Registered Dietitian
NUCC 133V00000X · Dietitian, Registered
64,580 CMS NPPES-registered providers across 55 states · 30th of 690 specialties by headcount.
Where this specialty sits in the corpus
Registered Dietitian ranks 30th of 690 NUCC specialties by CMS NPPES headcount (0.91% of all registered NPIs), densest in California; per resident District of Columbia leads.
- 64,580
- NPPES providers in specialty
- 30th
- of 690 specialties
- 399
- state-share HHI
- 0.4%
- Part D prescriber share
District of Columbia is densest per capita (2.3× the national rate; North Dakota 2×); 94.5% of the Dietitian, Registered category.
Taxonomy fingerprint
Registered Dietitian (NUCC 133V00000X; 0.4% Part D prescribers (236 of 64,580); avg 696 Part D claims/prescriber (223rd of 567); Open Payments avg $668/physician (320th of 552; 164 paid, $110K total); state-share HHI 399; next-larger headcount neighbor Massage Therapist (+4,315); next-smaller Emergency Medicine Physician (-117)).
Next larger: Massage Therapist (68,895) Next smaller: Emergency Medicine Physician (64,463)
Population-adjusted state index
Each multiple is this specialty's providers-per-resident in a state divided by the national rate (Census Vintage population estimates). Raw headcount favors large states; this ranking surfaces denser markets.
Over-indexed vs national rate
- District of Columbia 2.3× · 43.6/100k
- North Dakota 2× · 38.4/100k
- Rhode Island 1.7× · 32.8/100k
- Alaska 1.7× · 32.6/100k
- Massachusetts 1.6× · 30.4/100k
Under-indexed vs national rate
- Puerto Rico 0.52× · 10/100k
- Guam 0.58× · 11.1/100k
- Mississippi 0.66× · 12.6/100k
- Alabama 0.69× · 13.3/100k
- Georgia 0.69× · 13.2/100k
Which states have the most providers?
| # | State | Providers |
|---|---|---|
| 1 | California | 6,792 |
| 2 | Texas | 4,656 |
| 3 | New York | 4,401 |
| 4 | Florida | 3,188 |
| 5 | Pennsylvania | 2,908 |
| 6 | Illinois | 2,739 |
| 7 | North Carolina | 2,555 |
| 8 | Ohio | 2,477 |
| 9 | Massachusetts | 2,127 |
| 10 | Washington | 2,006 |
| 11 | New Jersey | 1,866 |
| 12 | Michigan | 1,747 |
| 13 | Minnesota | 1,556 |
| 14 | Georgia | 1,457 |
| 15 | Wisconsin | 1,444 |
Top Cities for Registered Dietitian
| # | City | Providers |
|---|---|---|
| 1 | ChicagoIllinois | 900 |
| 2 | New YorkNew York | 883 |
| 3 | AustinTexas | 810 |
| 4 | SeattleWashington | 574 |
| 5 | HoustonTexas | 504 |
| 6 | San DiegoCalifornia | 487 |
| 7 | Los AngelesCalifornia | 462 |
| 8 | San FranciscoCalifornia | 407 |
| 9 | BrooklynNew York | 406 |
| 10 | PhoenixArizona | 396 |
| 11 | BostonMassachusetts | 389 |
| 12 | DallasTexas | 388 |
Sample Registered Dietitian NPIs
A directory sample from this NUCC code (not a ranking). Names and locations are unique to this taxonomy.
| # | Provider |
|---|---|
| 1 | Janet Vecchione, RDN, LDN, CDCESMashpee, MA |
| 2 | Susan Langevin, MS, RD, CDE, LDNMethuen, MA |
| 3 | Karna PetersonLindsborg, KS |
| 4 | Evelyn King, R.D.Goshen, IN |
| 5 | Marilyn Mills, RD, CDEBedford, NH |
| 6 | Dena Shields, RDBedford, NH |
| 7 | Diane Hannon, R.D.Concord, MA |
| 8 | Victoria Alwin, R.D.Kernville, CA |
| 9 | Patricia Severson-Wager, RD, CDN, CDEAlbany, NY |
| 10 | Michelle Satchfield, R.D.Beaumont, TX |
| 11 | Deborah NillesNewton, IA |
| 12 | Heather Wayco, RDWashington, DC |
| 13 | Joan MunozNewton, IA |
| 14 | Jenny ThompsonNewton, IA |
| 15 | Gregory Avellana, PAColumbus, OH |
| 16 | Janel Arbon, RDMoab, UT |
| 17 | Elizabeth Triner, R.D.Alexandria, VA |
| 18 | Faye Moseley, RDN CD CDCESTomah, WI |
Related Specialties
Adjacent specialties in the NUCC Health Care Provider Taxonomy - same Dietitian, Registered category.
Compare Registered Dietitian vs Pediatric Nutrition Registered Dietitian →
Frequently Asked Questions
How many Registered Dietitian providers are in the US?
Do Registered Dietitian clinicians appear in Open Payments?
How much Part D prescribing does this specialty do?
Data sources and methodology
Provider data from CMS NPPES (download.cms.gov/nppes). Specialty classification from NUCC Health Care Provider Taxonomy (nucc.org). Part D averages from the CMS Medicare Part D Prescriber PUF; industry payments from CMS Open Payments 2024. Counts reflect self-designated primary taxonomy at NPI enrollment. PlainDoctor does not rate or rank providers. Methodology · About
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-05-20.