Geriatric Medicine (Internal Medicine) Physician
NUCC 207RG0300X · Internal Medicine
4,215 CMS NPPES-registered providers across 52 states · 140th of 690 specialties by headcount.
Where this specialty sits in the corpus
Geriatric Medicine (Internal Medicine) Physician ranks 140th of 690 NUCC specialties by CMS NPPES headcount (0.06% of all registered NPIs), densest in California; per resident District of Columbia leads.
- 4,215
- NPPES providers in specialty
- 140th
- of 690 specialties
- 521
- state-share HHI
- 68.5%
- Part D prescriber share
District of Columbia is densest per capita (2.6× the national rate; Rhode Island 2.3×); 1.4% of the Internal Medicine category.
Taxonomy fingerprint
Geriatric Medicine (Internal Medicine) Physician (NUCC 207RG0300X; 68.5% Part D prescribers (2,888 of 4,215); avg 4,420 Part D claims/prescriber (11th of 572); Open Payments avg $2K/physician (197th of 551; 1,049 paid, $2.0M total); state-share HHI 521; next-larger headcount neighbor Registered Respiratory Therapist (+132); next-smaller Interpreter (-7)).
Next larger: Registered Respiratory Therapist (4,347) Next smaller: Interpreter (4,208)
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 2.6× · 3.2/100k
- Rhode Island 2.3× · 2.9/100k
- Massachusetts 2.2× · 2.7/100k
- New York 2× · 2.5/100k
- Hawaii 2× · 2.5/100k
Under-indexed vs national rate
- Idaho 0.20× · 0.3/100k
- Iowa 0.20× · 0.2/100k
- Oklahoma 0.36× · 0.4/100k
- Kentucky 0.37× · 0.5/100k
- Mississippi 0.38× · 0.5/100k
Which states have the most providers?
| # | State | Providers |
|---|---|---|
| 1 | California | 498 |
| 2 | New York | 493 |
| 3 | Florida | 303 |
| 4 | Texas | 238 |
| 5 | Pennsylvania | 225 |
| 6 | Massachusetts | 190 |
| 7 | Illinois | 155 |
| 8 | New Jersey | 151 |
| 9 | North Carolina | 144 |
| 10 | Michigan | 127 |
| 11 | Maryland | 126 |
| 12 | Ohio | 124 |
| 13 | Virginia | 96 |
| 14 | Colorado | 91 |
| 15 | Washington | 88 |
Top Cities for Geriatric Medicine (Internal Medicine) Physician
| # | City | Providers |
|---|---|---|
| 1 | New YorkNew York | 118 |
| 2 | Los AngelesCalifornia | 70 |
| 3 | BostonMassachusetts | 70 |
| 4 | ChicagoIllinois | 66 |
| 5 | HoustonTexas | 56 |
| 6 | BronxNew York | 54 |
| 7 | BaltimoreMaryland | 50 |
| 8 | BrooklynNew York | 50 |
| 9 | PhiladelphiaPennsylvania | 49 |
| 10 | PortlandOregon | 42 |
| 11 | San FranciscoCalifornia | 40 |
| 12 | AuroraColorado | 40 |
Sample Geriatric Medicine (Internal Medicine) Physician NPIs
A directory sample from this NUCC code (not a ranking). Names and locations are unique to this taxonomy.
| # | Provider |
|---|---|
| 1 | Frederick Rowland, MDRoslindale, MA |
| 2 | Hy Depamphilis, MDHershey, PA |
| 3 | Jeffrey Kulp, MDColorado Springs, CO |
| 4 | Dinh Pham, M.D.Fort Lauderdale, FL |
| 5 | Eun Yoon, M.D.Los Angeles, CA |
| 6 | Subir Ghosh, M.D.Jackson, KY |
| 7 | Eileen Simak, D.O.Allentown, PA |
| 8 | Mark Darrow, M.D.Lawrenceville, GA |
| 9 | Don Yablonowitz, M.D.Lanham, MD |
| 10 | Luis Postigo, M.D.Webster, NY |
| 11 | Andres Mencia, MDOakland Park, FL |
| 12 | Catherine Eng, MDSan Francisco, CA |
| 13 | Marie Aydelotte, M.D.Rochester, NY |
| 14 | Timothy Rodgers, M. D.Golden, CO |
| 15 | Beverly Entwisle, M.D.Concord, NH |
| 16 | G. Allen Power, M.D.Rochester, NY |
| 17 | Scott Schabel, M.D.Rochester, NY |
| 18 | Karl Schwabe, MDHavertown, PA |
Related Specialties
Adjacent specialties in the NUCC Health Care Provider Taxonomy - same Internal Medicine category.
Compare Geriatric Medicine (Internal Medicine) Physician vs Internal Medicine Physician →
Frequently Asked Questions
Where does the large Geriatric Medicine (Internal Medicine) Physician headcount concentrate?
How large is Geriatric Medicine (Internal Medicine) Physician's Open Payments footprint?
How heavy is Geriatric Medicine (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.