Registered Nurse providers in the U.S.
148,485 NPPES records list registered nurse as their primary taxonomy, about 44 per 100,000 residents; Alaska and New York have the most per resident. 694 of them appear in the Medicare Part D prescriber file: a registry record is not proof of an active practice.
What taxonomy code 163W00000X means
163W00000X is the National Uniform Claim Committee code for Registered Nurse, in the grouping Nursing Service Providers. 148,485 NPPES records list it as their primary taxonomy (file of Aug 9, 2026).
(1) A registered nurse is a person qualified by graduation from an accredited nursing school (depending upon schooling, a registered nurse may receive either a diploma from a hospital program, an associate degree in nursing (A.D.N.) or a Bachelor of Science degree in nursing (B.S.N.), who is licensed or certified by the state, and is practicing within the scope of that license or certification. R.N.'s assist patient in recovering and maintaining their physical or mental health. They assist physicians during treatments and examinations and administer medications. (2) A provider who is trained and educated in a formal nursing education program at an accredited school of nursing, passes a national certification examination, and is licensed by the state to practice nursing. The individual provides nursing services to patients or clients in areas such as health promotion, disease prevention, acute and chronic care and restoration and maintenance of health across the life span.
Source: NUCC Health Care Provider Taxonomy code set, definition as NUCC publishes it (nucc.org); counts from CMS NPPES.
Most per resident: the 8 highest
Source: CMS NPPES, primary taxonomy 163W00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.
Brooklyn has the most, 3,563
Source: CMS NPPES, primary taxonomy 163W00000X by practice city, file of Aug 9, 2026.
All 51 by state
| State | Records | Per 100,000 |
|---|---|---|
| Alabama | 1,486 | 29 |
| Alaska | 1,201 | 164 |
| Arizona | 3,124 | 42 |
| Arkansas | 1,216 | 40 |
| California | 13,506 | 35 |
| Colorado | 4,610 | 78 |
| Connecticut | 751 | 21 |
| Delaware | 967 | 94 |
| District of Columbia | 812 | 120 |
| Florida | 4,722 | 21 |
| Georgia | 3,284 | 30 |
| Hawaii | 891 | 62 |
| Idaho | 395 | 20 |
| Illinois | 2,628 | 21 |
| Indiana | 1,480 | 22 |
| Iowa | 833 | 26 |
| Kansas | 997 | 34 |
| Kentucky | 864 | 19 |
| Louisiana | 869 | 19 |
| Maine | 612 | 44 |
| Maryland | 2,453 | 40 |
| Massachusetts | 4,985 | 71 |
| Michigan | 5,589 | 56 |
| Minnesota | 3,418 | 60 |
| Mississippi | 596 | 20 |
| Missouri | 1,586 | 26 |
| State | Records | Per 100,000 |
|---|---|---|
| Montana | 524 | 46 |
| Nebraska | 909 | 46 |
| Nevada | 1,458 | 46 |
| New Hampshire | 377 | 27 |
| New Jersey | 1,613 | 17 |
| New Mexico | 1,554 | 74 |
| New York | 25,740 | 132 |
| North Carolina | 2,100 | 19 |
| North Dakota | 856 | 109 |
| Ohio | 9,656 | 82 |
| Oklahoma | 1,456 | 36 |
| Oregon | 2,449 | 58 |
| Pennsylvania | 5,372 | 41 |
| Rhode Island | 813 | 74 |
| South Carolina | 1,761 | 33 |
| South Dakota | 799 | 87 |
| Tennessee | 3,269 | 46 |
| Texas | 8,921 | 29 |
| Utah | 990 | 29 |
| Vermont | 201 | 31 |
| Virginia | 1,282 | 15 |
| Washington | 5,708 | 73 |
| West Virginia | 1,003 | 57 |
| Wisconsin | 4,628 | 78 |
| Wyoming | 367 | 63 |
In federal data
- NUCC code163W00000X
- Size rank13th of 688 specialties by records (2.03% of all)
- Part D prescribers694 (0.5% of records)
- Part D claims678 a year per prescriber, on average (138th of 496)
- Industry payments1,191 physicians paid $603K in 2024, $506 each on average
- Concentration7 states hold half of all records
Source: CMS NPPES; Medicare Part D Prescriber PUF; CMS Open Payments 2024. Presence in these files is not a quality judgment.
A sample of registered nurse records
- William McAnulty, RNFairbanks, AK1679760763
- Therese Brennan, RNAnchorage, AK1528076650
- Arturo Tovar, RN, EMT-BAnchorage, AK1265619431
- Susan McGloinAnchorage, AK1467624650
- Louise Zeile, RNAnchorage, AK1417282666
- Andrea CombsAnchorage, AK1558692376
- Shirley Harduar, RNAnchorage, AK1225360811
- Tatyana KoenigAnchorage, AK1679805055
- Leila WatfordAnchorage, AK1497087878
- Claire DehartAnchorage, AK1629393269
- Gail CharlesAnchorage, AK1265758510
- Sarah PartainAnchorage, AK1619294915
- Renee Kusner KalarchikAnchorage, AK1629395645
- Richard SmithAnchorage, AK1831418623
- Alison Rossow, RNAnchorage, AK1346560414
- Dezarae Cowles, RNAnchorage, AK1811218118
Registry order, not a ranking. Search by name to find one provider.
Common questions
Where does the large Registered Nurse headcount concentrate?
148,485 Registered Nurse NPIs span 56 states; New York alone holds 25,740. Top metros include Brooklyn, NY; New York, NY; Bronx, NY; San Antonio, TX. Nationally this is 13th of 688 NUCC codes.
How large is Registered Nurse's Open Payments footprint?
CMS Open Payments 2024 lists 1,191 Registered Nurse physicians totaling $603K (8,276 payments; average $506, 288th of 470). Presence in Open Payments is not a quality judgment.
How heavy is Registered Nurse Part D prescribing at scale?
Among Registered Nurse NPIs, 694 appear in the Medicare Part D Prescriber PUF (average 678 claims and $107K drug cost per prescriber; 138th of 496 specialties by average claims). Non-prescribing clinicians in the same NUCC code are still in NPPES.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy (nucc.org); Medicare Part D Prescriber PUF; CMS Open Payments 2024. Counts are self-designated primary taxonomy, not board certification.
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 Aug 9, 2026.