	observed	calculated	calculated	calculated	calculated	calculated	reported
2024	16,464	$456,555,338	+7%	1,528,359	56	273	4.57
2023	16,310	$426,638,634	+12%	1,487,316	55	269	4.57
2022	15,913	$381,492,875	+5%	1,406,150	53	262	4.57
2021	15,699	$365,003,434	+25%	1,341,942	50	254	4.57
2020	14,759	$291,403,814	first year in data	1,088,627	44	219	4.57

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	1,436	$53,707,046	150,760	63	329
Florida	1,145	$36,416,177	118,690	56	382
Texas	1,148	$31,829,615	107,081	54	257
Pennsylvania	856	$22,527,534	76,182	54	254
New York	1,104	$22,198,580	67,499	37	170
North Carolina	558	$19,264,069	64,226	70	324
Ohio	683	$16,056,254	57,094	54	259
New Jersey	573	$16,014,156	46,856	49	246
Illinois	668	$15,741,485	57,673	56	224
Maryland	370	$14,119,907	43,011	72	392
Georgia	461	$12,901,009	42,309	57	303
Washington	387	$12,113,407	38,836	63	294
Massachusetts	477	$11,708,553	43,639	64	238
South Carolina	264	$10,573,722	37,080	87	451
Arizona	330	$10,263,304	33,231	54	328

Not listed: 2 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 2024.

Top metro areas

	observed	calculated	calculated	calculated
New York-Newark-Jersey City, NY-NJ	1,185	$27,893,841	79,624	38
Los Angeles-Long Beach-Anaheim, CA	487	$13,807,566	40,902	53
Philadelphia-Camden-Wilmington, PA-NJ-DE-MD	447	$12,980,247	40,542	52
Chicago-Naperville-Elgin, IL-IN	514	$11,062,940	41,831	54
Dallas-Fort Worth-Arlington, TX	358	$10,265,315	32,257	50
Washington-Arlington-Alexandria, DC-VA-MD-WV	311	$9,936,939	30,348	59
Boston-Cambridge-Newton, MA-NH	358	$9,115,285	32,851	63
Phoenix-Mesa-Chandler, AZ	256	$8,092,185	24,980	51
San Francisco-Oakland-Fremont, CA	177	$7,747,153	18,527	68
Atlanta-Sandy Springs-Roswell, GA	276	$7,732,881	23,956	51
Miami-Fort Lauderdale-West Palm Beach, FL	294	$7,615,037	23,640	42
Baltimore-Columbia-Towson, MD	182	$6,639,967	20,495	63
Seattle-Tacoma-Bellevue, WA	222	$5,324,099	17,063	49
Houston-Pasadena-The Woodlands, TX	290	$5,183,128	17,864	40
San Jose-Sunnyvale-Santa Clara, CA	114	$5,105,322	11,842	43

Source: CMS Medicare Physician & Other Practitioners public use files (Original Medicare Part B fee-for-service). The 100 areas with the most payment among those with at least 11 billers; non-metro parts of each state are one area. Data year 2024.

Specialties billing 45385 nationally

Ambulatory Surgical Center accounts for 55% of payment for 45385 nationally in 2024, across 7 specialties on claims.

	observed	calculated	calculated	calculated	calculated	calculated
Ambulatory Surgical Center	1,787	11%	$250,524,624	55%	509,054	285
Gastroenterology	11,543	70%	$180,810,857	40%	891,610	77
Internal Medicine	772	4.7%	$10,331,468	2.3%	50,631	66
General Surgery	1,550	9.4%	$9,134,841	2.0%	47,795	31
Colorectal Surgery (Proctology)	615	3.7%	$4,302,539	0.94%	22,071	36
Family Practice	120	0.73%	$671,144	0.15%	3,398	28
Hospitalist	24	0.15%	$288,905	0.06%	1,400	58

Not listed: 19 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 2024.

Top billers of 45385 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