	observed	calculated	calculated	calculated	calculated
California	2,248	$39,895,737	280,491	67	421
Idaho	136	$33,239,691	232,590	66	8,931
Florida	1,794	$31,485,807	222,490	78	362
New York	1,540	$25,439,409	180,201	68	400
Colorado	476	$24,620,842	182,830	82	261
Pennsylvania	1,696	$23,016,109	161,684	64	283
Texas	1,991	$21,865,389	155,356	53	215
Massachusetts	652	$19,006,109	134,560	147	602
Illinois	848	$17,458,038	125,801	106	385
Ohio	1,282	$16,618,569	116,919	71	235
Virginia	912	$15,491,850	109,130	84	337
North Carolina	1,213	$13,727,808	97,388	50	239
Michigan	996	$13,326,729	94,533	68	274
Wisconsin	752	$13,167,794	94,440	66	420
New Jersey	781	$13,128,916	92,803	77	393

Not listed: 2 billers with an armed-forces or unknown state code (AE); 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 2023.

Top metro areas

	observed	calculated	calculated	calculated
Boise City, ID	49	$31,978,680	223,639	47
New York-Newark-Jersey City, NY-NJ	1,321	$24,862,715	176,507	76
Denver-Aurora-Centennial, CO	221	$20,446,256	153,225	74
Boston-Cambridge-Newton, MA-NH	449	$12,863,881	91,088	142
Philadelphia-Camden-Wilmington, PA-NJ-DE-MD	731	$12,533,322	88,483	86
Los Angeles-Long Beach-Anaheim, CA	703	$11,260,745	79,033	59
Chicago-Naperville-Elgin, IL-IN	520	$10,936,777	79,464	95
Washington-Arlington-Alexandria, DC-VA-MD-WV	604	$10,570,870	74,234	73
Miami-Fort Lauderdale-West Palm Beach, FL	433	$6,739,167	47,563	55
Dallas-Fort Worth-Arlington, TX	550	$6,022,358	42,990	57
Atlanta-Sandy Springs-Roswell, GA	535	$5,654,241	39,675	57
San Francisco-Oakland-Fremont, CA	219	$5,560,430	39,159	95
Baltimore-Columbia-Towson, MD	291	$5,329,258	37,637	89
Minneapolis-St. Paul-Bloomington, MN-WI	436	$5,222,557	37,244	24
Detroit-Warren-Dearborn, MI	432	$4,982,623	35,257	63

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 2023.

Specialties billing 91322 nationally

Mass Immunizer Roster Biller accounts for 61% of payment for 91322 nationally in 2023, across 19 specialties on claims.

	observed	calculated	calculated	calculated	calculated	calculated
Mass Immunizer Roster Biller	19,008	65%	$301,989,298	61%	2,114,785	111
Centralized Flu	4,536	15%	$147,271,745	30%	1,072,026	236
Pharmacy	1,502	5.1%	$18,350,301	3.7%	128,899	86
Family Practice	1,756	6.0%	$8,428,986	1.7%	60,021	34
Internal Medicine	1,145	3.9%	$6,207,962	1.3%	44,008	38
Nurse Practitioner	736	2.5%	$2,435,767	0.49%	17,319	24
Clinical Laboratory	125	0.43%	$1,614,361	0.33%	11,363	91
Pediatric Medicine	30	0.10%	$1,469,442	0.30%	10,399	347
Public Health or Welfare Agency	119	0.41%	$1,365,212	0.28%	10,185	86
Physician Assistant	168	0.57%	$507,111	0.10%	3,590	21
General Practice	23	0.08%	$257,937	0.05%	1,851	80
Infectious Disease	11	0.04%	$254,261	0.05%	1,799	164
All Other Suppliers	17	0.06%	$250,107	0.05%	1,749	103
Preventive Medicine	21	0.07%	$194,680	0.04%	1,404	67
Emergency Medicine	32	0.11%	$161,103	0.03%	1,153	36

Not listed: 21 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 91322 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