	observed	calculated	calculated	calculated	calculated
Idaho	47	$1,700,657	41,366	27	4,959
California	1,052	$1,557,005	36,091	19	91
New York	601	$1,223,513	27,726	19	96
Illinois	552	$1,098,734	27,681	19	120
Pennsylvania	556	$956,816	24,359	19	164
Texas	548	$755,330	19,303	17	97
Colorado	97	$733,299	18,241	19	90
Florida	655	$725,509	18,671	17	66
Massachusetts	355	$699,327	16,011	23	126
North Carolina	474	$633,537	16,973	18	109
Virginia	370	$629,211	15,602	19	128
New Jersey	394	$613,461	14,169	20	82
Maryland	310	$543,042	12,872	21	166
Ohio	434	$488,755	13,075	17	82
Washington	236	$457,354	11,645	19	173

Not listed: 4 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
Boise City, ID	14	$1,654,369	40,079	1,396
New York-Newark-Jersey City, NY-NJ	725	$1,475,858	32,931	20
Chicago-Naperville-Elgin, IL-IN	316	$774,086	19,095	18
Denver-Aurora-Centennial, CO	37	$661,981	16,473	17
Philadelphia-Camden-Wilmington, PA-NJ-DE-MD	323	$623,412	15,120	19
Los Angeles-Long Beach-Anaheim, CA	352	$532,794	12,269	19
Boston-Cambridge-Newton, MA-NH	276	$522,844	12,041	21
Washington-Arlington-Alexandria, DC-VA-MD-WV	231	$410,628	9,500	20
Dallas-Fort Worth-Arlington, TX	195	$286,171	7,228	16
Baltimore-Columbia-Towson, MD	162	$263,829	6,285	23
Seattle-Tacoma-Bellevue, WA	130	$244,856	6,218	16
San Francisco-Oakland-Fremont, CA	148	$229,610	5,063	17
Atlanta-Sandy Springs-Roswell, GA	150	$215,360	5,521	16
Phoenix-Mesa-Chandler, AZ	173	$184,982	5,007	20
Kansas City, MO-KS	132	$174,107	4,643	19

Source: CMS Medicare Physician & Other Practitioners public use files (Original Medicare Part B fee-for-service). The 93 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 0004A nationally

Mass Immunizer Roster Biller accounts for 40% of payment for 0004A nationally in 2022, across 16 specialties on claims.

	observed	calculated	calculated	calculated	calculated	calculated
Mass Immunizer Roster Biller	5,167	47%	$7,763,499	40%	195,755	38
Centralized Flu	2,166	20%	$4,241,212	22%	104,634	48
Pharmacy	531	4.8%	$2,042,326	11%	51,110	96
Family Practice	1,212	11%	$1,636,269	8.5%	42,489	35
Internal Medicine	790	7.2%	$1,431,174	7.5%	36,334	46
Nurse Practitioner	667	6.1%	$717,314	3.7%	18,697	28
Clinical Laboratory	61	0.55%	$235,653	1.2%	6,227	102
Emergency Medicine	42	0.38%	$183,960	0.96%	4,776	114
Public Health or Welfare Agency	40	0.36%	$143,531	0.75%	3,729	93
Pediatric Medicine	40	0.36%	$142,674	0.74%	3,730	93
Infectious Disease	22	0.20%	$122,948	0.64%	3,032	138
Physician Assistant	92	0.84%	$79,844	0.42%	2,058	22
All Other Suppliers	18	0.16%	$47,383	0.25%	1,220	68
General Practice	22	0.20%	$45,257	0.24%	1,160	53
Hospitalist	11	0.10%	$31,031	0.16%	759	69

Not listed: 34 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 0004A 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