	observed	calculated	calculated	calculated	calculated	calculated	reported
2024	8,154	$47,700,328	-4%	237,385	20	76	3.26
2023	8,675	$49,874,389	-4%	258,797	20	79	3.26
2022	9,419	$51,965,549	-10%	293,487	21	83	3.26
2021	10,135	$57,844,508	+8%	324,365	22	86	3.26
2020	9,788	$53,702,661	first year in data	307,810	22	83	3.26

Source: CMS Medicare Physician & Other Practitioners public use files (Original Medicare Part B fee-for-service). Data years 2020–2024.

By state

	observed	calculated	calculated	calculated	calculated
California	802	$6,039,363	27,546	23	99
New York	689	$5,705,468	24,761	23	106
Florida	669	$4,355,030	21,728	21	93
Texas	518	$2,805,244	14,842	20	72
New Jersey	336	$2,253,949	10,521	22	84
Maryland	219	$1,798,091	8,630	27	95
Pennsylvania	391	$1,790,131	9,564	19	62
Illinois	343	$1,734,968	9,737	20	74
Georgia	284	$1,585,992	8,426	20	77
Ohio	342	$1,522,296	8,791	19	61
North Carolina	280	$1,488,560	7,848	20	68
Tennessee	233	$1,323,671	7,692	22	86
South Carolina	198	$1,280,182	6,973	22	104
Arizona	173	$1,099,497	5,269	22	86
Massachusetts	209	$980,919	5,967	22	68

Not listed: 1 billers with an armed-forces or unknown state code (ZZ); they are in the national totals.

Not listed: 3 states with fewer than 11 billers (small cells).

Source: CMS Medicare Physician & Other Practitioners public use files (Original Medicare Part B fee-for-service). Providers placed by practice address. Data year 2023.

Top metro areas

	observed	calculated	calculated	calculated
New York-Newark-Jersey City, NY-NJ	773	$6,526,907	27,802	23
Los Angeles-Long Beach-Anaheim, CA	261	$2,138,122	9,662	24
Washington-Arlington-Alexandria, DC-VA-MD-WV	149	$1,073,021	4,763	21
Chicago-Naperville-Elgin, IL-IN	247	$1,064,679	6,202	19
Philadelphia-Camden-Wilmington, PA-NJ-DE-MD	212	$1,021,314	5,091	18
Baltimore-Columbia-Towson, MD	114	$1,004,412	4,961	29
Miami-Fort Lauderdale-West Palm Beach, FL	133	$826,350	3,900	19
Phoenix-Mesa-Chandler, AZ	116	$770,126	3,435	21
Atlanta-Sandy Springs-Roswell, GA	146	$714,156	3,598	17
San Francisco-Oakland-Fremont, CA	92	$622,264	2,508	22
Dallas-Fort Worth-Arlington, TX	107	$614,755	2,850	18
Las Vegas-Henderson-North Las Vegas, NV	53	$596,257	2,565	31
Boston-Cambridge-Newton, MA-NH	143	$550,423	3,410	18
Detroit-Warren-Dearborn, MI	113	$523,412	2,903	19
Houston-Pasadena-The Woodlands, TX	99	$490,624	2,559	19

Source: CMS Medicare Physician & Other Practitioners public use files (Original Medicare Part B fee-for-service). The 96 areas with the most payment among those with at least 11 billers; non-metro parts of each state are one area. Data year 2023.

Specialties billing 45378 nationally

Ambulatory Surgical Center accounts for 48% of payment for 45378 nationally in 2023, across 6 specialties on claims.

	observed	calculated	calculated	calculated	calculated	calculated
Ambulatory Surgical Center	1,367	16%	$24,115,643	48%	73,844	54
Gastroenterology	5,831	67%	$21,264,737	43%	151,697	26
General Surgery	813	9.4%	$2,244,548	4.5%	17,434	21
Internal Medicine	358	4.1%	$1,314,434	2.6%	9,217	26
Colorectal Surgery (Proctology)	245	2.8%	$766,270	1.5%	5,366	22
Family Practice	18	0.21%	$37,611	0.08%	303	17

Not listed: 15 specialties with fewer than 11 billers (small cells).

Source: CMS Medicare Physician & Other Practitioners public use files (Original Medicare Part B fee-for-service). Provider-level lines (fewer than 11 beneficiaries suppressed by CMS); specialty is the provider type on claims. Data year 2023.

Top billers of 45378 nationally

Named top billers are a Pro figure, and Pro is not available to buy, so this list is not shown to any account. The counts and totals by state, metro area and specialty on this page are free.

Original Medicare Part B fee-for-service only; CMS suppresses provider lines with fewer than 11 beneficiaries. How these figures are computed · Limitations