Nephrology Registered Nurse providers in the U.S.
111 NPPES records list nephrology registered nurse as their primary taxonomy; New Mexico and Massachusetts have the most per resident. 3 of them appear in the Medicare Part D prescriber file: a registry record is not proof of an active practice.
What taxonomy code 163WN0300X means
163WN0300X is the National Uniform Claim Committee code for Registered Nurse, Nephrology, in the grouping Nursing Service Providers. 111 NPPES records list it as their primary taxonomy (file of Aug 9, 2026).
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 163WN0300X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.
San Antonio has the most, 7
Source: CMS NPPES, primary taxonomy 163WN0300X by practice city, file of Aug 9, 2026.
All 30 states and D.C. with records, by state
| State | Records | Per 100,000 |
|---|---|---|
| Arizona | 4 | 0.1 |
| Arkansas | 1 | 0.0 |
| California | 5 | 0.0 |
| Colorado | 3 | 0.1 |
| District of Columbia | 1 | 0.1 |
| Florida | 5 | 0.0 |
| Georgia | 3 | 0.0 |
| Hawaii | 2 | 0.1 |
| Illinois | 2 | 0.0 |
| Indiana | 1 | 0.0 |
| Iowa | 1 | 0.0 |
| Kansas | 3 | 0.1 |
| Kentucky | 1 | 0.0 |
| Maryland | 3 | 0.0 |
| Massachusetts | 8 | 0.1 |
| State | Records | Per 100,000 |
|---|---|---|
| Michigan | 2 | 0.0 |
| Minnesota | 6 | 0.1 |
| Missouri | 8 | 0.1 |
| Montana | 1 | 0.1 |
| New Mexico | 4 | 0.2 |
| New York | 7 | 0.0 |
| North Carolina | 2 | 0.0 |
| Ohio | 5 | 0.0 |
| Oklahoma | 2 | 0.0 |
| Pennsylvania | 2 | 0.0 |
| Rhode Island | 1 | 0.1 |
| Tennessee | 3 | 0.0 |
| Texas | 14 | 0.0 |
| Washington | 4 | 0.1 |
| Wisconsin | 1 | 0.0 |
In federal data
- NUCC code163WN0300X · Registered Nurse
- Size rank511th of 688 specialties by records (0% of all)
- In its family45th of 56 Registered Nurse codes, 0% of the family
- Part D prescribers3 (2.7% of records)
- Part D claims5,217 a year per prescriber, on average (5th of 496)
- Industry payments6 physicians paid $2K in 2024, $339 each on average
- Concentration8 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 nephrology registered nurse records
- Sheila Silsby, NPPittsfield, MA1225095086
- Donna McGhee, RNPHot Springs, AR1134159221
- Edwina SmallDecatur, GA1891727194
- Cynthia Potter, CNPCleveland, OH1629095575
- Karen Servilla, MDAlbuquerque, NM1871508333
- Antonios Tzamaloukas, MDAlbuquerque, NM1316952880
- Phillip Zager, MDAlbuquerque, NM1588679054
- Carol Headley, RN DNSC CNNMemphis, TN1528170172
- David Oliver, RN, CNN, CRNIBethesda, MD1649370040
- Min Choi, RN, CNNWashington, DC1194825349
- Rosanna Erolin, REGISTERED NURSEPuyallup, WA1093807240
- Amy Foster, ARNPTulsa, OK1699847764
Registry order, not a ranking. Search by name to find one provider.
Common questions
Why is Nephrology Registered Nurse a thin NUCC code in NPPES?
Only 111 NPIs list Nephrology Registered Nurse as primary taxonomy across 31 states (peak Texas, 14). That is 511th of 688 NUCC codes by headcount. Thin codes are still searchable by NPI; do not treat the low count as a quality signal.
Do the few Nephrology Registered Nurse NPIs in Open Payments look unusual?
CMS Open Payments 2024 lists 6 paid Nephrology Registered Nurse physicians totaling $2K (76 payments; average $339, 318th of 470 by average). Presence is not a quality judgment; thin specialties often have sparse payment rows.
How much Part D prescribing does this specialty do?
Among Nephrology Registered Nurse NPIs, 3 appear in the Medicare Part D Prescriber PUF (average 5,217 claims and $639K drug cost per prescriber; 5th 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.