Ambulatory Care Registered Nurse vs Registered Nurse

Registered Nurse has 44.9 times as many registry records as Ambulatory Care Registered Nurse: 148,485 against 3,308. Each count is the NPPES records whose primary taxonomy is the specialty, so it measures how providers describe their main practice, not everyone trained in it.

CMS NPPES, file of Aug 9, 2026; 2023 Census population estimates · method

Ambulatory Care Registered Nurse: 3,308 records in 53 states

California940
Ohio199
Massachusetts164
Texas159
Wisconsin151

Ambulatory Care Registered Nurse nationwide →

Registered Nurse: 148,485 records in 56 states

New York25,740
California13,506
Ohio9,656
Texas8,921
Washington5,708

Registered Nurse nationwide →

By state, with records per 100,000 residents

State	Ambulatory Care Registered Nurse	Registered Nurse	Per 100,000 (first)	Per 100,000 (second)
New York	88	25,740	0.4	131.5
California	940	13,506	2.4	34.7
Ohio	199	9,656	1.7	81.9
Texas	159	8,921	0.5	29.2
Washington	69	5,708	0.9	73.1
Michigan	130	5,589	1.3	55.7
Pennsylvania	43	5,372	0.3	41.4
Massachusetts	164	4,985	2.3	71.2
Florida	59	4,722	0.3	20.9
Wisconsin	151	4,628	2.6	78.3
Colorado	112	4,610	1.9	78.4
Minnesota	71	3,418	1.2	59.6
Georgia	40	3,284	0.4	29.8
Tennessee	35	3,269	0.5	45.9
Arizona	79	3,124	1.1	42.0
Illinois	40	2,628	0.3	20.9
Oregon	59	2,449	1.4	57.9
Maryland	22	2,453	0.4	39.7
North Carolina	30	2,100	0.3	19.4
South Carolina	12	1,761	0.2	32.8
New Mexico	95	1,554	4.5	73.5
Missouri	60	1,586	1.0	25.6
New Jersey	15	1,613	0.2	17.4
Indiana	58	1,480	0.8	21.6
Alabama	18	1,486	0.4	29.1
Oklahoma	32	1,456	0.8	35.9
Nevada	14	1,458	0.4	45.6
Virginia	34	1,282	0.4	14.8
Arkansas	9	1,216	0.3	39.6
Alaska	19	1,201	2.6	163.8
Kansas	51	997	1.7	33.9
West Virginia	6	1,003	0.3	56.7
Utah	12	990	0.4	29.0
Delaware	4	967	0.4	93.7
Nebraska	38	909	1.9	45.9
Hawaii	18	891	1.3	62.1
North Dakota	46	856	5.9	109.2
Kentucky	18	864	0.4	19.1
South Dakota	82	799	8.9	86.9
Louisiana	8	869	0.2	19.0
Iowa	32	833	1.0	26.0
Rhode Island	24	813	2.2	74.2
District of Columbia	8	812	1.2	119.6
Connecticut	6	751	0.2	20.8
Maine	4	612	0.3	43.8
Mississippi	7	596	0.2	20.3
Montana	14	524	1.2	46.3
Idaho	26	395	1.3	20.1
New Hampshire	8	377	0.6	26.9
Wyoming	16	367	2.7	62.8
Vermont	2	201	0.3	31.0

Source: CMS NPPES (NPPES files on CMS.gov), primary NUCC taxonomy by practice state; 2023 population estimates (census.gov).

Common questions

How many Ambulatory Care Registered Nurse providers are there vs Registered Nurse?

There are 3,308 Ambulatory Care Registered Nurse and 148,485 Registered Nurse records in the CMS NPPES registry, counted by primary taxonomy.

Which specialty is spread across more states?

Registered Nurse has records in 56 states and territories, against 53.

Where is the data from?

Provider counts are from the CMS National Plan and Provider Enumeration System (NPPES). Per-capita rates use 2023 Census population estimates.

Two specialties are not substitutes: scope of practice, training and the conditions treated differ. More comparisons →

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of the NPPES file of Aug 9, 2026.