22600 — Fusion of spine in neck by posterior approach
2,231 observed fee-for-service (51%) · ~2,170 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 | 22600 svcs | Submitted charges | Avg charge | Medicare $ locked column | Share* | Phone |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | ABAY NEUROSCIENCE CENTER LLC | WICHITA | KS | NURSE PRACTITIONER | 16 | 101 | $381,570 | $3,778 | premium | 80.2% | (316) 609-2600 |
| 2 | UCSF MEDICAL GROUP BUSINESS SERVICES | SAN FRANCISCO | CA | DIAGNOSTIC RADIOLOGY | 1548 | 82 | $575,473 | $7,018 | premium | 19.9% | (415) 476-1000 |
| 3 | BRIGHAM AND WOMENS PHYSICIANS ORGANIZATION INC | BOSTON | MA | PHYSICIAN ASSISTANT | 2942 | 63 | $353,019 | $5,603 | premium | 35.4% | (617) 732-5500 |
| 4 | FRONT RANGE SPINE AND NEUROSURGERY | LONE TREE | CO | PHYSICIAN ASSISTANT | 12 | 46 | $211,600 | $4,600 | premium | 25.8% | (303) 790-1800 |
| 5 | UNIVERSITY PHYSICIANS INCORPORATED | AURORA | CO | PHYSICIAN ASSISTANT | 3122 | 43 | $355,830 | $8,275 | premium | 24.2% | (720) 777-1234 |
| 6 | WASHINGTON UNIVERSITY | SAINT LOUIS | MO | NURSE PRACTITIONER | 3070 | 38 | $214,852 | $5,654 | premium | 35.8% | (314) 747-3000 |
| 7 | STANFORD HEALTH CARE | STANFORD | CA | DIAGNOSTIC RADIOLOGY | 3039 | 37 | $248,748 | $6,723 | premium | 9.0% | (650) 723-4000 |
| 8 | PRISMA HEALTH MEDICAL GROUP-MIDLANDS | COLUMBIA | SC | PHYSICIAN ASSISTANT | 1017 | 37 | $145,595 | $3,935 | premium | 21.4% | (803) 749-5101 |
| 9 | GEORGETOWN PHYSICIAN ASSOCIATES, LLC | MURRELLS INLET | SC | FAMILY PRACTICE | 230 | 36 | $77,616 | $2,156 | premium | 20.8% | (843) 652-8450 |
| 10 | BAPTIST MEDICAL GROUP LLC | PENSACOLA | FL | PHYSICIAN ASSISTANT | 248 | 32 | $50,720 | $1,585 | premium | 9.2% | — |
| 11 | PREMIER BRAIN AND SPINE LLC | UNION | NJ | PHYSICIAN ASSISTANT | 127 | 30 | $89,888 | $2,996 | premium | 45.5% | (732) 906-9600 |
| 12 | MERITAS HEALTH CORPORATION | NORTH KANSAS CITY | MO | NEUROLOGY | 498 | 30 | $51,497 | $1,717 | premium | 28.3% | (816) 472-5157 |
| 13 | NEW ENGLAND MEDICAL CENTER GROUP PRACTICE INC | BOSTON | MA | PHYSICIAN ASSISTANT | 29 | 30 | $228,990 | $7,633 | premium | 16.9% | (617) 636-7399 |
| 14 | OHIOHEALTH CORPORATION | COLUMBUS | OH | PHYSICIAN ASSISTANT | 2282 | 28 | $67,914 | $2,426 | premium | 28.9% | — |
| 15 | WIREGRASS CLINIC LLC | DOTHAN | AL | NURSE PRACTITIONER | 67 | 27 | $58,320 | $2,160 | premium | 22.7% | — |
| 16 | PEACEHEALTH MEDICAL GROUP | EUGENE | OR | NURSE PRACTITIONER | 259 | 26 | $57,207 | $2,200 | premium | 68.4% | (541) 222-8700 |
| 17 | REGENTS OF THE UNIV OF CA | SACRAMENTO | CA | DIAGNOSTIC RADIOLOGY | 1608 | 25 | $118,325 | $4,733 | premium | 6.1% | (877) 827-7463 |
| 18 | CHRISTUS TRINITY CLINIC | TYLER | TX | NURSE PRACTITIONER | 1495 | 25 | $64,845 | $2,594 | premium | 11.5% | (903) 606-5560 |
| 19 | DUKE HEALTH INTEGRATED PRACTICE INC | DURHAM | NC | PHYSICIAN ASSISTANT | 3051 | 24 | $76,851 | $3,202 | premium | 11.1% | (919) 684-8111 |
| 20 | MAYO CLINIC | ROCHESTER | MN | NURSE PRACTITIONER | 4896 | 24 | $195,115 | $8,130 | premium | 55.8% | (507) 284-2511 |
| 21 | LEXINGTON HEALTH INC | WEST COLUMBIA | SC | NURSE PRACTITIONER | 909 | 23 | $15,508 | $674 | premium | 13.3% | (803) 744-4900 |
| 22 | NEUROSURGICAL ASSOCIATES LTD | PHOENIX | AZ | NEUROSURGERY | 74 | 22 | $114,950 | $5,225 | premium | 36.7% | (602) 406-3181 |
| 23 | FAIRBANKS PARTNERS LLC | CELEBRATION | FL | NEUROSURGERY | 36 | 22 | $26,862 | $1,221 | premium | 6.3% | (407) 975-0200 |
| 24 | ORTHOPAEDIC SPECIALTY INSTITUTE MEDICAL GROUP OF ORANGE COUNTY | ORANGE | CA | PHYSICIAN ASSISTANT | 58 | 22 | $48,708 | $2,214 | premium | 5.3% | (714) 634-4567 |
| 25 | TENET FLORIDA PHYSICIAN SERVICES II, LLC | MANGONIA PARK | FL | PHYSICIAN ASSISTANT | 101 | 22 | $322,501 | $14,659 | premium | 6.3% | (561) 844-6300 |
| 26 | JEFFERSON UNIVERSITY PHYSICIANS | PHILADELPHIA | PA | DIAGNOSTIC RADIOLOGY | 1570 | 21 | $69,300 | $3,300 | premium | 11.5% | — |
| 27 | WEILL MEDICAL COLLEGE OF CORNELL | NEW YORK | NY | INTERNAL MEDICINE | 2053 | 21 | $50,413 | $2,401 | premium | 15.0% | (212) 746-5454 |
| 28 | ICAHN SCHOOL OF MEDICINE AT MOUNT SINAI | NEW YORK | NY | PHYSICIAN ASSISTANT | 2818 | 21 | $427,174 | $20,342 | premium | 15.0% | (212) 241-4812 |
| 29 | METHODIST PHYSICIAN PRACTICES PLLC | SAN ANTONIO | TX | INTERVENTIONAL CARDIOLOGY | 169 | 20 | $72,935 | $3,647 | premium | 9.2% | (210) 575-8289 |
| 30 | UMASS MEMORIAL MEDICAL GROUP INC | WORCESTER | MA | PHYSICIAN ASSISTANT | 2483 | 19 | $108,072 | $5,688 | premium | 10.7% | (508) 334-1000 |
| 31 | DELAWARE NEUROSURGICAL GROUP, PA | NEWARK | DE | PHYSICIAN ASSISTANT | 24 | 19 | $64,638 | $3,402 | premium | 36.5% | (302) 366-7671 |
| 32 | CHS PHYSICIAN PARTNERS PC | ROSLYN | NY | PHYSICIAN ASSISTANT | 734 | 18 | $87,786 | $4,877 | premium | 12.9% | — |
| 33 | THE MEDICAL COLLEGE OF WISCONSIN INC | MILWAUKEE | WI | DIAGNOSTIC RADIOLOGY | 2137 | 18 | $407,799 | $22,656 | premium | 52.9% | (414) 955-4263 |
| 34 | SCRIPPS HEALTH | LA JOLLA | CA | PHYSICIAN ASSISTANT | 1431 | 17 | $81,463 | $4,792 | premium | 4.1% | (858) 455-9100 |
| 35 | UNIVERSITY MEDICAL ASSOCIATES OF THE MEDICAL UNIVERSITY OF SOUTH CAROL | CHARLESTON | SC | PHYSICIAN ASSISTANT | 1692 | 17 | $168,444 | $9,908 | premium | 9.8% | (843) 792-1414 |
| 36 | COLORADO SPRINGS ORTHOPAEDIC GROUP | COLORADO SPRINGS | CO | PHYSICIAN ASSISTANT | 75 | 17 | $105,516 | $6,207 | premium | 9.6% | (719) 632-7669 |
| 37 | MERCY CLINIC OKLAHOMA COMMUNITIES | OKLAHOMA CITY | OK | PHYSICIAN ASSISTANT | 642 | 17 | $44,132 | $2,596 | premium | 24.6% | (405) 254-9690 |
| 38 | ENLOE MEDICAL CENTER | CHICO | CA | DIAGNOSTIC RADIOLOGY | 362 | 16 | $30,702 | $1,919 | premium | 3.9% | (530) 332-4470 |
| 39 | POUDRE VALLEY MEDICAL GROUP LLC | COLORADO SPRINGS | WI | PHYSICIAN ASSISTANT | 2390 | 16 | $47,456 | $2,966 | premium | 47.1% | — |
| 40 | UNIVERSITY MEDICAL ASSOCIATES OF THE MEDICAL UNIVERSITY OF SOUTH CAROL | CHARLESTON | AZ | PHYSICIAN ASSISTANT | 1692 | 16 | $151,158 | $9,447 | premium | 26.7% | (843) 792-1414 |
| 41 | SAINT THOMAS MEDICAL PARTNERS | NASHVILLE | TN | NURSE PRACTITIONER | 591 | 16 | $44,416 | $2,776 | premium | 12.4% | (615) 269-4545 |
| 42 | HEALTH CARE AUTHORITY FOR BAPTIST HEALTH, AN AFFILIATE OF UABHS | MONTGOMERY | AL | NURSE PRACTITIONER | 259 | 15 | $36,705 | $2,447 | premium | 12.6% | (334) 747-8970 |
| 43 | NEUROSURGICAL ASSOCIATES | NASHVILLE | TN | PHYSICIAN ASSISTANT | 28 | 15 | $53,400 | $3,560 | premium | 11.6% | 6153200007118 |
| 44 | DIGNITY HEALTH MEDICAL FOUNDATION | FOLSOM | CA | DIAGNOSTIC RADIOLOGY | 1197 | 15 | $116,130 | $7,742 | premium | 3.6% | (916) 983-7476 |
| 45 | PREMIER HEALTH SPECIALISTS INC | DAYTON | IN | PHYSICIAN ASSISTANT | 574 | 15 | $43,755 | $2,917 | premium | 39.5% | — |
| 46 | NEUROLOGICAL SURGERY INC | TULSA | OK | PHYSICIAN ASSISTANT | 11 | 15 | $18,071 | $1,205 | premium | 21.7% | (918) 492-7587 |
| 47 | PROMEDICA CENTRAL PHYSICIANS | TOLEDO | OH | PHYSICIAN ASSISTANT | 794 | 15 | $39,360 | $2,624 | premium | 15.5% | (419) 291-2003 |
| 48 | ENDEAVOR HEALTH MEDICAL GROUP | EVANSTON | IL | NURSE PRACTITIONER | 3380 | 15 | $122,700 | $8,180 | premium | 30.6% | — |
| 49 | HOLY CROSS HOSPITAL INC | FT LAUDERDALE | FL | PHYSICIAN ASSISTANT | 303 | 15 | $73,023 | $4,868 | premium | 4.3% | (954) 772-2136 |
| 50 | PORTERCARE ADVENTIST HEALTH SYSTEM | DENVER | CO | PHYSICIAN ASSISTANT | 748 | 15 | $53,475 | $3,565 | premium | 8.4% | (303) 778-5797 |
| 51 | USA HEALTH PHYSICIAN BILLING SERVICES LLC | MOBILE | AL | NURSE PRACTITIONER | 353 | 14 | $47,771 | $3,412 | premium | 11.8% | (251) 471-7000 |
| 52 | MAUI HEALTH SYSTEM A KAISER FOUNDATION HOSPITALS LLC | WAILUKU | HI | GASTROENTEROLOGY | 53 | 14 | $44,377 | $3,170 | premium | 51.9% | (808) 244-9056 |
| 53 | TRUSTEES OF COLUMBIA UNIVERSITY IN THE CITY OF NEW YORK | NEW YORK | NY | NURSE PRACTITIONER | 2273 | 14 | $392,420 | $28,030 | premium | 10.0% | (212) 305-8559 |
| 54 | UNITED HOSPITAL CENTER INC | BRIDGEPORT | WV | PHYSICIAN ASSISTANT | 298 | 14 | $52,430 | $3,745 | premium | 56.0% | (681) 342-1842 |
| 55 | UNIVERSITY OF VERMONT MEDICAL CENTER INC | BURLINGTON | VT | PHYSICIAN ASSISTANT | 1194 | 14 | $78,304 | $5,593 | premium | 100.0% | (802) 847-0000 |
| 56 | UNIVERSITY OF ALABAMA HEALTH SERVICES FOUNDATION, PC | BIRMINGHAM | AL | NURSE PRACTITIONER | 2788 | 14 | $79,646 | $5,689 | premium | 11.8% | (205) 934-3460 |
| 57 | CLEVELAND CLINIC | CLEVELAND | AL | PHYSICIAN ASSISTANT | 6828 | 14 | $79,170 | $5,655 | premium | 11.8% | — |
| 58 | SPORTS AND ORTHOPEDIC REHABILITATION SERVICES INC | NEW PORT RICHEY | FL | ORTHOPEDIC SURGERY | 306 | 14 | $78,596 | $5,614 | premium | 4.0% | (727) 841-0515 |
| 59 | HACKENSACK MERIDIAN HEALTH MEDICAL GROUP - SPECIALTY CARE PC | NEPTUNE | NJ | NURSE PRACTITIONER | 1878 | 13 | $55,965 | $4,305 | premium | 19.7% | (732) 362-3663 |
| 60 | B BARRY CHEHRAZI MD INC | ROSEVILLE | CA | NEUROSURGERY | 3 | 13 | $106,025 | $8,156 | premium | 3.2% | (916) 773-8700 |
| 61 | KANSAS UNIVERSITY PHYSICIANS INC | KANSAS CITY | KS | NURSE PRACTITIONER | 1815 | 13 | $39,219 | $3,017 | premium | 10.3% | (913) 588-1227 |
| 62 | JOHNS HOPKINS UNIVERSITY | BALTIMORE | MD | NURSE PRACTITIONER | 2900 | 13 | $87,323 | $6,717 | premium | 4.9% | (410) 502-4340 |
| 63 | DUKE HEALTH INTEGRATED PRACTICE INC | DURHAM | AR | PHYSICIAN ASSISTANT | 3051 | 13 | $78,052 | $6,004 | premium | 31.7% | (919) 684-8111 |
| 64 | MERITUS MEDICAL CENTER INC | HAGERSTOWN | MD | NURSE PRACTITIONER | 725 | 13 | $90,816 | $6,986 | premium | 4.9% | — |
| 65 | ST. DAVID'S ORTHO NEURO AND REHAB PLLC | AUSTIN | TX | PHYSICIAN ASSISTANT | 61 | 13 | $52,174 | $4,013 | premium | 6.0% | (512) 816-8611 |
| 66 | LEHIGH VALLEY PHYSICIAN GROUP | ALLENTOWN | PA | PHYSICIAN ASSISTANT | 2389 | 13 | $53,114 | $4,086 | premium | 7.1% | — |
| 67 | QUEENS UNIVERSITY MEDICAL GROUP | HONOLULU | HI | DIAGNOSTIC RADIOLOGY | 648 | 13 | $21,372 | $1,644 | premium | 48.1% | (808) 691-8200 |
| 68 | INOVA HEALTH CARE SERVICES | FALLS CHURCH | VA | NURSE PRACTITIONER | 1818 | 13 | $47,632 | $3,664 | premium | 11.7% | — |
| 69 | ALABAMA NEUROLOGICAL SURGERY AND SPINE PC | BIRMINGHAM | AL | NEUROSURGERY | 5 | 13 | $23,088 | $1,776 | premium | 10.9% | (205) 250-6805 |
| 70 | LONG ISLAND NEUROSURGICAL ASSOCIATES PC | NEW HYDE PARK | NY | NEUROSURGERY | 6 | 13 | $32,500 | $2,500 | premium | 9.3% | (516) 354-3401 |
| 71 | VALLEY PHYSICIAN ENTERPRISE INC | WINCHESTER | VA | PHYSICIAN ASSISTANT | 229 | 12 | $43,032 | $3,586 | premium | 10.8% | (540) 536-8000 |
| 72 | MEDHEALTH | DALLAS | TX | PHYSICIAN ASSISTANT | 430 | 12 | $38,268 | $3,189 | premium | 5.5% | (214) 599-8624 |
| 73 | LYERLY BAPTIST INC | JACKSONVILLE | FL | NURSE PRACTITIONER | 68 | 12 | $15,197 | $1,266 | premium | 3.5% | (904) 388-6518 |
| 74 | SUTTER VALLEY MEDICAL FOUNDATION | SACRAMENTO | CA | DIAGNOSTIC RADIOLOGY | 2420 | 12 | $65,240 | $5,437 | premium | 2.9% | (916) 681-8852 |
| 75 | PACIFIC CENTRAL COAST HEALTH CENTERS | SANTA MARIA | CA | PHYSICIAN ASSISTANT | 249 | 12 | $34,910 | $2,909 | premium | 2.9% | (805) 349-8514 |
| 76 | SENTARA MEDICAL GROUP | NORFOLK | NY | PHYSICIAN ASSISTANT | 1404 | 12 | $30,040 | $2,503 | premium | 8.6% | — |
| 77 | CATHOLIC HEALTH INITIATIVES COLORADO | WOODLAND PARK | CO | PHYSICIAN ASSISTANT | 1266 | 12 | $24,543 | $2,045 | premium | 6.7% | (719) 776-4780 |
| 78 | NEUROMEDICAL CENTER | BATON ROUGE | LA | PHYSICIAN ASSISTANT | 108 | 12 | $84,452 | $7,038 | premium | 100.0% | 22576922002164 |
| 79 | BILLINGS CLINIC | BILLINGS | MT | PHYSICIAN ASSISTANT | 811 | 12 | $68,793 | $5,733 | premium | 52.2% | (406) 657-4000 |
| 80 | RUSH UNIVERSITY MEDICAL GROUP | CHICAGO | IL | PHYSICIAN ASSISTANT | 1496 | 12 | $57,420 | $4,785 | premium | 24.5% | (312) 563-2875 |
| 81 | ROPER SAINT FRANCIS PHYSICIANS NETWORK | CHARLESTON | SC | PHYSICIAN ASSISTANT | 539 | 12 | $43,752 | $3,646 | premium | 6.9% | (843) 720-8448 |
| 82 | RIVERSIDE PHYSICIAN SERVICES INC | NEWPORT NEWS | VA | PHYSICIAN ASSISTANT | 793 | 12 | $29,448 | $2,454 | premium | 10.8% | — |
| 83 | TALLAHASSEE ORTHOPEDIC CLINIC III PL | TALLAHASSEE | FL | PHYSICIAN ASSISTANT | 542 | 12 | $83,760 | $6,980 | premium | 3.5% | (850) 877-8174 |
| 84 | ELITE ORTHOPAEDICS OF IRVING PLLC | DENTON | TX | PHYSICIAN ASSISTANT | 55 | 12 | $46,752 | $3,896 | premium | 5.5% | (940) 384-3535 |
| 85 | UNIVERSITY OF VERMONT MEDICAL CENTER INC | BURLINGTON | MA | PHYSICIAN ASSISTANT | 1194 | 12 | $69,168 | $5,764 | premium | 6.7% | (802) 847-0000 |
| 86 | MERCY HEALTH PHYSICIANS YOUNGSTOWN SPECIALTY CARE LLC | YOUNGSTOWN | OH | NURSE PRACTITIONER | 476 | 12 | $25,476 | $2,123 | premium | 12.4% | (330) 480-3655 |
| 87 | UTMB FACULTY GROUP PRACTICE | GALVESTON | WA | NURSE PRACTITIONER | 1068 | 12 | $42,684 | $3,557 | premium | 52.2% | (409) 772-2222 |
| 88 | COOPER SURGICAL ASSOCIATES, PA | CAMDEN | NJ | PHYSICIAN ASSISTANT | 303 | 12 | $80,952 | $6,746 | premium | 18.2% | (856) 270-4100 |
| 89 | ST. JOHN PHYSICIANS, INC. | TULSA | OK | NURSE PRACTITIONER | 263 | 12 | $31,944 | $2,662 | premium | 17.4% | — |
| 90 | LAHEY CLINIC INC | BURLINGTON | MA | NURSE PRACTITIONER | 1400 | 12 | $64,272 | $5,356 | premium | 6.7% | — |
| 91 | IDAHO PHYSICIAN SERVICES INC | IDAHO FALLS | ID | PHYSICIAN ASSISTANT | 18 | 12 | $46,620 | $3,885 | premium | 100.0% | (208) 528-1000 |
| 92 | REGENTS OF THE UNIVERSITY OF CALIFORNIA | SANTA MONICA | CA | ORTHOPEDIC SURGERY | 67 | 12 | $102,360 | $8,530 | premium | 2.9% | (310) 319-1234 |
| 93 | NEW YORK UNIVERSITY | NEW YORK | NY | DIAGNOSTIC RADIOLOGY | 5704 | 12 | $291,828 | $24,319 | premium | 8.6% | (212) 263-9700 |
| 94 | SETON FAMILY OF DOCTORS | AUSTIN | TX | PHYSICIAN ASSISTANT | 804 | 12 | $46,942 | $3,912 | premium | 5.5% | (512) 324-7300 |
| 95 | FORT WORTH BRAIN AND SPINE INSTITUTE, LLP | FORT WORTH | TX | NEUROSURGERY | 11 | 12 | $34,704 | $2,892 | premium | 5.5% | (817) 878-5333 |
| 96 | UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL | CHAPEL HILL | NC | NURSE PRACTITIONER | 2120 | 12 | $50,565 | $4,214 | premium | 5.6% | (984) 215-5556 |
| 97 | CEDARS-SINAI MEDICAL CENTER | WEST HOLLYWOOD | CA | NURSE PRACTITIONER | 802 | 12 | $95,209 | $7,934 | premium | 2.9% | (310) 423-3277 |
| 98 | SALINA REGIONAL HEALTH CENTER INC | SALINA | KS | NURSE PRACTITIONER | 160 | 12 | $22,777 | $1,898 | premium | 9.5% | — |
| 99 | IU HEALTH MEDICAL GROUP, LLC | INDIANAPOLIS | IN | NURSE PRACTITIONER | 4250 | 11 | $10,931 | $994 | premium | 28.9% | (888) 484-3258 |
| 100 | PROVIDENCE MEDICAL FOUNDATION | FULLERTON | CA | PHYSICIAN ASSISTANT | 1455 | 11 | $46,244 | $4,204 | premium | 2.7% | (714) 871-3006 |
Showing the top 100 of 123 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 →