Intellectual & Developmental Disabilities Psychologist
NUCC 103TM1800X · Psychologist
958 CMS NPPES-registered providers across 48 states · 272nd of 690 specialties by headcount.
Where this specialty sits in the corpus
Intellectual & Developmental Disabilities Psychologist ranks 272nd of 690 NUCC specialties by CMS NPPES headcount (0.01% of all registered NPIs), densest in Delaware; per resident Delaware leads.
- 958
- NPPES providers in specialty
- 272nd
- of 690 specialties
- 628
- state-share HHI
- 0.2%
- Part D prescriber share
Delaware is densest per capita (52.7× the national rate; Nebraska 3×); 0.6% of the Psychologist category.
Taxonomy fingerprint
Intellectual & Developmental Disabilities Psychologist (NUCC 103TM1800X; 0.2% Part D prescribers (2 of 958); avg 334 Part D claims/prescriber (354th of 572); Open Payments avg $701/physician (315th of 551; 1 paid, $701 total); state-share HHI 628; next-larger headcount neighbor Adult Psychiatric/Mental Health Clinical Nurse Specialist (+2); next-smaller Pediatric Radiology Physician (-17)).
Next larger: Adult Psychiatric/Mental Health Clinical Nurse Specialist (960) Next smaller: Pediatric Radiology Physician (941)
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
- Washington 0.27× · 0.1/100k
- South Carolina 0.46× · 0.1/100k
- Kentucky 0.55× · 0.2/100k
- Missouri 0.57× · 0.2/100k
- Arizona 0.57× · 0.2/100k
Which states have the most providers?
| # | State | Providers |
|---|---|---|
| 1 | Delaware | 154 |
| 2 | Ohio | 86 |
| 3 | New York | 71 |
| 4 | California | 67 |
| 5 | Florida | 63 |
| 6 | Texas | 55 |
| 7 | Michigan | 45 |
| 8 | North Carolina | 43 |
| 9 | Minnesota | 28 |
| 10 | New Jersey | 26 |
| 11 | Maryland | 25 |
| 12 | Massachusetts | 24 |
| 13 | Illinois | 23 |
| 14 | Pennsylvania | 22 |
| 15 | Georgia | 18 |
Top Cities for Intellectual & Developmental Disabilities Psychologist
| # | City | Providers |
|---|---|---|
| 1 | DoverDelaware | 30 |
| 2 | SmyrnaDelaware | 20 |
| 3 | Saint PaulMinnesota | 18 |
| 4 | HoustonTexas | 17 |
| 5 | NewarkDelaware | 15 |
| 6 | CincinnatiOhio | 15 |
| 7 | MiddletownDelaware | 11 |
| 8 | OmahaNebraska | 9 |
| 9 | New YorkNew York | 9 |
| 10 | ClevelandOhio | 9 |
| 11 | MagnoliaDelaware | 8 |
| 12 | TownsendDelaware | 8 |
Sample Intellectual & Developmental Disabilities Psychologist NPIs
A directory sample from this NUCC code (not a ranking). Names and locations are unique to this taxonomy.
| # | Provider |
|---|---|
| 1 | Susan Redmond-Vaught, PH.D.Fort Campbell, KY |
| 2 | Donald Goldstein, PHDWinston Salem, NC |
| 3 | Tracy Cooper, MSW, LCSW, EI-IMHChicago, IL |
| 4 | Paul Napier, MA, BCBAJacksonville, FL |
| 5 | Cynthia Batiz, PSYDPonce, PR |
| 6 | Betty StephensClermont, FL |
| 7 | Timothy Crawford, PH.D.Winston Salem, NC |
| 8 | Dean Alexander, PH DPomona, CA |
| 9 | Bruce Boyd, PH.D.Salem, OR |
| 10 | Michael Rohr, EDDSomerville, TN |
| 11 | Lynda Sandow, PH.D.Morgantown, IN |
| 12 | Brenda Duffey-JepsenPomona, CA |
| 13 | Susan Havercamp, PHDColumbus, OH |
| 14 | Carol Gandolfo, PSY DPomona, CA |
| 15 | Dyan Yacovelli, PSYDAtascadero, CA |
| 16 | Theodore Kastner, M.D.,M.S.Bloomfield, NJ |
| 17 | James Mulick, PH.D.Westerville, OH |
| 18 | Nathan Henninger, PH.D., ABPPWesterville, OH |
Related Specialties
Adjacent specialties in the NUCC Health Care Provider Taxonomy - same Psychologist category.
Compare Intellectual & Developmental Disabilities Psychologist vs Clinical Psychologist →
Frequently Asked Questions
How should I read Intellectual & Developmental Disabilities Psychologist's mid-pack national roster?
How does Intellectual & Developmental Disabilities Psychologist show up in Open Payments mid-pack?
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 2026-08-27.