Who bills the most Anesthesia for extensive surgery on spine (00670) to Medicare in Colorado?

Medicare Part B FFS · CY2024 · as published by CMS

Billing groups

1,677

Named-group FFS services

$7,236,907

Named-group submitted charges

$4,315

Avg charge / service

$380

Avg allowed / service

89%

Top-5 concentration

Independent share

17 physician groups billed Anesthesia for extensive surgery on spine (00670) to Medicare fee-for-service in Colorado in 2024; the top five named groups hold 89% of that volume, and independent (non-hospital-affiliated) groups deliver 0%.

00670 — Anesthesia for extensive surgery on spine · 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).

Payer-mix context

Medicare fee-for-service covers 47% of Medicare in Colorado; Medicare Advantage penetration 44% → 53% since 2020.

Market structure — concentration, independent share, and the consolidation trend for this market — is part of the market analytics platform — built, not launched yet. Notify me at launch →

#	Physician group	City	St	Specialty	Providers	00670 svcs	Share*	Phone
1	US ANESTHESIA PARTNERS OF COLORADO INC	DENVER	CO	ANESTHESIOLOGY	496	671	32.9%	(303) 438-3999
2	CATHOLIC HEALTH INITIATIVES COLORADO	WOODLAND PARK	CO	PHYSICIAN ASSISTANT	1266	423	20.7%	(719) 776-4780
3	UNIVERSITY PHYSICIANS INCORPORATED	AURORA	CO	PHYSICIAN ASSISTANT	3122	338	16.6%	(720) 777-1234
4	ANESTHESIA PARTNERS OF ARIZONA LLC	PHOENIX	CO	ANESTHESIOLOGY	133	33	1.6%	(602) 200-9021
5	ANESTHESIA SPECIALISTS OF COLORADO	DENVER	CO	ANESTHESIOLOGY	8	32	1.6%	(720) 335-9764
6	BEND ANESTHESIOLOGY GROUP, PC	BEND	CO	ANESTHESIOLOGY	67	22	1.1%	(541) 382-4321
7	BOCA ANESTHESIA SERVICE INC	BOCA RATON	CO	ANESTHESIOLOGY ASSISTANT	68	20	1.0%	(954) 939-5000
8	KANSAS UNIVERSITY PHYSICIANS INC	KANSAS CITY	CO	NURSE PRACTITIONER	1815	18	0.9%	(913) 588-1227
9	SPARTANBURG MEDICAL CENTER	SPARTANBURG	CO	NURSE PRACTITIONER	1070	18	0.9%	(864) 587-3000
10	ANESTHESIA DYNAMICS LLC	LECANTO	CO	CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)	845	16	0.8%	(352) 527-1825
11	NORTHERN COLORADO ANESTHESIA PROFESSIONALS PLLC	LOVELAND	CO	CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)	145	14	0.7%	—
12	COMMUNITY ANESTHESIA CONSULTANTS PLLC	GRAND JUNCTION	CO	ANESTHESIOLOGY	10	13	0.6%	(970) 254-1686
13	ST ALPHONSUS PROFESSIONAL MEDICAL SERVICES LLC	BOISE	CO	CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)	126	12	0.6%	(208) 367-2152
14	ANESTHESIOLOGISTS ASSOCIATED PC	BIRMINGHAM	CO	CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)	401	12	0.6%	(205) 848-2925
15	NORTHERN ARIZONA HEALTHCARE CORPORATION	FLAGSTAFF	CO	PHYSICIAN ASSISTANT	395	12	0.6%	(928) 773-2249
16	ANESTHESIA PARTNERS OF COLORADO	EDWARDS	CO	ANESTHESIOLOGY	88	12	0.6%	(970) 569-7400
17	NORTHSTAR ANESTHESIA OF NEBRASKA LLC	SCOTTSBLUFF	CO	CERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)	21	11	0.5%	(214) 687-0001

*Share of Colorado's disclosed Medicare-FFS services for 00670, counted once per clinician. Volume is placed in the state it was billed from, so this page ranks the groups actually billing 00670 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 →

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