Registered Dietitian providers in the U.S.
68,092 NPPES records list registered dietitian as their primary taxonomy, about 20 per 100,000 residents; District of Columbia and North Dakota have the most per resident. 14 of them appear in the Medicare Part D prescriber file: a registry record is not proof of an active practice.
What taxonomy code 133V00000X means
133V00000X is the National Uniform Claim Committee code for Dietitian, Registered, in the grouping Dietary & Nutritional Service Providers. 68,092 NPPES records list it as their primary taxonomy (file of Aug 9, 2026).
A Registered Dietitian (RD)/Registered Dietitian Nutritionist (RDN) is an individual uniquely trained in the science of nutrition and practice of dietetics to design and provide medical nutrition therapy (MNT) and other evidence-based applications of the Nutrition Care Process (NCP) that exemplify the profession's systematic approach to providing high quality nutrition care. Registered dietitians provide MNT for the purpose of disease prevention or management, or to treat or rehabilitate an illness, injury, or condition, with the use of specific, indicated physical and cognitive nutrition care services comprised of one or more of the following aspects of the NCP: nutrition assessment/reassessment, nutrition diagnosis, nutrition intervention (e.g., nutrition counseling, therapeutic diet ordering, and nutrition education) and nutrition monitoring and evaluation.
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 133V00000X by practice state, file of Aug 9, 2026; records per 100,000 residents, 2023 Census estimates.
Austin has the most, 1,048
Source: CMS NPPES, primary taxonomy 133V00000X by practice city, file of Aug 9, 2026.
All 51 by state
| State | Records | Per 100,000 |
|---|---|---|
| Alabama | 725 | 14 |
| Alaska | 237 | 32 |
| Arizona | 1,435 | 19 |
| Arkansas | 573 | 19 |
| California | 7,148 | 18 |
| Colorado | 1,391 | 24 |
| Connecticut | 824 | 23 |
| Delaware | 259 | 25 |
| District of Columbia | 306 | 45 |
| Florida | 3,443 | 15 |
| Georgia | 1,520 | 14 |
| Hawaii | 269 | 19 |
| Idaho | 475 | 24 |
| Illinois | 2,870 | 23 |
| Indiana | 1,218 | 18 |
| Iowa | 694 | 22 |
| Kansas | 575 | 20 |
| Kentucky | 801 | 18 |
| Louisiana | 847 | 19 |
| Maine | 335 | 24 |
| Maryland | 1,124 | 18 |
| Massachusetts | 2,244 | 32 |
| Michigan | 1,816 | 18 |
| Minnesota | 1,590 | 28 |
| Mississippi | 388 | 13 |
| Missouri | 1,368 | 22 |
| State | Records | Per 100,000 |
|---|---|---|
| Montana | 326 | 29 |
| Nebraska | 359 | 18 |
| Nevada | 527 | 17 |
| New Hampshire | 430 | 31 |
| New Jersey | 2,006 | 22 |
| New Mexico | 343 | 16 |
| New York | 4,724 | 24 |
| North Carolina | 2,704 | 25 |
| North Dakota | 309 | 39 |
| Ohio | 2,581 | 22 |
| Oklahoma | 944 | 23 |
| Oregon | 927 | 22 |
| Pennsylvania | 3,083 | 24 |
| Rhode Island | 369 | 34 |
| South Carolina | 800 | 15 |
| South Dakota | 247 | 27 |
| Tennessee | 1,266 | 18 |
| Texas | 5,099 | 17 |
| Utah | 684 | 20 |
| Vermont | 193 | 30 |
| Virginia | 1,307 | 15 |
| Washington | 2,134 | 27 |
| West Virginia | 266 | 15 |
| Wisconsin | 1,457 | 25 |
| Wyoming | 141 | 24 |
In federal data
- NUCC code133V00000X · Dietitian, Registered
- Size rank32nd of 688 specialties by records (0.93% of all)
- In its family1st of 9 Dietitian, Registered codes, 95.1% of the family
- Part D prescribers14 (under 0.1% of records)
- Part D claims214 a year per prescriber, on average (269th of 496)
- Industry payments3 physicians paid $1K in 2024, $398 each on average
- Concentration10 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 dietitian records
- Crystal Flores, MS RD LDNAnchorage, AK1467987719
- Kiana Holland, RDAnchorage, AK1629774617
- Jeanine Baumann, RDAnchorage, AK1265269039
- Monica Smith, RD LDNAnchorage, AK1194978320
- Erika Van Calcar, MS, RD, LDAnchorage, AK1134368111
- Michael Difilippo, MS, RD, LDAnchorage, AK1972939940
- Tamara DeschaineAnchorage, AK1619424314
- Staci Kloster, RDNAnchorage, AK1174252779
- Ashley Funk, RDNAnchorage, AK1457867830
- Kerri Metz, MS, RD/LD, IBCLCAnchorage, AK1952910119
- Abigail Marta, RDAnchorage, AK1831057801
- Sarah Snapp, RDAnchorage, AK1851751143
- Christi Logan, R.D.Elmendorf Afb, AK1063401453
- Jane Heetderks-Cox, RDElmendorf Afb, AK1881684611
- David Brown, RDElmendorf Afb, AK1770565848
- Lisa Schuette, RDElmendorf Afb, AK1043307481
Registry order, not a ranking. Search by name to find one provider.
Common questions
Where does the large Registered Dietitian headcount concentrate?
68,092 Registered Dietitian NPIs span 55 states; California alone holds 7,148. Top metros include Austin, TX; New York, NY; Chicago, IL; Seattle, WA. Nationally this is 32nd of 688 NUCC codes.
How large is Registered Dietitian's Open Payments footprint?
CMS Open Payments 2024 lists 3 Registered Dietitian physicians totaling $1K (42 payments; average $398, 303rd of 470). Presence in Open Payments is not a quality judgment.
How heavy is Registered Dietitian Part D prescribing at scale?
Among Registered Dietitian NPIs, 14 appear in the Medicare Part D Prescriber PUF (average 214 claims and $22K drug cost per prescriber; 269th 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.