Addiction (Substance Use Disorder) Psychologist
NUCC 103TA0400X · Psychologist
969 CMS NPPES-registered providers across 50 states · 269th of 690 specialties by headcount.
Where this specialty sits in the corpus
Addiction (Substance Use Disorder) Psychologist ranks 269th of 690 NUCC specialties by CMS NPPES headcount (0.01% of all registered NPIs), densest in California; per resident South Dakota leads.
- 969
- NPPES providers in specialty
- 269th
- of 690 specialties
- 687
- state-share HHI
- 1.1%
- Part D prescriber share
South Dakota is densest per capita (5.7× the national rate; Rhode Island 4.5×); 0.6% of the Psychologist category.
Taxonomy fingerprint
Addiction (Substance Use Disorder) Psychologist (NUCC 103TA0400X; 1.1% Part D prescribers (11 of 969); avg 1,391 Part D claims/prescriber (84th of 572); Open Payments avg $179/physician (471st of 551; 5 paid, $897 total); state-share HHI 687; next-larger headcount neighbor Developmental - Behavioral Pediatrics Physician (+5); next-smaller Preventive Medicine/Occupational Environmental Medicine Physician (-6)).
Next larger: Developmental - Behavioral Pediatrics Physician (974) Next smaller: Preventive Medicine/Occupational Environmental Medicine Physician (963)
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
- South Dakota 5.7× · 1.6/100k
- Rhode Island 4.5× · 1.3/100k
- Vermont 3.8× · 1.1/100k
- Michigan 2.7× · 0.8/100k
- Massachusetts 2.6× · 0.8/100k
Which states have the most providers?
| # | State | Providers |
|---|---|---|
| 1 | California | 199 |
| 2 | Michigan | 77 |
| 3 | New York | 63 |
| 4 | Massachusetts | 53 |
| 5 | Ohio | 40 |
| 6 | Florida | 37 |
| 7 | Pennsylvania | 36 |
| 8 | Texas | 36 |
| 9 | Washington | 32 |
| 10 | New Jersey | 27 |
| 11 | North Carolina | 22 |
| 12 | Puerto Rico | 22 |
| 13 | Minnesota | 19 |
| 14 | Oklahoma | 19 |
| 15 | Colorado | 16 |
Top Cities for Addiction (Substance Use Disorder) Psychologist
| # | City | Providers |
|---|---|---|
| 1 | San DiegoCalifornia | 21 |
| 2 | New YorkNew York | 19 |
| 3 | Los AngelesCalifornia | 14 |
| 4 | Rapid CitySouth Dakota | 13 |
| 5 | BostonMassachusetts | 11 |
| 6 | San FranciscoCalifornia | 10 |
| 7 | OaklandCalifornia | 9 |
| 8 | Oklahoma CityOklahoma | 9 |
| 9 | HoustonTexas | 9 |
| 10 | Salt Lake CityUtah | 9 |
| 11 | SeattleWashington | 9 |
| 12 | Walnut CreekCalifornia | 8 |
Sample Addiction (Substance Use Disorder) Psychologist NPIs
A directory sample from this NUCC code (not a ranking). Names and locations are unique to this taxonomy.
| # | Provider |
|---|---|
| 1 | Gregg Etter, MDWarwick, RI |
| 2 | Magaly Marrero, PH.D.San Antonio, TX |
| 3 | April House, M.S.Keyser, WV |
| 4 | Scott Anderson, LMHCTampa, FL |
| 5 | John Grzebieniak, PH.D.New Castle, PA |
| 6 | Valerie Pearson, PH.D.San Diego, CA |
| 7 | Susan Schmidt, PH.D., APA-CPP SUBSTBryn Mawr, PA |
| 8 | Andrew Kane, PH.D.Lawrence, NY |
| 9 | Timothy Barclay, PHDForest, VA |
| 10 | Mark Rush, PH.D.Denver, CO |
| 11 | Robert Dello Russo, PH.D., LADC IBoston, MA |
| 12 | Judith Krulewitz, PH.D.Cambridge, MA |
| 13 | Victor Irizarry, PHDSan Juan, PR |
| 14 | Tedd Habberfield, PH.D.Williamsville, NY |
| 15 | Carol Dyer, PH.D.Saint Louis, MO |
| 16 | Fredericka Jackson, PH.D. CAC IITroy, MI |
| 17 | Sohrab Dadfar, PH.D.Lima, OH |
| 18 | George Lazar, PHDHouston, TX |
Related Specialties
Adjacent specialties in the NUCC Health Care Provider Taxonomy - same Psychologist category.
Compare Addiction (Substance Use Disorder) Psychologist vs Clinical Psychologist →
Frequently Asked Questions
How should I read Addiction (Substance Use Disorder) Psychologist's mid-pack national roster?
How does Addiction (Substance Use Disorder) 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.