Sleep Specialist (PhD)
NUCC 173F00000X · Sleep Specialist, PhD
39 CMS NPPES-registered providers across 19 states · 601st of 690 specialties by headcount.
Where this specialty sits in the corpus
Sleep Specialist (PhD) ranks 601st of 690 NUCC specialties by CMS NPPES headcount (0% of all registered NPIs), densest in California; per resident Texas leads.
- 39
- NPPES providers in specialty
- 601st
- of 690 specialties
- 809
- state-share HHI
- 15.4%
- Part D prescriber share
Texas is densest per capita (1.4× the national rate); 100% of the Sleep Specialist, PhD category.
Taxonomy fingerprint
Sleep Specialist (PhD) (NUCC 173F00000X; 15.4% Part D prescribers (6 of 39); avg 1,063 Part D claims/prescriber (134th of 572); Open Payments avg $11K/physician (31st of 551; 5 paid, $56K total); state-share HHI 809; next-larger headcount neighbor Chemical Pathology Physician (+1); next-smaller Biostatiscian (-1)).
Next larger: Chemical Pathology Physician (40) Next smaller: Biostatiscian (38)
Which states have the most providers?
| # | State | Providers |
|---|---|---|
| 1 | California | 6 |
| 2 | Texas | 5 |
| 3 | New York | 4 |
| 4 | Colorado | 3 |
| 5 | Florida | 3 |
| 6 | North Carolina | 3 |
| 7 | Illinois | 2 |
| 8 | Maryland | 2 |
Sample Sleep Specialist (PhD) NPIs
A directory sample from this NUCC code (not a ranking). Names and locations are unique to this taxonomy.
| # | Provider |
|---|---|
| 1 | Harold Alpert, MDNew York, NY |
| 2 | Steven Scheer, M.D.Sarasota, FL |
| 3 | Hisham Bismar, M.D.Burleson, TX |
| 4 | John Schwab, M.D.Baton Rouge, LA |
| 5 | Dahlia Blake, MDHollywood, FL |
| 6 | D Lankford, PH.D.Atlanta, GA |
| 7 | Stephen Grant, MDClive, IA |
| 8 | Singaravelu Jagadeesan, MDGastonia, NC |
| 9 | Santiago Alvarez, HMD. RCP.Moreno Valley, CA |
| 10 | Kelly Wilkinson, B.A.Grants Pass, OR |
| 11 | Cheryl SpinweberLa Jolla, CA |
| 12 | Margaret Fowler, PHDTularosa, NM |
Frequently Asked Questions
Why is Sleep Specialist (PhD) a thin NUCC code in NPPES?
Do the few Sleep Specialist (PhD) NPIs in Open Payments look unusual?
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.