 | $9,920 | $80 | premium | 1.0% | (762) 235-3340 |
| 92 | ARTHRITIS NORTHWEST PLLC | SPOKANE | WA | PHYSICIAN ASSISTANT | 9 | 120 | $1,800 | $15 | premium | 1.7% | (509) 838-6500 |
| 93 | CAROLINA ARTHRITIS CENTER PA | GREENVILLE | KY | NURSE PRACTITIONER | 5 | 119 | $2,380 | $20 | premium | 5.0% | (252) 321-8474 |
| 94 | ARTHRITIS CARE SPECIALISTS OF MARYLAND, P.A. | COLUMBIA | MD | RHEUMATOLOGY | 7 | 117 | $2,129 | $18 | premium | 1.9% | (410) 992-7440 |
| 95 | THE WEST CLINIC P.C. | GERMANTOWN | TN | NURSE PRACTITIONER | 113 | 109 | $2,164 | $20 | premium | 0.9% | (901) 683-0055 |
| 96 | RHEUMATOLOGY ASSOCIATES, PC | BETTENDORF | IA | RHEUMATOLOGY | 6 | 108 | $1,296 | $12 | premium | 8.2% | (563) 359-4440 |
| 97 | VIPUL JOSHI, MD PA | BRANDON | FL | NURSE PRACTITIONER | 7 | 104 | $4,056 | $39 | premium | 0.2% | (813) 651-4441 |
| 98 | ASSOCIATED CLINICIANS OF EAST TEXAS | LONGVIEW | TX | PHYSICIAN ASSISTANT | 107 | 103 | $5,665 | $55 | premium | 0.2% | — |
| 99 | CAROLINA ARTHRITIS ASSOCIATES PA | WILMINGTON | SC | RHEUMATOLOGY | 5 | 103 | $1,236 | $12 | premium | 4.1% | (910) 762-1182 |
| 100 | MARYLAND ONCOLOGY HEMATOLOGY PA | LAUREL | MD | HEMATOLOGY/ONCOLOGY | 99 | 103 | $3,605 | $35 | premium | 1.7% | (301) 982-9800 |
Showing the top 100 of 203 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 →
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