	observed	calculated	calculated	calculated	calculated	calculated	reported
2023	10		fewer than 11 billers: figures not shown				0.00
2022	542	$1,287,884	-99%	32,092	23	175	0.00
2021	31,787	$237,990,198	+8870%	9,283,229	59	883	0.00
2020	1,423	$2,653,215	first year in data	158,053	68	286

Source: CMS Medicare Physician & Other Practitioners public use files (Original Medicare Part B fee-for-service). Data years 2020–2023.

By state

	observed	calculated	calculated	calculated	calculated
California	107	$381,136	8,876	25	269
New Jersey	26	$199,490	4,982	32	157
Florida	30	$116,124	3,044	30	344
New York	30	$56,320	1,377	19	204
Texas	38	$49,705	1,279	20	89
Pennsylvania	26	$35,167	896	17	157
Virginia	17	$34,636	892	22	142
Illinois	21	$34,177	853	28	105
Massachusetts	11	$26,396	595	33	183
Washington	12	$19,707	490	18	130
Arkansas	19	$18,637	527	19	65
Maryland	11	$14,707	346	18	99
Mississippi	12	$13,249	375	19	92
North Carolina	12	$9,945	265	21	35

Not listed: 33 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 2022.

Top metro areas

	observed	calculated	calculated	calculated
New York-Newark-Jersey City, NY-NJ	47	$245,383	6,098	27
Los Angeles-Long Beach-Anaheim, CA	27	$59,469	1,430	27
San Francisco-Oakland-Fremont, CA	18	$40,627	886	23
Chicago-Naperville-Elgin, IL-IN	20	$28,609	709	27
Boston-Cambridge-Newton, MA-NH	11	$25,744	580	26
Philadelphia-Camden-Wilmington, PA-NJ-DE-MD	11	$25,725	634	15
Dallas-Fort Worth-Arlington, TX	11	$19,118	483	18

Source: CMS Medicare Physician & Other Practitioners public use files (Original Medicare Part B fee-for-service). The 7 areas with the most payment among those with at least 11 billers; non-metro parts of each state are one area. Data year 2022.

Specialties billing 0001A nationally

Mass Immunizer Roster Biller accounts for 43% of payment for 0001A nationally in 2022, across 7 specialties on claims.

	observed	calculated	calculated	calculated	calculated	calculated
Mass Immunizer Roster Biller	225	42%	$547,440	43%	13,900	62
Pharmacy	146	27%	$302,308	23%	7,726	53
Internal Medicine	46	8.5%	$138,468	11%	3,288	71
Family Practice	35	6.5%	$114,680	8.9%	2,607	74
Centralized Flu	16	3.0%	$83,026	6.4%	2,080	130
Clinical Laboratory	18	3.3%	$22,305	1.7%	586	33
Nurse Practitioner	15	2.8%	$13,959	1.1%	344	23

Not listed: 12 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 2022.

Top billers of 0001A 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