Occupational Therapy Assistant
NUCC 224Z00000X
41,034 CMS NPPES-registered providers across 54 states · 43rd of 690 specialties by headcount.
Where this specialty sits in the corpus
Occupational Therapy Assistant ranks 43rd of 690 NUCC specialties by CMS NPPES headcount (0.58% of all registered NPIs), densest in Texas; per resident Arkansas leads.
- 41,034
- NPPES providers in specialty
- 43rd
- of 690 specialties
- 438
- state-share HHI
- 0%
- Part D prescriber share
Arkansas is densest per capita (2.8× the national rate; Wisconsin 2×).
Taxonomy fingerprint
Occupational Therapy Assistant (NUCC 224Z00000X; 0% Part D prescribers (8 of 41,034); avg 4,023 Part D claims/prescriber (13th of 567); Open Payments avg $1K/physician (269th of 552; 5 paid, $5K total); state-share HHI 438; next-larger headcount neighbor Obstetrics & Gynecology Physician (+3,292); next-smaller Psychiatric/Mental Health Nurse Practitioner (-258)).
Next larger: Obstetrics & Gynecology Physician (44,326) Next smaller: Psychiatric/Mental Health Nurse Practitioner (40,776)
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
Under-indexed vs national rate
- Utah 0.33× · 4/100k
- District of Columbia 0.35× · 4.3/100k
- California 0.37× · 4.5/100k
- Louisiana 0.41× · 5/100k
- Puerto Rico 0.43× · 5.3/100k
Which states have the most providers?
| # | State | Providers |
|---|---|---|
| 1 | Texas | 4,228 |
| 2 | Florida | 3,845 |
| 3 | New York | 2,783 |
| 4 | Ohio | 2,358 |
| 5 | Pennsylvania | 2,141 |
| 6 | California | 1,764 |
| 7 | Illinois | 1,505 |
| 8 | Wisconsin | 1,448 |
| 9 | North Carolina | 1,335 |
| 10 | Indiana | 1,076 |
| 11 | Virginia | 1,074 |
| 12 | Missouri | 1,039 |
| 13 | Arkansas | 1,038 |
| 14 | Arizona | 1,037 |
| 15 | Tennessee | 998 |
Top Cities for Occupational Therapy Assistant
| # | City | Providers |
|---|---|---|
| 1 | North CantonOhio | 422 |
| 2 | HoustonTexas | 382 |
| 3 | San AntonioTexas | 340 |
| 4 | LouisvilleKentucky | 324 |
| 5 | PhoenixArizona | 279 |
| 6 | OrlandoFlorida | 257 |
| 7 | MiamiFlorida | 224 |
| 8 | BrooklynNew York | 211 |
| 9 | Oklahoma CityOklahoma | 165 |
| 10 | DallasTexas | 158 |
| 11 | ChicagoIllinois | 155 |
| 12 | JonesboroArkansas | 142 |
Sample Occupational Therapy Assistant NPIs
A directory sample from this NUCC code (not a ranking). Names and locations are unique to this taxonomy.
| # | Provider |
|---|---|
| 1 | Ron Sheppard, OTMorristown, TN |
| 2 | Katherine Holder, OTR/LCasper, WY |
| 3 | Jill Bannister, COTALebanon, TN |
| 4 | Merae Whitmyer, O.T.A.Medina, OH |
| 5 | Allen Langley, COTAAlamogordo, NM |
| 6 | Bobbi Eckman, OTRoaring Spring, PA |
| 7 | Susan Conrad, COTA/LCedar Falls, IA |
| 8 | Joyce Ford, COTA/L, APBaltimore, MD |
| 9 | April Johnson, OTVirginia Beach, VA |
| 10 | Angela Kidd, COTAGoshen, IN |
| 11 | Judith Phillips, COTAIndianapolis, IN |
| 12 | Candace Keller, COTAIndianapolis, IN |
| 13 | Michelle Pranger, COTAIndianapolis, IN |
| 14 | Cynthia Linton, COTAIndianapolis, IN |
| 15 | Jeffery Miles, COTAIndianapolis, IN |
| 16 | Victoria Ballard, COTAIndianapolis, IN |
| 17 | Kim Baczynski, COTARochester, MN |
| 18 | Sara Franzose, COTALa Crosse, WI |
Related Specialties
Adjacent specialties in the NUCC Health Care Provider Taxonomy.
Frequently Asked Questions
How many Occupational Therapy Assistant providers are in the US?
Do Occupational Therapy Assistant 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.