Hematology (Internal Medicine) Physician
NUCC 207RH0000X · Internal Medicine
1,483 CMS NPPES-registered providers across 50 states · 227th of 690 specialties by headcount.
Where this specialty sits in the corpus
Hematology (Internal Medicine) Physician ranks 227th of 690 NUCC specialties by CMS NPPES headcount (0.02% of all registered NPIs), densest in Florida; per resident Minnesota leads.
- 1,483
- NPPES providers in specialty
- 227th
- of 690 specialties
- 579
- state-share HHI
- 71.1%
- Part D prescriber share
Minnesota is densest per capita (3.3× the national rate; Massachusetts 3.1×); 0.5% of the Internal Medicine category.
Taxonomy fingerprint
Hematology (Internal Medicine) Physician (NUCC 207RH0000X; 71.1% Part D prescribers (1,054 of 1,483); avg 684 Part D claims/prescriber (244th of 572); Open Payments avg $14K/physician (22nd of 551; 778 paid, $10.7M total); state-share HHI 579; next-larger headcount neighbor Critical Care Medicine Nurse Practitioner (+7); next-smaller Reproductive Endocrinology Physician (-15)).
Next larger: Critical Care Medicine Nurse Practitioner (1,490) Next smaller: Reproductive Endocrinology Physician (1,468)
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
- Minnesota 3.3× · 1.4/100k
- Massachusetts 3.1× · 1.4/100k
- District of Columbia 2.7× · 1.2/100k
- Delaware 2.4× · 1.1/100k
- New Hampshire 2.3× · 1/100k
Under-indexed vs national rate
- Utah 0.33× · 0.1/100k
- Iowa 0.36× · 0.2/100k
- Kentucky 0.45× · 0.2/100k
- South Carolina 0.47× · 0.2/100k
- Colorado 0.50× · 0.2/100k
Which states have the most providers?
| # | State | Providers |
|---|---|---|
| 1 | Florida | 202 |
| 2 | New York | 142 |
| 3 | California | 132 |
| 4 | Massachusetts | 95 |
| 5 | Minnesota | 82 |
| 6 | Pennsylvania | 70 |
| 7 | Ohio | 68 |
| 8 | Texas | 68 |
| 9 | North Carolina | 65 |
| 10 | Illinois | 49 |
| 11 | New Jersey | 48 |
| 12 | Washington | 42 |
| 13 | Connecticut | 36 |
| 14 | Michigan | 33 |
| 15 | Georgia | 32 |
Top Cities for Hematology (Internal Medicine) Physician
| # | City | Providers |
|---|---|---|
| 1 | BostonMassachusetts | 70 |
| 2 | New YorkNew York | 69 |
| 3 | RochesterMinnesota | 62 |
| 4 | ColumbusOhio | 50 |
| 5 | HoustonTexas | 39 |
| 6 | PhiladelphiaPennsylvania | 34 |
| 7 | ChicagoIllinois | 27 |
| 8 | SeattleWashington | 26 |
| 9 | HackensackNew Jersey | 23 |
| 10 | AtlantaGeorgia | 21 |
| 11 | DuarteCalifornia | 19 |
| 12 | StanfordCalifornia | 19 |
Sample Hematology (Internal Medicine) Physician NPIs
A directory sample from this NUCC code (not a ranking). Names and locations are unique to this taxonomy.
| # | Provider |
|---|---|
| 1 | Kevin Olson, M.D.Tualatin, OR |
| 2 | Ashok Bapat, M.D.Fort Myers, FL |
| 3 | Rebecca Orwoll, M.D.Portland, OR |
| 4 | Richard Edwards, MDHartford, CT |
| 5 | Joerg Rathmann, MDLebanon, NH |
| 6 | Wilfred Geschke, M.D.Portland, OR |
| 7 | Khosrow Mahdavi, MDCosta Mesa, CA |
| 8 | Christopher Wakem, MDBristol, CT |
| 9 | Michael Klein, M.D.Jarrettsville, MD |
| 10 | Koteshwar Telukuntla, MDBradenton, FL |
| 11 | Rakesh Rohatgi, M.D.The Villages, FL |
| 12 | Asim Pati, MDSpartanburg, SC |
| 13 | Harish Malhotra, MDPensacola, FL |
| 14 | Wayne Bottner, MDLa Crosse, WI |
| 15 | Kapisthalam Kumar, MDTrinity, FL |
| 16 | Craig Cole, MDLansing, MI |
| 17 | Mary Mayer, MDIndianapolis, IN |
| 18 | Visaharan Sivasubramaniam, M.D.Jamestown, NY |
Related Specialties
Adjacent specialties in the NUCC Health Care Provider Taxonomy - same Internal Medicine category.
Compare Hematology (Internal Medicine) Physician vs Internal Medicine Physician →
Frequently Asked Questions
Where does the large Hematology (Internal Medicine) Physician headcount concentrate?
How large is Hematology (Internal Medicine) Physician's Open Payments footprint?
How heavy is Hematology (Internal Medicine) Physician Part D prescribing at scale?
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.