Hematology & Oncology Physician vs Internal Medicine Physician
Internal Medicine Physician has 10.6 times as many registry records as Hematology & Oncology Physician: 149,962 against 14,141. Each count is the NPPES records whose primary taxonomy is the specialty, so it measures how providers describe their main practice, not everyone trained in it.
Hematology & Oncology Physician: 14,141 records in 54 states
Internal Medicine Physician: 149,962 records in 56 states
By state, with records per 100,000 residents
| State | Hematology & Oncology Physician | Internal Medicine Physician | Per 100,000 (first) | Per 100,000 (second) |
|---|---|---|---|---|
| California | 1,583 | 17,696 | 4.1 | 45.4 |
| New York | 1,163 | 12,067 | 5.9 | 61.7 |
| Florida | 818 | 10,151 | 3.6 | 44.9 |
| Texas | 922 | 9,175 | 3.0 | 30.1 |
| Pennsylvania | 784 | 7,300 | 6.0 | 56.3 |
| Illinois | 666 | 7,238 | 5.3 | 57.7 |
| Massachusetts | 461 | 6,825 | 6.6 | 97.5 |
| Michigan | 340 | 5,735 | 3.4 | 57.1 |
| Ohio | 513 | 5,277 | 4.4 | 44.8 |
| New Jersey | 399 | 4,632 | 4.3 | 49.9 |
| North Carolina | 431 | 4,056 | 4.0 | 37.4 |
| Georgia | 396 | 3,911 | 3.6 | 35.5 |
| Maryland | 317 | 3,904 | 5.1 | 63.2 |
| Virginia | 346 | 3,599 | 4.0 | 41.6 |
| Washington | 476 | 3,079 | 6.1 | 39.4 |
| Arizona | 285 | 2,853 | 3.8 | 38.4 |
| Minnesota | 274 | 2,632 | 4.8 | 45.9 |
| Tennessee | 273 | 2,596 | 3.8 | 36.4 |
| Missouri | 237 | 2,604 | 3.8 | 42.0 |
| Connecticut | 198 | 2,623 | 5.5 | 72.5 |
| Wisconsin | 295 | 2,078 | 5.0 | 35.2 |
| Indiana | 245 | 2,109 | 3.6 | 30.7 |
| Colorado | 212 | 2,046 | 3.6 | 34.8 |
| Oregon | 138 | 2,116 | 3.3 | 50.0 |
| South Carolina | 181 | 1,881 | 3.4 | 35.0 |
| Louisiana | 188 | 1,749 | 4.1 | 38.2 |
| Alabama | 191 | 1,705 | 3.7 | 33.4 |
| Kentucky | 152 | 1,526 | 3.4 | 33.7 |
| Nevada | 88 | 1,229 | 2.8 | 38.5 |
| Oklahoma | 128 | 1,115 | 3.2 | 27.5 |
| Kansas | 113 | 1,010 | 3.8 | 34.3 |
| Rhode Island | 88 | 1,033 | 8.0 | 94.3 |
| Mississippi | 64 | 972 | 2.2 | 33.1 |
| District of Columbia | 81 | 901 | 11.9 | 132.7 |
| Iowa | 90 | 871 | 2.8 | 27.2 |
| Hawaii | 49 | 902 | 3.4 | 62.9 |
| Nebraska | 80 | 813 | 4.0 | 41.1 |
| Arkansas | 103 | 768 | 3.4 | 25.0 |
| New Mexico | 64 | 770 | 3.0 | 36.4 |
| West Virginia | 78 | 754 | 4.4 | 42.6 |
| Utah | 99 | 664 | 2.9 | 19.4 |
| New Hampshire | 76 | 673 | 5.4 | 48.0 |
| Maine | 77 | 597 | 5.5 | 42.8 |
| Delaware | 31 | 600 | 3.0 | 58.1 |
| Idaho | 38 | 453 | 1.9 | 23.1 |
| Montana | 44 | 324 | 3.9 | 28.6 |
| Vermont | 22 | 326 | 3.4 | 50.4 |
| North Dakota | 39 | 245 | 5.0 | 31.3 |
| South Dakota | 31 | 247 | 3.4 | 26.9 |
| Alaska | 21 | 177 | 2.9 | 24.1 |
| Wyoming | 12 | 134 | 2.1 | 22.9 |
Source: CMS NPPES (NPPES files on CMS.gov), primary NUCC taxonomy by practice state; 2023 population estimates (census.gov).
Common questions
How many Hematology & Oncology Physician providers are there vs Internal Medicine Physician?
There are 14,141 Hematology & Oncology Physician and 149,962 Internal Medicine Physician records in the CMS NPPES registry, counted by primary taxonomy.
Which specialty is spread across more states?
Internal Medicine Physician has records in 56 states and territories, against 54.
Where is the data from?
Provider counts are from the CMS National Plan and Provider Enumeration System (NPPES). Per-capita rates use 2023 Census population estimates.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of the NPPES file of Aug 9, 2026.