Who bills the most Anesthesia for procedure on small and large bowel using an endoscope (00813) to Medicare in Colorado?
Medicare Part B FFS · CY2024 · as published by CMS49 physician groups billed Anesthesia for procedure on small and large bowel using an endoscope (00813) to Medicare fee-for-service in Colorado in 2024; the top five named groups hold 48% of that volume, and independent (non-hospital-affiliated) groups deliver 0%.
00813 — Anesthesia for procedure on small and large bowel using an endoscope · Source: CMS Medicare Physician & Other Practitioners PUF (Part B), CY2024 release. Medicare fee-for-service only.
Snapshot covers the whole Colorado market — the table below shows the top 100 groups (free tier).
Medicare fee-for-service covers 47% of Medicare in Colorado; Medicare Advantage penetration 44% → 53% since 2020.
| # | Physician group | City | St | Specialty | Providers | 00813 svcs | Share* | Phone |
|---|---|---|---|---|---|---|---|---|
| 1 | SOUTH DENVER GASTROENTEROLOGY, P.C | LONE TREE | CO | GASTROENTEROLOGY | 53 | 334 | 10.2% | (303) 788-8888 |
| 2 | US ANESTHESIA PARTNERS OF COLORADO INC | DENVER | CO | ANESTHESIOLOGY | 496 | 235 | 7.2% | (303) 438-3999 |
| 3 | CENTERS FOR GASTROENTEROLOGY | FORT COLLINS | CO | GASTROENTEROLOGY | 32 | 180 | 5.5% | (970) 207-9773 |
| 4 | CATHOLIC HEALTH INITIATIVES COLORADO | WOODLAND PARK | CO | PHYSICIAN ASSISTANT | 1266 | 150 | 4.6% | (719) 776-4780 |
| 5 | UNIVERSITY PHYSICIANS INCORPORATED | AURORA | CO | PHYSICIAN ASSISTANT | 3122 | 117 | 3.6% | (720) 777-1234 |
| 6 | DENVER DIGESTIVE HEALTH SPECIALISTS INC | DENVER | CO | GASTROENTEROLOGY | 12 | 68 | 2.1% | (303) 355-3525 |
| 7 | NCAP IMH LLC | LARAMIE | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 10 | 61 | 1.9% | (970) 224-2985 |
| 8 | GLENWOOD ANESTHESIA PROFESSIONALS, PC | GLENWOOD SPGS | CO | ANESTHESIOLOGY | 22 | 54 | 1.7% | (970) 945-7564 |
| 9 | MONTANA GASTROENTEROLOGY, PLLC | MISSOULA | CO | GASTROENTEROLOGY | 24 | 45 | 1.4% | (406) 541-6844 |
| 10 | U S ANESTHESIA PARTNERS OF TEXAS, PA | HOUSTON | CO | ANESTHESIOLOGY | 2754 | 42 | 1.3% | (713) 375-7000 |
| 11 | SUMMIT ANESTHESIA ASSOCIATES PLLC | KALISPELL | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 3 | 42 | 1.3% | 40675668874003 |
| 12 | METROPOLITAN ANESTHESIA LLC | PORTLAND | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 32 | 42 | 1.3% | (503) 297-8081 |
| 13 | PHYSICIAN ANESTHESIA SERVICES PC | WHEAT RIDGE | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 113 | 41 | 1.3% | (303) 425-8504 |
| 14 | ROCKY MOUNTAIN STATE ANESTHESIA PROVIDERS | GREELEY | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 51 | 36 | 1.1% | (970) 810-4121 |
| 15 | VALLEY ANESTHESIA PC | SALEM | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 67 | 35 | 1.1% | (540) 772-3400 |
| 16 | ANESTHESIA PHYSICIANS LTD | SIOUX FALLS | CO | ANESTHESIOLOGY | 23 | 30 | 0.9% | (605) 386-1084 |
| 17 | AMS ANESTHETIST SERVICES LLC | PENSACOLA | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 148 | 30 | 0.9% | (850) 202-4700 |
| 18 | RB ANESTHESIA LLC | COLORADO SPRINGS | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 9 | 28 | 0.9% | (719) 867-7862 |
| 19 | NORTHERN COLORADO ANESTHESIA PROFESSIONALS PLLC | LOVELAND | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 145 | 27 | 0.8% | — |
| 20 | NORMAN ANESTHESIA PROVIDERS, P.C. | NORMAN | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 34 | 27 | 0.8% | (405) 515-1000 |
| 21 | ANESTHESIA MEDICAL GROUP OF SANTA MARIA INC | SANTA MARIA | CO | ANESTHESIOLOGY | 20 | 26 | 0.8% | (805) 739-3000 |
| 22 | ARKANSAS VALLEY REGIONAL MEDICAL CENTER | LA JUNTA | CO | NURSE PRACTITIONER | 15 | 25 | 0.8% | (719) 383-5960 |
| 23 | ANESTHESIA ASSOCIATES NORTHWEST LLC | SALEM | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 94 | 25 | 0.8% | (503) 561-8170 |
| 24 | ANESTHESIACARE PC | MOBILE | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 23 | 25 | 0.8% | (251) 473-2020 |
| 25 | KINGS DAUGHTERS MEDICAL SPECIALTIES INC | ASHLAND | CO | NURSE PRACTITIONER | 392 | 23 | 0.7% | (606) 325-6888 |
| 26 | AVERA MCKENNAN | SIOUX FALLS | CO | NURSE PRACTITIONER | 964 | 23 | 0.7% | (605) 322-5180 |
| 27 | ANESTHESIA OF THE ROCKY MOUNTAINS, LLC | COLORADO SPRINGS | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 10 | 22 | 0.7% | (719) 632-7101 |
| 28 | SANTA MARIA GASTROENTEROLOGY MEDICAL GROUP INC. | SANTA MARIA | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 23 | 20 | 0.6% | (805) 922-6581 |
| 29 | NATIONAL JEWISH HEALTH | DENVER | CO | PULMONARY DISEASE | 243 | 19 | 0.6% | (303) 398-1355 |
| 30 | UNIVERSITY OF UTAH ADULT SERVICES | SALT LAKE CITY | CO | PHYSICIAN ASSISTANT | 1783 | 19 | 0.6% | (801) 581-2121 |
| 31 | ANESTHESIOLOGISTS ASSOCIATED PC | BIRMINGHAM | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 401 | 16 | 0.5% | (205) 848-2925 |
| 32 | MEDSTREAM ANESTHESIA HAWAII LLC | KAMUELA | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 24 | 15 | 0.5% | (808) 885-4444 |
| 33 | DELTA COUNTY MEMORIAL HOSPITAL | DELTA | CO | PHYSICIAN ASSISTANT | 104 | 15 | 0.5% | (970) 399-2895 |
| 34 | GALLATIN VALLEY ANESTHESIA ASSOCIATES PC | BOZEMAN | CO | ANESTHESIOLOGY | 35 | 15 | 0.5% | (406) 587-8631 |
| 35 | MONARCH ANESTHESIA LLC | SALIDA | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 7 | 15 | 0.5% | (719) 530-2200 |
| 36 | MEDSTAR MEDICAL GROUP II LLC | WASHINGTON | CO | PHYSICIAN ASSISTANT | 3707 | 15 | 0.5% | (202) 429-2401 |
| 37 | UNIVERSITY OF WISCONSIN MEDICAL FOUNDATION INC | MADISON | CO | PHYSICIAN ASSISTANT | 2523 | 14 | 0.4% | (608) 287-2050 |
| 38 | AMERICAN ANESTHESIOLOGY OF VIRGINIA PC | LEESBURG | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 511 | 13 | 0.4% | (703) 724-9950 |
| 39 | ANESTHESIA DYNAMICS LLC | LECANTO | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 845 | 13 | 0.4% | (352) 527-1825 |
| 40 | PROFESSIONAL ANESTHESIA SERVICES OF KENTUCKY PLLC | LOUISVILLE | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 317 | 13 | 0.4% | (502) 629-8000 |
| 41 | LUTHERAN HOSPITAL ASSOCIATION OF THE SAN LUIS VALLEY | ALAMOSA | CO | DIAGNOSTIC RADIOLOGY | 155 | 12 | 0.4% | (719) 589-2511 |
| 42 | POUDRE VALLEY MEDICAL GROUP LLC | COLORADO SPRINGS | CO | PHYSICIAN ASSISTANT | 2390 | 11 | 0.3% | — |
| 43 | SPECTRUM HEALTHCARE PARTNERS PA | PORTLAND | CO | DIAGNOSTIC RADIOLOGY | 281 | 11 | 0.3% | (207) 828-2160 |
| 44 | BOULDER VALLEY ANESTHESIOLOGY, PLLC | BOULDER | CO | ANESTHESIOLOGY | 61 | 11 | 0.3% | (303) 415-7000 |
| 45 | COLUMBIA LUTHERAN CHARITIES | ASTORIA | CO | NURSE PRACTITIONER | 109 | 11 | 0.3% | (503) 338-4085 |
| 46 | AERO ANESTHESIA, PLLC | SPARTA | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 4 | 11 | 0.3% | (931) 738-2164 |
| 47 | HOSPITALIST MEDICINE PHYSICIANS OF COLORADO - DENVER PC | DENVER | CO | CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA) | 71 | 11 | 0.3% | (303) 812-6400 |
| 48 | ANESTHESIA AND ANALGESIA MEDICAL GROUP INC | SANTA ROSA | CO | ANESTHESIOLOGY | 72 | 11 | 0.3% | (707) 546-3210 |
| 49 | BENEFIS HOSPITALS INC | GREAT FALLS | CO | PHYSICIAN ASSISTANT | 400 | 11 | 0.3% | (406) 455-5000 |
*Share of Colorado's disclosed Medicare-FFS services for 00813, counted once per clinician. Volume is placed in the state it was billed from, so this page ranks the groups actually billing 00813 in Colorado — including groups registered elsewhere ("City" is each 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.
How to read this. Figures are Medicare fee-for-service only — not all-payer — from the CMS Medicare Physician & Other Practitioners Public Use File (Part B), CY2024 release. CMS suppresses any provider×code row under 11 beneficiaries, so a missing group means "suppressed," never zero. "Charges" are provider-submitted amounts, not payments. Groups are ranked by measured service volume attributed to clinicians in exactly one group — clinicians affiliated with several groups are listed in rosters but never volume-attributed to a single group — a direct read of the public record, not a rating or quality score. Full method: Methods & Sources.
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 →