Gastroenterology Physician
NUCC 207RG0100X · Internal Medicine
17,061 CMS NPPES-registered providers across 54 states · 63rd of 690 specialties by headcount.
Where this specialty sits in the corpus
Gastroenterology Physician ranks 63rd of 690 NUCC specialties by CMS NPPES headcount (0.23% of all registered NPIs), densest in California; per resident District of Columbia leads.
- 17,061
- NPPES providers in specialty
- 63rd
- of 690 specialties
- 447
- state-share HHI
- 76.6%
- Part D prescriber share
District of Columbia is densest per capita (2.2× the national rate; New York 1.5×); 5.7% of the Internal Medicine category.
Taxonomy fingerprint
Gastroenterology Physician (NUCC 207RG0100X; 76.6% Part D prescribers (13,066 of 17,061); avg 848 Part D claims/prescriber (187th of 572); Open Payments avg $5K/physician (91st of 551; 10,593 paid, $52.4M total); state-share HHI 447; next-larger headcount neighbor Developmental Therapist (+605); next-smaller General Practice Physician (-223)).
Next larger: Developmental Therapist (17,666) Next smaller: General Practice Physician (16,838)
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
- District of Columbia 2.2× · 11.2/100k
- New York 1.5× · 7.8/100k
- Connecticut 1.5× · 7.7/100k
- Massachusetts 1.5× · 7.7/100k
- Rhode Island 1.5× · 7.5/100k
Under-indexed vs national rate
- Wyoming 0.41× · 2.1/100k
- Iowa 0.52× · 2.6/100k
- North Dakota 0.58× · 2.9/100k
- Alaska 0.59× · 3/100k
- Kansas 0.59× · 3/100k
Which states have the most providers?
| # | State | Providers |
|---|---|---|
| 1 | California | 1,749 |
| 2 | New York | 1,518 |
| 3 | Florida | 1,268 |
| 4 | Texas | 1,135 |
| 5 | Pennsylvania | 876 |
| 6 | Illinois | 724 |
| 7 | New Jersey | 629 |
| 8 | Ohio | 625 |
| 9 | North Carolina | 539 |
| 10 | Massachusetts | 538 |
| 11 | Washington | 448 |
| 12 | Georgia | 446 |
| 13 | Virginia | 446 |
| 14 | Maryland | 424 |
| 15 | Michigan | 390 |
Top Cities for Gastroenterology Physician
| # | City | Providers |
|---|---|---|
| 1 | New YorkNew York | 416 |
| 2 | ChicagoIllinois | 215 |
| 3 | HoustonTexas | 209 |
| 4 | BostonMassachusetts | 197 |
| 5 | Los AngelesCalifornia | 172 |
| 6 | PhiladelphiaPennsylvania | 167 |
| 7 | RochesterMinnesota | 145 |
| 8 | BrooklynNew York | 143 |
| 9 | SeattleWashington | 136 |
| 10 | DallasTexas | 132 |
| 11 | JacksonvilleFlorida | 116 |
| 12 | Saint LouisMissouri | 113 |
Sample Gastroenterology Physician NPIs
A directory sample from this NUCC code (not a ranking). Names and locations are unique to this taxonomy.
| # | Provider |
|---|---|
| 1 | Yan Chen, MD, PHDIndependence, MO |
| 2 | Donald Clement, MDIndependence, MO |
| 3 | David Cromwell, M.D.Lutherville, MD |
| 4 | Frederic Stelzer, MDAllentown, PA |
| 5 | Thomas Jones, MDLiberty, MO |
| 6 | Jack Soterakis, M.D.Roslyn, NY |
| 7 | Mark Dellasega, MDGreenville, NC |
| 8 | Terrence Coleman, MDLiberty, MO |
| 9 | Joseph Eisenach, MDKansas City, MO |
| 10 | Robert Kirk, M.D.Owensboro, KY |
| 11 | James Wolper, MDPlantation, FL |
| 12 | Bradley Trope, MDCape Coral, FL |
| 13 | James Cornell, MDAllentown, PA |
| 14 | John Rizzo, M.D.New Hyde Park, NY |
| 15 | Abuzafar Arif, M.D.Elkhart, IN |
| 16 | William Keith, MDCape Coral, FL |
| 17 | Charles Barrier, MDSylva, NC |
| 18 | John Taus, DOAllentown, PA |
Related Specialties
Adjacent specialties in the NUCC Health Care Provider Taxonomy - same Internal Medicine category.
Compare Gastroenterology Physician vs Internal Medicine Physician →
Frequently Asked Questions
Where does the large Gastroenterology Physician headcount concentrate?
How large is Gastroenterology Physician's Open Payments footprint?
How heavy is Gastroenterology 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.