	observed	calculated	calculated	calculated	calculated
California	2,899	$58,978,068	407,496	70	499
Idaho	179	$55,770,848	378,714	55	1,588
Florida	2,443	$43,529,572	297,797	71	315
New York	1,636	$31,478,494	212,635	54	510
Texas	2,438	$30,796,091	208,729	59	234
Pennsylvania	2,155	$28,802,424	194,384	46	321
Massachusetts	1,123	$26,535,319	180,062	49	671
Colorado	818	$26,241,909	178,188	50	301
Illinois	1,334	$24,608,270	166,885	69	381
Virginia	1,222	$23,545,721	159,486	81	414
Ohio	1,328	$20,880,008	140,519	71	310
New Jersey	949	$17,880,591	120,466	64	453
North Carolina	1,323	$17,514,864	118,145	56	283
Maryland	946	$16,732,157	113,662	64	390
Indiana	943	$14,466,773	97,258	63	312

Not listed: 3 billers with an armed-forces or unknown state code (AE, AP); they are in the national totals.

Not listed: 2 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
Boise City, ID	92	$54,328,781	368,746	47
New York-Newark-Jersey City, NY-NJ	1,534	$34,414,450	232,731	67
Denver-Aurora-Centennial, CO	368	$19,913,470	135,029	50
Boston-Cambridge-Newton, MA-NH	892	$18,482,706	125,567	42
Chicago-Naperville-Elgin, IL-IN	898	$18,188,389	123,502	74
Los Angeles-Long Beach-Anaheim, CA	991	$16,826,173	116,868	64
Philadelphia-Camden-Wilmington, PA-NJ-DE-MD	786	$15,418,611	103,935	66
Washington-Arlington-Alexandria, DC-VA-MD-WV	826	$14,351,291	97,891	67
San Francisco-Oakland-Fremont, CA	371	$10,560,365	73,024	99
Miami-Fort Lauderdale-West Palm Beach, FL	560	$8,814,308	59,971	61
Orlando-Kissimmee-Sanford, FL	300	$8,799,314	61,763	54
Baltimore-Columbia-Towson, MD	498	$8,550,224	58,021	61
Minneapolis-St. Paul-Bloomington, MN-WI	781	$7,790,463	54,386	27
Dallas-Fort Worth-Arlington, TX	614	$7,594,946	51,231	66
Phoenix-Mesa-Chandler, AZ	416	$7,545,070	51,605	74

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 91320 nationally

Mass Immunizer Roster Biller accounts for 53% of payment for 91320 nationally in 2024, across 21 specialties on claims.

	observed	calculated	calculated	calculated	calculated	calculated
Mass Immunizer Roster Biller	17,153	47%	$351,408,656	53%	2,377,966	139
Centralized Flu	7,768	21%	$237,017,681	36%	1,605,367	207
Internal Medicine	3,425	9.3%	$22,058,441	3.3%	154,073	45
Family Practice	4,445	12%	$21,488,589	3.2%	150,068	34
Pharmacy	1,069	2.9%	$16,879,991	2.5%	115,133	108
Nurse Practitioner	1,928	5.2%	$7,092,972	1.1%	49,869	26
Physician Assistant	508	1.4%	$1,591,129	0.24%	11,151	22
Public Health or Welfare Agency	62	0.17%	$1,571,601	0.24%	11,283	182
Infectious Disease	31	0.08%	$773,349	0.12%	5,355	173
Geriatric Medicine	82	0.22%	$613,397	0.09%	4,305	53
Pediatric Medicine	55	0.15%	$430,230	0.06%	3,017	55
Hospitalist	34	0.09%	$358,248	0.05%	2,515	74
Clinical Laboratory	38	0.10%	$344,748	0.05%	2,362	62
Emergency Medicine	27	0.07%	$340,736	0.05%	2,426	90
All Other Suppliers	17	0.05%	$284,175	0.04%	1,915	113

Not listed: 24 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 91320 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