Hematology (Pathology) Physician
NUCC 207ZH0000X · Pathology
755 CMS NPPES-registered providers across 47 states · 297th of 690 specialties by headcount.
Where this specialty sits in the corpus
Hematology (Pathology) Physician ranks 297th of 690 NUCC specialties by CMS NPPES headcount (0.01% of all registered NPIs), densest in California; per resident Rhode Island leads.
- 755
- NPPES providers in specialty
- 297th
- of 690 specialties
- 492
- state-share HHI
- 2.9%
- Part D prescriber share
Rhode Island is densest per capita (2× the national rate; Missouri 1.7×); 3.3% of the Pathology category.
Taxonomy fingerprint
Hematology (Pathology) Physician (NUCC 207ZH0000X; 2.9% Part D prescribers (22 of 755); avg 487 Part D claims/prescriber (294th of 572); Open Payments avg $3K/physician (157th of 551; 136 paid, $404K total); state-share HHI 492; next-larger headcount neighbor Medical Technologist (+13); next-smaller Pediatric Nephrology Physician (-2)).
Next larger: Medical Technologist (768) Next smaller: Pediatric Nephrology Physician (753)
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
- Rhode Island 2× · 0.5/100k
- Missouri 1.7× · 0.4/100k
- Washington 1.6× · 0.4/100k
- Utah 1.6× · 0.4/100k
- Tennessee 1.5× · 0.3/100k
Which states have the most providers?
| # | State | Providers |
|---|---|---|
| 1 | California | 90 |
| 2 | Texas | 76 |
| 3 | New York | 57 |
| 4 | Florida | 47 |
| 5 | Illinois | 28 |
| 6 | Washington | 28 |
| 7 | New Jersey | 25 |
| 8 | Missouri | 24 |
| 9 | North Carolina | 24 |
| 10 | Pennsylvania | 24 |
| 11 | Tennessee | 24 |
| 12 | Michigan | 23 |
| 13 | Ohio | 22 |
| 14 | Massachusetts | 21 |
| 15 | Georgia | 19 |
Top Cities for Hematology (Pathology) Physician
| # | City | Providers |
|---|---|---|
| 1 | HoustonTexas | 34 |
| 2 | SeattleWashington | 21 |
| 3 | New YorkNew York | 19 |
| 4 | Los AngelesCalifornia | 17 |
| 5 | Saint LouisMissouri | 17 |
| 6 | BostonMassachusetts | 14 |
| 7 | San FranciscoCalifornia | 12 |
| 8 | TampaFlorida | 12 |
| 9 | RochesterMinnesota | 11 |
| 10 | Salt Lake CityUtah | 11 |
| 11 | AtlantaGeorgia | 9 |
| 12 | ChicagoIllinois | 9 |
Sample Hematology (Pathology) Physician NPIs
A directory sample from this NUCC code (not a ranking). Names and locations are unique to this taxonomy.
| # | Provider |
|---|---|
| 1 | Mihaela Onciu, MDMemphis, TN |
| 2 | Robert Lorsbach, MD PHDCincinnati, OH |
| 3 | Mario Cervantes-Vazquez, M.D.Kingwood, TX |
| 4 | Michelle Hebert, M.D.Conroe, TX |
| 5 | Rachel Altura, MDProvidence, RI |
| 6 | Gregory Cusano, DOFort Worth, TX |
| 7 | Jefferson Pindzola, MDYork, PA |
| 8 | Robert Booth, M.D.Toledo, OH |
| 9 | Elton Smith, MDCharlotte, NC |
| 10 | Lorna Cruz, MDGreenville, SC |
| 11 | Jared Block, M.D.Charlotte, NC |
| 12 | Thomas Reed, M.D.Sarasota, FL |
| 13 | Richard Zellmer, MDColumbus, OH |
| 14 | Amjad Khan, MDEdison, NJ |
| 15 | Margaret Nichols, MDOneida, NY |
| 16 | Robert Dawson, M.D.West Islip, NY |
| 17 | Christine Piller, MDConcord, NC |
| 18 | Michael Graber, M.D.Cincinnati, OH |
Related Specialties
Adjacent specialties in the NUCC Health Care Provider Taxonomy - same Pathology category.
Compare Hematology (Pathology) Physician vs Anatomic Pathology & Clinical Pathology Physician →
Frequently Asked Questions
How should I read Hematology (Pathology) Physician's mid-pack national roster?
How does Hematology (Pathology) Physician 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.